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Takashi Iwai [Mon, 9 Dec 2019 09:49:23 +0000 (10:49 +0100)]
ALSA: rme32: Use managed buffer allocation
Clean up the driver with the new managed buffer allocation API.
The hw_free callback became superfluous and got dropped.
Link: https://lore.kernel.org/r/20191209094943.14984-52-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Takashi Iwai [Mon, 9 Dec 2019 09:49:22 +0000 (10:49 +0100)]
ALSA: riptide: Use managed buffer allocation
Clean up the driver with the new managed buffer allocation API.
The superfluous snd_pcm_lib_malloc_pages() and
snd_pcm_lib_free_pages() calls are dropped.
Link: https://lore.kernel.org/r/20191209094943.14984-51-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Takashi Iwai [Mon, 9 Dec 2019 09:49:20 +0000 (10:49 +0100)]
ALSA: oxygen: Use managed buffer allocation
Clean up the drivers with the new managed buffer allocation API.
The superfluous snd_pcm_lib_malloc_pages() and
snd_pcm_lib_free_pages() calls are dropped.
Link: https://lore.kernel.org/r/20191209094943.14984-49-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Takashi Iwai [Mon, 9 Dec 2019 09:49:19 +0000 (10:49 +0100)]
ALSA: mixart: Use managed buffer allocation
Clean up the driver with the new managed buffer allocation API.
The superfluous snd_pcm_lib_malloc_pages() and
snd_pcm_lib_free_pages() calls are dropped.
Link: https://lore.kernel.org/r/20191209094943.14984-48-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Takashi Iwai [Mon, 9 Dec 2019 09:49:18 +0000 (10:49 +0100)]
ALSA: maestro3: Use managed buffer allocation
Clean up the driver with the new managed buffer allocation API.
The superfluous snd_pcm_lib_malloc_pages() and
snd_pcm_lib_free_pages() calls are dropped.
Link: https://lore.kernel.org/r/20191209094943.14984-47-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Takashi Iwai [Mon, 9 Dec 2019 09:49:17 +0000 (10:49 +0100)]
ALSA: lx6464es: Use managed buffer allocation
Clean up the driver with the new managed buffer allocation API.
The superfluous snd_pcm_lib_malloc_pages() and
snd_pcm_lib_free_pages() calls are dropped.
Link: https://lore.kernel.org/r/20191209094943.14984-46-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Takashi Iwai [Mon, 9 Dec 2019 09:49:16 +0000 (10:49 +0100)]
ALSA: lola: Use managed buffer allocation
Clean up the driver with the new managed buffer allocation API.
The superfluous snd_pcm_lib_malloc_pages() and
snd_pcm_lib_free_pages() calls are dropped.
Link: https://lore.kernel.org/r/20191209094943.14984-45-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Takashi Iwai [Mon, 9 Dec 2019 09:49:15 +0000 (10:49 +0100)]
ALSA: intel8x0: Use managed buffer allocation
Clean up the drivers with the new managed buffer allocation API.
The hw_params and hw_free callbacks became superfluous and got
dropped.
Link: https://lore.kernel.org/r/20191209094943.14984-44-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Takashi Iwai [Mon, 9 Dec 2019 09:49:14 +0000 (10:49 +0100)]
ALSA: ice1724: Use managed buffer allocation
Clean up the driver with the new managed buffer allocation API.
The superfluous snd_pcm_lib_malloc_pages() and
snd_pcm_lib_free_pages() calls are dropped.
Link: https://lore.kernel.org/r/20191209094943.14984-43-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Takashi Iwai [Mon, 9 Dec 2019 09:49:13 +0000 (10:49 +0100)]
ALSA: ice1712: Use managed buffer allocation
Clean up the driver with the new managed buffer allocation API.
The hw_params and hw_free callbacks became superfluous and got
dropped.
Link: https://lore.kernel.org/r/20191209094943.14984-42-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Takashi Iwai [Mon, 9 Dec 2019 09:49:12 +0000 (10:49 +0100)]
ALSA: hda: Use managed buffer allocation
Clean up the common driver module with the new managed buffer
allocation API. The superfluous snd_pcm_lib_malloc_pages() and
snd_pcm_lib_free_pages() calls are dropped.
Link: https://lore.kernel.org/r/20191209094943.14984-41-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Takashi Iwai [Mon, 9 Dec 2019 09:49:11 +0000 (10:49 +0100)]
ALSA: fm801: Use managed buffer allocation
Clean up the driver with the new managed buffer allocation API.
The hw_params and hw_free callbacks became superfluous and got
dropped.
Link: https://lore.kernel.org/r/20191209094943.14984-40-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Takashi Iwai [Mon, 9 Dec 2019 09:49:10 +0000 (10:49 +0100)]
ALSA: es1938: Use managed buffer allocation
Clean up the driver with the new managed buffer allocation API.
The hw_params and hw_free callbacks became superfluous and got
dropped.
Link: https://lore.kernel.org/r/20191209094943.14984-39-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Takashi Iwai [Mon, 9 Dec 2019 09:49:09 +0000 (10:49 +0100)]
ALSA: ens137x: Use managed buffer allocation
Clean up the driver with the new managed buffer allocation API.
The hw_params and hw_free callbacks became superfluous and got
dropped.
Link: https://lore.kernel.org/r/20191209094943.14984-38-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Takashi Iwai [Mon, 9 Dec 2019 09:49:08 +0000 (10:49 +0100)]
ALSA: emu10k1: Use managed buffer allocation
Clean up the driver with the new managed buffer allocation API.
The normal playback streams need a workaround for the aligned buffer,
and cannot apply the straight snd_pcm_lib_malloc() stuff, so they
remain untouched, while other streams are converted to the new managed
mode.
Most of hw_params and hw_free callbacks became superfluous and got
dropped.
Link: https://lore.kernel.org/r/20191209094943.14984-37-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Takashi Iwai [Mon, 9 Dec 2019 09:49:07 +0000 (10:49 +0100)]
ALSA: emu10k1x: Use managed buffer allocation
Clean up the driver with the new managed buffer allocation API.
The superfluous snd_pcm_lib_malloc_pages() and
snd_pcm_lib_free_pages() calls are dropped.
Link: https://lore.kernel.org/r/20191209094943.14984-36-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Takashi Iwai [Mon, 9 Dec 2019 09:49:06 +0000 (10:49 +0100)]
ALSA: echoaudio: Use managed buffer allocation
Clean up the drivers with the new managed buffer allocation API.
The superfluous snd_pcm_lib_malloc_pages() and
snd_pcm_lib_free_pages() calls are dropped.
Link: https://lore.kernel.org/r/20191209094943.14984-35-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Takashi Iwai [Mon, 9 Dec 2019 09:49:05 +0000 (10:49 +0100)]
ALSA: ctxfi: Use managed buffer allocation
Clean up the driver with the new managed buffer allocation API.
The superfluous snd_pcm_lib_malloc_pages() and
snd_pcm_lib_free_pages() calls are dropped.
Link: https://lore.kernel.org/r/20191209094943.14984-34-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Takashi Iwai [Mon, 9 Dec 2019 09:49:04 +0000 (10:49 +0100)]
ALSA: cs5535: Use managed buffer allocation
Clean up the driver with the new managed buffer allocation API.
The superfluous snd_pcm_lib_malloc_pages() and
snd_pcm_lib_free_pages() calls are dropped.
Link: https://lore.kernel.org/r/20191209094943.14984-33-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Takashi Iwai [Mon, 9 Dec 2019 09:49:03 +0000 (10:49 +0100)]
ALSA: cs4281: Use managed buffer allocation
Clean up the driver with the new managed buffer allocation API.
The hw_params and hw_free callbacks became superfluous and got
dropped.
Link: https://lore.kernel.org/r/20191209094943.14984-32-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Takashi Iwai [Mon, 9 Dec 2019 09:49:02 +0000 (10:49 +0100)]
ALSA: cmipci: Use managed buffer allocation
Clean up the driver with the new managed buffer allocation API.
The hw_params and hw_free callbacks became superfluous and got
dropped.
Link: https://lore.kernel.org/r/20191209094943.14984-31-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Takashi Iwai [Mon, 9 Dec 2019 09:49:01 +0000 (10:49 +0100)]
ALSA: ca0106: Use managed buffer allocation
Clean up the driver with the new managed buffer allocation API.
The hw_params and hw_free callbacks became superfluous and got
dropped.
Link: https://lore.kernel.org/r/20191209094943.14984-30-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Takashi Iwai [Mon, 9 Dec 2019 09:49:00 +0000 (10:49 +0100)]
ALSA: bt87x: Use managed buffer allocation
Clean up the driver with the new managed buffer allocation API.
The superfluous snd_pcm_lib_malloc_pages() and
snd_pcm_lib_free_pages() calls are dropped.
Link: https://lore.kernel.org/r/20191209094943.14984-29-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Takashi Iwai [Mon, 9 Dec 2019 09:48:59 +0000 (10:48 +0100)]
ALSA: azt3328: Use managed buffer allocation
Clean up the driver with the new managed buffer allocation API.
The hw_params and hw_free callbacks became superfluous and got
dropped.
Link: https://lore.kernel.org/r/20191209094943.14984-28-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Takashi Iwai [Mon, 9 Dec 2019 09:48:58 +0000 (10:48 +0100)]
ALSA: aw2: Use managed buffer allocation
Clean up the driver with the new managed buffer allocation API.
The hw_params and hw_free callbacks became superfluous and got
dropped.
Link: https://lore.kernel.org/r/20191209094943.14984-27-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Takashi Iwai [Mon, 9 Dec 2019 09:48:57 +0000 (10:48 +0100)]
ALSA: au88x0: Use managed buffer allocation
Clean up the drivers with the new managed buffer allocation API.
The superfluous snd_pcm_lib_malloc_pages() and
snd_pcm_lib_free_pages() calls are dropped.
Link: https://lore.kernel.org/r/20191209094943.14984-26-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Takashi Iwai [Mon, 9 Dec 2019 09:48:56 +0000 (10:48 +0100)]
ALSA: atiixp: Use managed buffer allocation
Clean up the drivers with the new managed buffer allocation API.
The superfluous snd_pcm_lib_malloc_pages() and
snd_pcm_lib_free_pages() calls are dropped.
Link: https://lore.kernel.org/r/20191209094943.14984-25-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Takashi Iwai [Mon, 9 Dec 2019 09:48:55 +0000 (10:48 +0100)]
ALSA: asihpi: Use managed buffer allocation
Clean up the driver with the new managed buffer allocation API.
The superfluous snd_pcm_lib_malloc_pages() and
snd_pcm_lib_free_pages() calls are dropped.
Link: https://lore.kernel.org/r/20191209094943.14984-24-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Takashi Iwai [Mon, 9 Dec 2019 09:48:54 +0000 (10:48 +0100)]
ALSA: als4000: Use managed buffer allocation
Clean up the driver with the new managed buffer allocation API.
The hw_params and hw_free callbacks became superfluous and got
dropped.
Link: https://lore.kernel.org/r/20191209094943.14984-23-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Takashi Iwai [Mon, 9 Dec 2019 09:48:53 +0000 (10:48 +0100)]
ALSA: als300: Use managed buffer allocation
Clean up the driver with the new managed buffer allocation API.
The hw_params and hw_free callbacks became superfluous and got
dropped.
Link: https://lore.kernel.org/r/20191209094943.14984-22-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Takashi Iwai [Mon, 9 Dec 2019 09:48:52 +0000 (10:48 +0100)]
ALSA: ali5451: Use managed buffer allocation
Clean up the driver with the new managed buffer allocation API.
The hw_params and hw_free callbacks became superfluous and got
dropped.
Link: https://lore.kernel.org/r/20191209094943.14984-21-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Takashi Iwai [Mon, 9 Dec 2019 09:48:51 +0000 (10:48 +0100)]
ALSA: ad1889: Use managed buffer allocation
Clean up the driver with the new managed buffer allocation API.
The hw_params and hw_free callbacks became superfluous and got
dropped.
Link: https://lore.kernel.org/r/20191209094943.14984-20-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Takashi Iwai [Mon, 9 Dec 2019 09:48:50 +0000 (10:48 +0100)]
ALSA: parisc: Use managed buffer allocation
Clean up the driver with the new managed buffer allocation API.
The hw_free callbacks became superfluous and got dropped.
Link: https://lore.kernel.org/r/20191209094943.14984-19-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Takashi Iwai [Mon, 9 Dec 2019 09:48:49 +0000 (10:48 +0100)]
ALSA: mips: Use managed buffer allocation
Clean up the drivers with the new managed buffer allocation API.
The hw_params and hw_free callbacks became superfluous and got
dropped.
Link: https://lore.kernel.org/r/20191209094943.14984-18-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Takashi Iwai [Mon, 9 Dec 2019 09:48:48 +0000 (10:48 +0100)]
ALSA: wss: Use managed buffer allocation
Clean up the driver with the new managed buffer allocation API.
The hw_free callback became superfluous and got dropped.
Link: https://lore.kernel.org/r/20191209094943.14984-17-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Takashi Iwai [Mon, 9 Dec 2019 09:48:47 +0000 (10:48 +0100)]
ALSA: gus: Use managed buffer allocation
Clean up the driver with the new managed buffer allocation API.
The hw_free callback became superfluous and got dropped.
Link: https://lore.kernel.org/r/20191209094943.14984-16-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Takashi Iwai [Mon, 9 Dec 2019 09:48:46 +0000 (10:48 +0100)]
ALSA: sb: Use managed buffer allocation
Clean up the driver with the new managed buffer allocation API.
The hw_params and hw_free callbacks became superfluous and got
dropped.
Link: https://lore.kernel.org/r/20191209094943.14984-15-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Takashi Iwai [Mon, 9 Dec 2019 09:48:45 +0000 (10:48 +0100)]
ALSA: es18xx: Use managed buffer allocation
Clean up the driver with the new managed buffer allocation API.
The hw_free callback became superfluous and got dropped.
Link: https://lore.kernel.org/r/20191209094943.14984-14-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Takashi Iwai [Mon, 9 Dec 2019 09:48:44 +0000 (10:48 +0100)]
ALSA: es1688: Use managed buffer allocation
Clean up the driver with the new managed buffer allocation API.
The hw_params and hw_free callbacks became superfluous and got
dropped.
Link: https://lore.kernel.org/r/20191209094943.14984-13-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Takashi Iwai [Mon, 9 Dec 2019 09:48:43 +0000 (10:48 +0100)]
ALSA: cmi8330: Use managed buffer allocation
Clean up the driver with the new managed buffer allocation API.
The actual removal of superfluous code will be done in ad1848 and sb
codec drivers later.
Link: https://lore.kernel.org/r/20191209094943.14984-12-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Takashi Iwai [Mon, 9 Dec 2019 09:48:42 +0000 (10:48 +0100)]
ALSA:
ad1816a: Use managed buffer allocation
Clean up the driver with the new managed buffer allocation API.
The hw_params and hw_free callbacks became superfluous and got
dropped.
Link: https://lore.kernel.org/r/20191209094943.14984-11-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Takashi Iwai [Mon, 9 Dec 2019 09:48:41 +0000 (10:48 +0100)]
ALSA: firewire: Use managed buffer allocation
Clean up the drivers with the new managed buffer allocation API.
The superfluous snd_pcm_lib_malloc_pages() and
snd_pcm_lib_free_pages() calls are dropped.
Acked-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Link: https://lore.kernel.org/r/20191209192422.23902-1-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Takashi Iwai [Mon, 9 Dec 2019 09:48:40 +0000 (10:48 +0100)]
ALSA: vx: Use managed buffer allocation
Clean up the driver with the new managed buffer allocation API.
The hw_params and hw_free callbacks became superfluous and got
dropped.
Link: https://lore.kernel.org/r/20191209094943.14984-9-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Takashi Iwai [Mon, 9 Dec 2019 09:48:39 +0000 (10:48 +0100)]
ALSA: pcsp: Use managed buffer allocation
Clean up the driver with the new managed buffer allocation API.
The superfluous snd_pcm_lib_malloc_pages() and
snd_pcm_lib_free_pages() are dropped.
Link: https://lore.kernel.org/r/20191209094943.14984-8-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Takashi Iwai [Mon, 9 Dec 2019 09:48:38 +0000 (10:48 +0100)]
ALSA: ml403: Use managed buffer allocation
Clean up the driver with the new managed buffer allocation API.
The hw_params and hw_free callbacks became superfluous (they were only
useless debug prints) and got dropped.
Link: https://lore.kernel.org/r/20191209094943.14984-7-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Takashi Iwai [Mon, 9 Dec 2019 09:48:37 +0000 (10:48 +0100)]
ALSA: dummy: Use managed buffer allocation
Clean up the driver with the new managed buffer allocation API.
The hw_free callback became superfluous and got dropped.
Link: https://lore.kernel.org/r/20191209094943.14984-6-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Takashi Iwai [Mon, 9 Dec 2019 09:48:36 +0000 (10:48 +0100)]
ALSA: aloop: Use managed buffer allocation
Clean up the driver with the new managed buffer allocation API.
The hw_params callback became superfluous and got dropped.
Link: https://lore.kernel.org/r/20191209094943.14984-5-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Takashi Iwai [Mon, 9 Dec 2019 09:48:35 +0000 (10:48 +0100)]
ALSA: atmel: Use managed buffer allocation
Clean up the driver with the new managed buffer allocation API.
The hw_free_free callbacks became superfluous and got dropped.
Link: https://lore.kernel.org/r/20191209094943.14984-4-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Takashi Iwai [Mon, 9 Dec 2019 09:48:34 +0000 (10:48 +0100)]
ALSA: aaci: Use managed buffer allocation
Clean up the driver with the new managed buffer allocation API.
The superfluous snd_pcm_lib_malloc_pages() and
snd_pcm_lib_free_pages() calls are dropped, and the if block is
flattened accordingly.
Link: https://lore.kernel.org/r/20191209094943.14984-3-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Takashi Iwai [Mon, 9 Dec 2019 09:48:33 +0000 (10:48 +0100)]
ALSA: aoa: Use managed buffer allocation
Clean up the driver with the new managed buffer allocation API.
The hw_params callbacks became superfluous and got dropped.
Link: https://lore.kernel.org/r/20191209094943.14984-2-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Takashi Iwai [Tue, 10 Dec 2019 14:57:27 +0000 (15:57 +0100)]
ALSA: hda: Use standard waitqueue for RIRB wakeup
The HD-audio CORB/RIRB communication was programmed in a way that was
documented in the reference in decades ago, which is essentially a
polling in the waiter side. It's working fine but costs CPU cycles on
some platforms that support only slow communications. Also, for some
platforms that had unreliable communications, we put longer wait time
(2 ms), which accumulate quite long time if you execute many verbs in
a shot (e.g. at the initialization or resume phase).
This patch attempts to improve the situation by introducing the
standard waitqueue in the RIRB waiter side instead of polling. The
test results on my machine show significant improvements. The time
spent for "cat /proc/asound/card*/codec#*" were changed like:
* Intel SKL + Realtek codec
before the patch:
0.00user 0.04system 0:00.10elapsed 40.0%CPU
after the patch:
0.00user 0.01system 0:00.10elapsed 10.0%CPU
* Nvidia GP107GL + Nvidia HDMI codec
before the patch:
0.00user 0.00system 0:02.76elapsed 0.0%CPU
after the patch:
0.00user 0.00system 0:00.01elapsed 17.0%CPU
So, for Intel chips, the total time is same, while the total time is
greatly reduced (from 2.76 to 0.01s) for Nvidia chips.
The only negative data here is the increase of CPU time for Nvidia,
but this is the unavoidable cost for faster wakeups, supposedly.
Link: https://lore.kernel.org/r/20191210145727.22054-1-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Takashi Iwai [Tue, 10 Dec 2019 17:22:09 +0000 (18:22 +0100)]
Merge branch 'for-linus' into for-next
Back-merge the 5.5-devel branch for fixing FireWire bugs.
The upcoming PCM API update patchset relies on these.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Lukas Wunner [Tue, 10 Dec 2019 13:39:50 +0000 (14:39 +0100)]
ALSA: hda/hdmi - Fix duplicate unref of pci_dev
Nicholas Johnson reports a null pointer deref as well as a refcount
underflow upon hot-removal of a Thunderbolt-attached AMD eGPU.
He's bisected the issue down to commit
586bc4aab878 ("ALSA: hda/hdmi -
fix vgaswitcheroo detection for AMD").
The commit iterates over PCI devices using pci_get_class() and
unreferences each device found, even though pci_get_class()
subsequently unreferences the device as well. Fix it.
Fixes:
586bc4aab878 ("ALSA: hda/hdmi - fix vgaswitcheroo detection for AMD")
Link: https://lore.kernel.org/r/PSXP216MB0438BFEAA0617283A834E11580580@PSXP216MB0438.KORP216.PROD.OUTLOOK.COM/
Reported-and-tested-by: Nicholas Johnson <nicholas.johnson-opensource@outlook.com.au>
Signed-off-by: Lukas Wunner <lukas@wunner.de>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Cc: Mika Westerberg <mika.westerberg@linux.intel.com>
Cc: Alexander Deucher <alexander.deucher@amd.com>
Cc: Bjorn Helgaas <helgaas@kernel.org>
Link: https://lore.kernel.org/r/77aa6c01aefe1ebc4004e87b0bc714f2759f15c4.1575985006.git.lukas@wunner.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Takashi Sakamoto [Mon, 9 Dec 2019 15:05:41 +0000 (00:05 +0900)]
ALSA: fireface: fix return value in error path of isochronous resources reservation
Even if isochronous resources reservation fails, error code doesn't return
in pcm.hw_params callback.
Cc: <stable@vger.kernel.org> #5.3+
Fixes:
55162d2bb0e8 ("ALSA: fireface: reserve/release isochronous resources in pcm.hw_params/hw_free callbacks")
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Link: https://lore.kernel.org/r/20191209151655.GA8090@workstation
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Takashi Sakamoto [Mon, 9 Dec 2019 15:03:04 +0000 (00:03 +0900)]
ALSA: oxfw: fix return value in error path of isochronous resources reservation
Even if isochronous resources reservation fails, error code doesn't return
in pcm.hw_params callback.
Cc: <stable@vger.kernel.org> #5.3+
Fixes:
4f380d007052 ("ALSA: oxfw: configure packet format in pcm.hw_params callback")
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Link: https://lore.kernel.org/r/20191209151655.GA8090@workstation
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Takashi Sakamoto [Sun, 8 Dec 2019 23:22:26 +0000 (08:22 +0900)]
ALSA: firewire-motu: fix double unlocked 'motu->mutex'
Mutex is doubly unlocked in some error path of pcm.open. This commit fixes
ALSA firewire-motu driver in Linux kernel v5.5.
Reported-by: kbuild test robot <lkp@intel.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Fixes:
3fd80b200388 ("ALSA: firewire-motu: use the same size of period for PCM substream in AMDTP streams")
Fixes:
0f5482e7875b ("ALSA: firewire-motu: share PCM buffer size for both direction")
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Link: https://lore.kernel.org/r/20191208232226.6685-1-o-takashi@sakamocchi.jp
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Linus Torvalds [Sun, 8 Dec 2019 22:57:55 +0000 (14:57 -0800)]
Linux 5.5-rc1
Linus Torvalds [Sun, 8 Dec 2019 21:28:11 +0000 (13:28 -0800)]
Merge git://git./linux/kernel/git/netdev/net
Pull networking fixes from David Miller:
1) More jumbo frame fixes in r8169, from Heiner Kallweit.
2) Fix bpf build in minimal configuration, from Alexei Starovoitov.
3) Use after free in slcan driver, from Jouni Hogander.
4) Flower classifier port ranges don't work properly in the HW offload
case, from Yoshiki Komachi.
5) Use after free in hns3_nic_maybe_stop_tx(), from Yunsheng Lin.
6) Out of bounds access in mqprio_dump(), from Vladyslav Tarasiuk.
7) Fix flow dissection in dsa TX path, from Alexander Lobakin.
8) Stale syncookie timestampe fixes from Guillaume Nault.
[ Did an evil merge to silence a warning introduced by this pull - Linus ]
* git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (84 commits)
r8169: fix rtl_hw_jumbo_disable for RTL8168evl
net_sched: validate TCA_KIND attribute in tc_chain_tmplt_add()
r8169: add missing RX enabling for WoL on RTL8125
vhost/vsock: accept only packets with the right dst_cid
net: phy: dp83867: fix hfs boot in rgmii mode
net: ethernet: ti: cpsw: fix extra rx interrupt
inet: protect against too small mtu values.
gre: refetch erspan header from skb->data after pskb_may_pull()
pppoe: remove redundant BUG_ON() check in pppoe_pernet
tcp: Protect accesses to .ts_recent_stamp with {READ,WRITE}_ONCE()
tcp: tighten acceptance of ACKs not matching a child socket
tcp: fix rejected syncookies due to stale timestamps
lpc_eth: kernel BUG on remove
tcp: md5: fix potential overestimation of TCP option space
net: sched: allow indirect blocks to bind to clsact in TC
net: core: rename indirect block ingress cb function
net-sysfs: Call dev_hold always in netdev_queue_add_kobject
net: dsa: fix flow dissection on Tx path
net/tls: Fix return values to avoid ENOTSUPP
net: avoid an indirect call in ____sys_recvmsg()
...
Linus Torvalds [Sun, 8 Dec 2019 20:23:42 +0000 (12:23 -0800)]
Merge tag 'scsi-misc' of git://git./linux/kernel/git/jejb/scsi
Pull more SCSI updates from James Bottomley:
"Eleven patches, all in drivers (no core changes) that are either minor
cleanups or small fixes.
They were late arriving, but still safe for -rc1"
* tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
scsi: MAINTAINERS: Add the linux-scsi mailing list to the ISCSI entry
scsi: megaraid_sas: Make poll_aen_lock static
scsi: sd_zbc: Improve report zones error printout
scsi: qla2xxx: Fix qla2x00_request_irqs() for MSI
scsi: qla2xxx: unregister ports after GPN_FT failure
scsi: qla2xxx: fix rports not being mark as lost in sync fabric scan
scsi: pm80xx: Remove unused include of linux/version.h
scsi: pm80xx: fix logic to break out of loop when register value is 2 or 3
scsi: scsi_transport_sas: Fix memory leak when removing devices
scsi: lpfc: size cpu map by last cpu id set
scsi: ibmvscsi_tgt: Remove unneeded variable rc
Linus Torvalds [Sun, 8 Dec 2019 20:12:18 +0000 (12:12 -0800)]
Merge tag '5.5-rc-smb3-fixes-part2' of git://git.samba.org/sfrench/cifs-2.6
Pull cifs fixes from Steve French:
"Nine cifs/smb3 fixes:
- one fix for stable (oops during oplock break)
- two timestamp fixes including important one for updating mtime at
close to avoid stale metadata caching issue on dirty files (also
improves perf by using SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB over the
wire)
- two fixes for "modefromsid" mount option for file create (now
allows mode bits to be set more atomically and accurately on create
by adding "sd_context" on create when modefromsid specified on
mount)
- two fixes for multichannel found in testing this week against
different servers
- two small cleanup patches"
* tag '5.5-rc-smb3-fixes-part2' of git://git.samba.org/sfrench/cifs-2.6:
smb3: improve check for when we send the security descriptor context on create
smb3: fix mode passed in on create for modetosid mount option
cifs: fix possible uninitialized access and race on iface_list
cifs: Fix lookup of SMB connections on multichannel
smb3: query attributes on file close
smb3: remove unused flag passed into close functions
cifs: remove redundant assignment to pointer pneg_ctxt
fs: cifs: Fix atime update check vs mtime
CIFS: Fix NULL-pointer dereference in smb2_push_mandatory_locks
Linus Torvalds [Sun, 8 Dec 2019 19:08:28 +0000 (11:08 -0800)]
Merge branch 'work.misc' of git://git./linux/kernel/git/viro/vfs
Pull misc vfs cleanups from Al Viro:
"No common topic, just three cleanups".
* 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
make __d_alloc() static
fs/namespace: add __user to open_tree and move_mount syscalls
fs/fnctl: fix missing __user in fcntl_rw_hint()
Olof Johansson [Sat, 7 Dec 2019 22:49:53 +0000 (14:49 -0800)]
ALSA: echoaudio: simplify get_audio_levels
The loop optimizer seems to go astray here, and produces some warnings
that don't seem valid.
Still, the code can be simplified -- just clear the whole array at the
beginning, and fill in whatever values are valid on the platform.
Warnings before this change (GCC 8.2.0 ARM allmodconfig):
In file included from ../sound/pci/echoaudio/gina24.c:115:
../sound/pci/echoaudio/echoaudio.c: In function 'snd_echo_vumeters_get':
../sound/pci/echoaudio/echoaudio_dsp.c:647:9: warning: iteration
1073741824 invokes undefined behavior [-Waggressive-loop-optimizations]
In file included from ../sound/pci/echoaudio/layla24.c:112:
../sound/pci/echoaudio/echoaudio.c: In function 'snd_echo_vumeters_get':
../sound/pci/echoaudio/echoaudio_dsp.c:658:9: warning: iteration
1073741824 invokes undefined behavior [-Waggressive-loop-optimizations]
../sound/pci/echoaudio/echoaudio_dsp.c:647:9: warning: iteration
1073741824 invokes undefined behavior [-Waggressive-loop-optimizations]
Signed-off-by: Olof Johansson <olof@lixom.net>
Link: https://lore.kernel.org/r/20191207224953.25944-1-olof@lixom.net
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Linus Torvalds [Sun, 8 Dec 2019 02:38:17 +0000 (18:38 -0800)]
Merge tag 'ntb-5.5' of git://github.com/jonmason/ntb
Pull NTB update from Jon Mason:
"Just a simple patch to add a new Hygon Device ID to the AMD NTB device
driver"
* tag 'ntb-5.5' of git://github.com/jonmason/ntb:
NTB: Add Hygon Device ID
Linus Torvalds [Sun, 8 Dec 2019 02:33:01 +0000 (18:33 -0800)]
Merge branch 'for-linus' of git://git./linux/kernel/git/dtor/input
Pull more input updates from Dmitry Torokhov:
- fixups for Synaptics RMI4 driver
- a quirk for Goodinx touchscreen on Teclast tablet
- a new keycode definition for activating privacy screen feature found
on a few "enterprise" laptops
- updates to snvs_pwrkey driver
- polling uinput device for writing (which is always allowed) now works
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
Input: synaptics-rmi4 - don't increment rmiaddr for SMBus transfers
Input: synaptics-rmi4 - re-enable IRQs in f34v7_do_reflash
Input: goodix - add upside-down quirk for Teclast X89 tablet
Input: add privacy screen toggle keycode
Input: uinput - fix returning EPOLLOUT from uinput_poll
Input: snvs_pwrkey - remove gratuitous NULL initializers
Input: snvs_pwrkey - send key events for i.MX6 S, DL and Q
Linus Torvalds [Sun, 8 Dec 2019 01:07:18 +0000 (17:07 -0800)]
Merge tag 'iomap-5.5-merge-14' of git://git./fs/xfs/xfs-linux
Pull iomap fixes from Darrick Wong:
"Fix a race condition and a use-after-free error:
- Fix a UAF when reporting writeback errors
- Fix a race condition when handling page uptodate on fragmented file
with blocksize < pagesize"
* tag 'iomap-5.5-merge-14' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
iomap: stop using ioend after it's been freed in iomap_finish_ioend()
iomap: fix sub-page uptodate handling
Linus Torvalds [Sun, 8 Dec 2019 01:05:33 +0000 (17:05 -0800)]
Merge tag 'xfs-5.5-merge-17' of git://git./fs/xfs/xfs-linux
Pull xfs fixes from Darrick Wong:
"Fix a couple of resource management errors and a hang:
- fix a crash in the log setup code when log mounting fails
- fix a hang when allocating space on the realtime device
- fix a block leak when freeing space on the realtime device"
* tag 'xfs-5.5-merge-17' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
xfs: fix mount failure crash on invalid iclog memory access
xfs: don't check for AG deadlock for realtime files in bunmapi
xfs: fix realtime file data space leak
Linus Torvalds [Sun, 8 Dec 2019 00:59:25 +0000 (16:59 -0800)]
Merge tag 'for-linus-5.5-ofs1' of git://git./linux/kernel/git/hubcap/linux
Pull orangefs update from Mike Marshall:
"orangefs: posix open permission checking...
Orangefs has no open, and orangefs checks file permissions on each
file access. Posix requires that file permissions be checked on open
and nowhere else. Orangefs-through-the-kernel needs to seem posix
compliant.
The VFS opens files, even if the filesystem provides no method. We can
see if a file was successfully opened for read and or for write by
looking at file->f_mode.
When writes are flowing from the page cache, file is no longer
available. We can trust the VFS to have checked file->f_mode before
writing to the page cache.
The mode of a file might change between when it is opened and IO
commences, or it might be created with an arbitrary mode.
We'll make sure we don't hit EACCES during the IO stage by using
UID 0"
[ This is "posixish", but not a great solution in the long run, since a
proper secure network server shouldn't really trust the client like this.
But proper and secure POSIX behavior requires an open method and a
resulting cookie for IO of some kind, or similar. - Linus ]
* tag 'for-linus-5.5-ofs1' of git://git.kernel.org/pub/scm/linux/kernel/git/hubcap/linux:
orangefs: posix open permission checking...
Linus Torvalds [Sun, 8 Dec 2019 00:56:00 +0000 (16:56 -0800)]
Merge tag 'nfsd-5.5' of git://linux-nfs.org/~bfields/linux
Pull nfsd updates from Bruce Fields:
"This is a relatively quiet cycle for nfsd, mainly various bugfixes.
Possibly most interesting is Trond's fixes for some callback races
that were due to my incomplete understanding of rpc client shutdown.
Unfortunately at the last minute I've started noticing a new
intermittent failure to send callbacks. As the logic seems basically
correct, I'm leaving Trond's patches in for now, and hope to find a
fix in the next week so I don't have to revert those patches"
* tag 'nfsd-5.5' of git://linux-nfs.org/~bfields/linux: (24 commits)
nfsd: depend on CRYPTO_MD5 for legacy client tracking
NFSD fixing possible null pointer derefering in copy offload
nfsd: check for EBUSY from vfs_rmdir/vfs_unink.
nfsd: Ensure CLONE persists data and metadata changes to the target file
SUNRPC: Fix backchannel latency metrics
nfsd: restore NFSv3 ACL support
nfsd: v4 support requires CRYPTO_SHA256
nfsd: Fix cld_net->cn_tfm initialization
lockd: remove __KERNEL__ ifdefs
sunrpc: remove __KERNEL__ ifdefs
race in exportfs_decode_fh()
nfsd: Drop LIST_HEAD where the variable it declares is never used.
nfsd: document callback_wq serialization of callback code
nfsd: mark cb path down on unknown errors
nfsd: Fix races between nfsd4_cb_release() and nfsd4_shutdown_callback()
nfsd: minor 4.1 callback cleanup
SUNRPC: Fix svcauth_gss_proxy_init()
SUNRPC: Trace gssproxy upcall results
sunrpc: fix crash when cache_head become valid before update
nfsd: remove private bin2hex implementation
...
Linus Torvalds [Sun, 8 Dec 2019 00:50:55 +0000 (16:50 -0800)]
Merge tag 'nfs-for-5.5-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs
Pull NFS client updates from Trond Myklebust:
"Highlights include:
Features:
- NFSv4.2 now supports cross device offloaded copy (i.e. offloaded
copy of a file from one source server to a different target
server).
- New RDMA tracepoints for debugging congestion control and Local
Invalidate WRs.
Bugfixes and cleanups
- Drop the NFSv4.1 session slot if nfs4_delegreturn_prepare waits for
layoutreturn
- Handle bad/dead sessions correctly in nfs41_sequence_process()
- Various bugfixes to the delegation return operation.
- Various bugfixes pertaining to delegations that have been revoked.
- Cleanups to the NFS timespec code to avoid unnecessary conversions
between timespec and timespec64.
- Fix unstable RDMA connections after a reconnect
- Close race between waking an RDMA sender and posting a receive
- Wake pending RDMA tasks if connection fails
- Fix MR list corruption, and clean up MR usage
- Fix another RPCSEC_GSS issue with MIC buffer space"
* tag 'nfs-for-5.5-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs: (79 commits)
SUNRPC: Capture completion of all RPC tasks
SUNRPC: Fix another issue with MIC buffer space
NFS4: Trace lock reclaims
NFS4: Trace state recovery operation
NFSv4.2 fix memory leak in nfs42_ssc_open
NFSv4.2 fix kfree in __nfs42_copy_file_range
NFS: remove duplicated include from nfs4file.c
NFSv4: Make _nfs42_proc_copy_notify() static
NFS: Fallocate should use the nfs4_fattr_bitmap
NFS: Return -ETXTBSY when attempting to write to a swapfile
fs: nfs: sysfs: Remove NULL check before kfree
NFS: remove unneeded semicolon
NFSv4: add declaration of current_stateid
NFSv4.x: Drop the slot if nfs4_delegreturn_prepare waits for layoutreturn
NFSv4.x: Handle bad/dead sessions correctly in nfs41_sequence_process()
nfsv4: Move NFSPROC4_CLNT_COPY_NOTIFY to end of list
SUNRPC: Avoid RPC delays when exiting suspend
NFS: Add a tracepoint in nfs_fh_to_dentry()
NFSv4: Don't retry the GETATTR on old stateid in nfs4_delegreturn_done()
NFSv4: Handle NFS4ERR_OLD_STATEID in delegreturn
...
Steve French [Sat, 7 Dec 2019 23:38:22 +0000 (17:38 -0600)]
smb3: improve check for when we send the security descriptor context on create
We had cases in the previous patch where we were sending the security
descriptor context on SMB3 open (file create) in cases when we hadn't
mounted with with "modefromsid" mount option.
Add check for that mount flag before calling ad_sd_context in
open init.
Signed-off-by: Steve French <stfrench@microsoft.com>
Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com>
Linus Torvalds [Sat, 7 Dec 2019 22:51:04 +0000 (14:51 -0800)]
Merge tag 'vfio-v5.5-rc1' of git://github.com/awilliam/linux-vfio
Pull VFIO updates from Alex Williamson:
- Remove hugepage checks for reserved pfns (Ben Luo)
- Fix irq-bypass unregister ordering (Jiang Yi)
* tag 'vfio-v5.5-rc1' of git://github.com/awilliam/linux-vfio:
vfio/pci: call irq_bypass_unregister_producer() before freeing irq
vfio/type1: remove hugepage checks in is_invalid_reserved_pfn()
Linus Torvalds [Sat, 7 Dec 2019 22:49:20 +0000 (14:49 -0800)]
Merge tag 'for-linus-5.5b-rc1-tag' of git://git./linux/kernel/git/xen/tip
Pull more xen updates from Juergen Gross:
- a patch to fix a build warning
- a cleanup of no longer needed code in the Xen event handling
- a small series for the Xen grant driver avoiding high order
allocations and replacing an insane global limit by a per-call one
- a small series fixing Xen frontend/backend module referencing
* tag 'for-linus-5.5b-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
xen-blkback: allow module to be cleanly unloaded
xen/xenbus: reference count registered modules
xen/gntdev: switch from kcalloc() to kvcalloc()
xen/gntdev: replace global limit of mapped pages by limit per call
xen/gntdev: remove redundant non-zero check on ret
xen/events: remove event handling recursion detection
Linus Torvalds [Sat, 7 Dec 2019 22:43:46 +0000 (14:43 -0800)]
Merge branch 'akpm' (patches from Andrew)
Merge misc Kconfig updates from Andrew Morton:
"A number of changes to Kconfig files under lib/ from Changbin Du and
Krzysztof Kozlowski"
* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
lib/: fix Kconfig indentation
kernel-hacking: move DEBUG_FS to 'Generic Kernel Debugging Instruments'
kernel-hacking: move DEBUG_BUGVERBOSE to 'printk and dmesg options'
kernel-hacking: create a submenu for scheduler debugging options
kernel-hacking: move SCHED_STACK_END_CHECK after DEBUG_STACK_USAGE
kernel-hacking: move Oops into 'Lockups and Hangs'
kernel-hacking: move kernel testing and coverage options to same submenu
kernel-hacking: group kernel data structures debugging together
kernel-hacking: create submenu for arch special debugging options
kernel-hacking: group sysrq/kgdb/ubsan into 'Generic Kernel Debugging Instruments'
Heiner Kallweit [Sat, 7 Dec 2019 21:21:52 +0000 (22:21 +0100)]
r8169: fix rtl_hw_jumbo_disable for RTL8168evl
In referenced fix we removed the RTL8168e-specific jumbo config for
RTL8168evl in rtl_hw_jumbo_enable(). We have to do the same in
rtl_hw_jumbo_disable().
v2: fix referenced commit id
Fixes:
14012c9f3bb9 ("r8169: fix jumbo configuration for RTL8168evl")
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Linus Torvalds [Sat, 7 Dec 2019 21:53:09 +0000 (13:53 -0800)]
pipe: don't use 'pipe_wait() for basic pipe IO
pipe_wait() may be simple, but since it relies on the pipe lock, it
means that we have to do the wakeup while holding the lock. That's
unfortunate, because the very first thing the waked entity will want to
do is to get the pipe lock for itself.
So get rid of the pipe_wait() usage by simply releasing the pipe lock,
doing the wakeup (if required) and then using wait_event_interruptible()
to wait on the right condition instead.
wait_event_interruptible() handles races on its own by comparing the
wakeup condition before and after adding itself to the wait queue, so
you can use an optimistic unlocked condition for it.
Cc: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Jiasen Lin [Sun, 17 Nov 2019 21:48:36 +0000 (16:48 -0500)]
NTB: Add Hygon Device ID
Signed-off-by: Jiasen Lin <linjiasen@hygon.cn>
Signed-off-by: Jon Mason <jdmason@kudzu.us>
Linus Torvalds [Sat, 7 Dec 2019 21:21:01 +0000 (13:21 -0800)]
pipe: remove 'waiting_writers' merging logic
This code is ancient, and goes back to when we only had a single page
for the pipe buffers. The exact history is hidden in the mists of time
(ie "before git", and in fact predates the BK repository too).
At that long-ago point in time, it actually helped to try to merge big
back-and-forth pipe reads and writes, and not limit pipe reads to the
single pipe buffer in length just because that was all we had at a time.
However, since then we've expanded the pipe buffers to multiple pages,
and this logic really doesn't seem to make sense. And a lot of it is
somewhat questionable (ie "hmm, the user asked for a non-blocking read,
but we see that there's a writer pending, so let's wait anyway to get
the extra data that the writer will have").
But more importantly, it makes the "go to sleep" logic much less
obvious, and considering the wakeup issues we've had, I want to make for
less of those kinds of things.
Cc: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Linus Torvalds [Sat, 7 Dec 2019 20:54:26 +0000 (12:54 -0800)]
pipe: fix and clarify pipe read wakeup logic
This is the read side version of the previous commit: it simplifies the
logic to only wake up waiting writers when necessary, and makes sure to
use a synchronous wakeup. This time not so much for GNU make jobserver
reasons (that pipe never fills up), but simply to get the writer going
quickly again.
A bit less verbose commentary this time, if only because I assume that
the write side commentary isn't going to be ignored if you touch this
code.
Cc: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Linus Torvalds [Sat, 7 Dec 2019 20:14:28 +0000 (12:14 -0800)]
pipe: fix and clarify pipe write wakeup logic
The pipe rework ends up having been extra painful, partly becaused of
actual bugs with ordering and caching of the pipe state, but also
because of subtle performance issues.
In particular, the pipe rework caused the kernel build to inexplicably
slow down.
The reason turns out to be that the GNU make jobserver (which limits the
parallelism of the build) uses a pipe to implement a "token" system: a
parallel submake will read a character from the pipe to get the job
token before starting a new job, and will write a character back to the
pipe when it is done. The overall job limit is thus easily controlled
by just writing the appropriate number of initial token characters into
the pipe.
But to work well, that really means that the old behavior of write
wakeups being synchronous (WF_SYNC) is very important - when the pipe
writer wakes up a reader, we want the reader to actually get scheduled
immediately. Otherwise you lose the parallelism of the build.
The pipe rework lost that synchronous wakeup on write, and we had
clearly all forgotten the reasons and rules for it.
This rewrites the pipe write wakeup logic to do the required Wsync
wakeups, but also clarifies the logic and avoids extraneous wakeups.
It also ends up addign a number of comments about what oit does and why,
so that we hopefully don't end up forgetting about this next time we
change this code.
Cc: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Eric Dumazet [Sat, 7 Dec 2019 19:34:45 +0000 (11:34 -0800)]
net_sched: validate TCA_KIND attribute in tc_chain_tmplt_add()
Use the new tcf_proto_check_kind() helper to make sure user
provided value is well formed.
BUG: KMSAN: uninit-value in string_nocheck lib/vsprintf.c:606 [inline]
BUG: KMSAN: uninit-value in string+0x4be/0x600 lib/vsprintf.c:668
CPU: 0 PID: 12358 Comm: syz-executor.1 Not tainted 5.4.0-rc8-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1c9/0x220 lib/dump_stack.c:118
kmsan_report+0x128/0x220 mm/kmsan/kmsan_report.c:108
__msan_warning+0x64/0xc0 mm/kmsan/kmsan_instr.c:245
string_nocheck lib/vsprintf.c:606 [inline]
string+0x4be/0x600 lib/vsprintf.c:668
vsnprintf+0x218f/0x3210 lib/vsprintf.c:2510
__request_module+0x2b1/0x11c0 kernel/kmod.c:143
tcf_proto_lookup_ops+0x171/0x700 net/sched/cls_api.c:139
tc_chain_tmplt_add net/sched/cls_api.c:2730 [inline]
tc_ctl_chain+0x1904/0x38a0 net/sched/cls_api.c:2850
rtnetlink_rcv_msg+0x115a/0x1580 net/core/rtnetlink.c:5224
netlink_rcv_skb+0x431/0x620 net/netlink/af_netlink.c:2477
rtnetlink_rcv+0x50/0x60 net/core/rtnetlink.c:5242
netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline]
netlink_unicast+0xf3e/0x1020 net/netlink/af_netlink.c:1328
netlink_sendmsg+0x110f/0x1330 net/netlink/af_netlink.c:1917
sock_sendmsg_nosec net/socket.c:637 [inline]
sock_sendmsg net/socket.c:657 [inline]
___sys_sendmsg+0x14ff/0x1590 net/socket.c:2311
__sys_sendmsg net/socket.c:2356 [inline]
__do_sys_sendmsg net/socket.c:2365 [inline]
__se_sys_sendmsg+0x305/0x460 net/socket.c:2363
__x64_sys_sendmsg+0x4a/0x70 net/socket.c:2363
do_syscall_64+0xb6/0x160 arch/x86/entry/common.c:291
entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45a649
Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:
00007f0790795c78 EFLAGS:
00000246 ORIG_RAX:
000000000000002e
RAX:
ffffffffffffffda RBX:
0000000000000003 RCX:
000000000045a649
RDX:
0000000000000000 RSI:
0000000020000300 RDI:
0000000000000006
RBP:
000000000075bfc8 R08:
0000000000000000 R09:
0000000000000000
R10:
0000000000000000 R11:
0000000000000246 R12:
00007f07907966d4
R13:
00000000004c8db5 R14:
00000000004df630 R15:
00000000ffffffff
Uninit was created at:
kmsan_save_stack_with_flags mm/kmsan/kmsan.c:149 [inline]
kmsan_internal_poison_shadow+0x5c/0x110 mm/kmsan/kmsan.c:132
kmsan_slab_alloc+0x97/0x100 mm/kmsan/kmsan_hooks.c:86
slab_alloc_node mm/slub.c:2773 [inline]
__kmalloc_node_track_caller+0xe27/0x11a0 mm/slub.c:4381
__kmalloc_reserve net/core/skbuff.c:141 [inline]
__alloc_skb+0x306/0xa10 net/core/skbuff.c:209
alloc_skb include/linux/skbuff.h:1049 [inline]
netlink_alloc_large_skb net/netlink/af_netlink.c:1174 [inline]
netlink_sendmsg+0x783/0x1330 net/netlink/af_netlink.c:1892
sock_sendmsg_nosec net/socket.c:637 [inline]
sock_sendmsg net/socket.c:657 [inline]
___sys_sendmsg+0x14ff/0x1590 net/socket.c:2311
__sys_sendmsg net/socket.c:2356 [inline]
__do_sys_sendmsg net/socket.c:2365 [inline]
__se_sys_sendmsg+0x305/0x460 net/socket.c:2363
__x64_sys_sendmsg+0x4a/0x70 net/socket.c:2363
do_syscall_64+0xb6/0x160 arch/x86/entry/common.c:291
entry_SYSCALL_64_after_hwframe+0x44/0xa9
Fixes:
6f96c3c6904c ("net_sched: fix backward compatibility for TCA_KIND")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: syzbot <syzkaller@googlegroups.com>
Acked-by: Cong Wang <xiyou.wangcong@gmail.com>
Cc: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Cc: Jiri Pirko <jiri@resnulli.us>
Signed-off-by: David S. Miller <davem@davemloft.net>
Heiner Kallweit [Fri, 6 Dec 2019 22:27:15 +0000 (23:27 +0100)]
r8169: add missing RX enabling for WoL on RTL8125
RTL8125 also requires to enable RX for WoL.
v2: add missing Fixes tag
Fixes:
f1bce4ad2f1c ("r8169: add support for RTL8125")
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Stefano Garzarella [Fri, 6 Dec 2019 14:39:12 +0000 (15:39 +0100)]
vhost/vsock: accept only packets with the right dst_cid
When we receive a new packet from the guest, we check if the
src_cid is correct, but we forgot to check the dst_cid.
The host should accept only packets where dst_cid is
equal to the host CID.
Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Grygorii Strashko [Fri, 6 Dec 2019 12:34:32 +0000 (14:34 +0200)]
net: phy: dp83867: fix hfs boot in rgmii mode
The commit
ef87f7da6b28 ("net: phy: dp83867: move dt parsing to probe")
causes regression on TI dra71x-evm and dra72x-evm, where DP83867 PHY is
used in "rgmii-id" mode - the networking stops working.
Unfortunately, it's not enough to just move DT parsing code to .probe() as
it depends on phydev->interface value, which is set to correct value abter
the .probe() is completed and before calling .config_init(). So, RGMII
configuration can't be loaded from DT.
To fix and issue
- move RGMII validation code to .config_init()
- parse RGMII parameters in dp83867_of_init(), but consider them as
optional.
Fixes:
ef87f7da6b28 ("net: phy: dp83867: move dt parsing to probe")
Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Grygorii Strashko [Fri, 6 Dec 2019 12:28:20 +0000 (14:28 +0200)]
net: ethernet: ti: cpsw: fix extra rx interrupt
Now RX interrupt is triggered twice every time, because in
cpsw_rx_interrupt() it is asked first and then disabled. So there will be
pending interrupt always, when RX interrupt is enabled again in NAPI
handler.
Fix it by first disabling IRQ and then do ask.
Fixes:
870915feabdc ("drivers: net: cpsw: remove disable_irq/enable_irq as irq can be masked from cpsw itself")
Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Eric Dumazet [Fri, 6 Dec 2019 04:43:46 +0000 (20:43 -0800)]
inet: protect against too small mtu values.
syzbot was once again able to crash a host by setting a very small mtu
on loopback device.
Let's make inetdev_valid_mtu() available in include/net/ip.h,
and use it in ip_setup_cork(), so that we protect both ip_append_page()
and __ip_append_data()
Also add a READ_ONCE() when the device mtu is read.
Pairs this lockless read with one WRITE_ONCE() in __dev_set_mtu(),
even if other code paths might write over this field.
Add a big comment in include/linux/netdevice.h about dev->mtu
needing READ_ONCE()/WRITE_ONCE() annotations.
Hopefully we will add the missing ones in followup patches.
[1]
refcount_t: saturated; leaking memory.
WARNING: CPU: 0 PID: 9464 at lib/refcount.c:22 refcount_warn_saturate+0x138/0x1f0 lib/refcount.c:22
Kernel panic - not syncing: panic_on_warn set ...
CPU: 0 PID: 9464 Comm: syz-executor850 Not tainted 5.4.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x197/0x210 lib/dump_stack.c:118
panic+0x2e3/0x75c kernel/panic.c:221
__warn.cold+0x2f/0x3e kernel/panic.c:582
report_bug+0x289/0x300 lib/bug.c:195
fixup_bug arch/x86/kernel/traps.c:174 [inline]
fixup_bug arch/x86/kernel/traps.c:169 [inline]
do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:267
do_invalid_op+0x37/0x50 arch/x86/kernel/traps.c:286
invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1027
RIP: 0010:refcount_warn_saturate+0x138/0x1f0 lib/refcount.c:22
Code: 06 31 ff 89 de e8 c8 f5 e6 fd 84 db 0f 85 6f ff ff ff e8 7b f4 e6 fd 48 c7 c7 e0 71 4f 88 c6 05 56 a6 a4 06 01 e8 c7 a8 b7 fd <0f> 0b e9 50 ff ff ff e8 5c f4 e6 fd 0f b6 1d 3d a6 a4 06 31 ff 89
RSP: 0018:
ffff88809689f550 EFLAGS:
00010286
RAX:
0000000000000000 RBX:
0000000000000000 RCX:
0000000000000000
RDX:
0000000000000000 RSI:
ffffffff815e4336 RDI:
ffffed1012d13e9c
RBP:
ffff88809689f560 R08:
ffff88809c50a3c0 R09:
fffffbfff15d31b1
R10:
fffffbfff15d31b0 R11:
ffffffff8ae98d87 R12:
0000000000000001
R13:
0000000000040100 R14:
ffff888099041104 R15:
ffff888218d96e40
refcount_add include/linux/refcount.h:193 [inline]
skb_set_owner_w+0x2b6/0x410 net/core/sock.c:1999
sock_wmalloc+0xf1/0x120 net/core/sock.c:2096
ip_append_page+0x7ef/0x1190 net/ipv4/ip_output.c:1383
udp_sendpage+0x1c7/0x480 net/ipv4/udp.c:1276
inet_sendpage+0xdb/0x150 net/ipv4/af_inet.c:821
kernel_sendpage+0x92/0xf0 net/socket.c:3794
sock_sendpage+0x8b/0xc0 net/socket.c:936
pipe_to_sendpage+0x2da/0x3c0 fs/splice.c:458
splice_from_pipe_feed fs/splice.c:512 [inline]
__splice_from_pipe+0x3ee/0x7c0 fs/splice.c:636
splice_from_pipe+0x108/0x170 fs/splice.c:671
generic_splice_sendpage+0x3c/0x50 fs/splice.c:842
do_splice_from fs/splice.c:861 [inline]
direct_splice_actor+0x123/0x190 fs/splice.c:1035
splice_direct_to_actor+0x3b4/0xa30 fs/splice.c:990
do_splice_direct+0x1da/0x2a0 fs/splice.c:1078
do_sendfile+0x597/0xd00 fs/read_write.c:1464
__do_sys_sendfile64 fs/read_write.c:1525 [inline]
__se_sys_sendfile64 fs/read_write.c:1511 [inline]
__x64_sys_sendfile64+0x1dd/0x220 fs/read_write.c:1511
do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x441409
Code: e8 ac e8 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 eb 08 fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:
00007fffb64c4f78 EFLAGS:
00000246 ORIG_RAX:
0000000000000028
RAX:
ffffffffffffffda RBX:
0000000000000000 RCX:
0000000000441409
RDX:
0000000000000000 RSI:
0000000000000006 RDI:
0000000000000005
RBP:
0000000000073b8a R08:
0000000000000010 R09:
0000000000000010
R10:
0000000000010001 R11:
0000000000000246 R12:
0000000000402180
R13:
0000000000402210 R14:
0000000000000000 R15:
0000000000000000
Kernel Offset: disabled
Rebooting in 86400 seconds..
Fixes:
1470ddf7f8ce ("inet: Remove explicit write references to sk/inet in ip_append_data")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: syzbot <syzkaller@googlegroups.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Cong Wang [Fri, 6 Dec 2019 03:39:02 +0000 (19:39 -0800)]
gre: refetch erspan header from skb->data after pskb_may_pull()
After pskb_may_pull() we should always refetch the header
pointers from the skb->data in case it got reallocated.
In gre_parse_header(), the erspan header is still fetched
from the 'options' pointer which is fetched before
pskb_may_pull().
Found this during code review of a KMSAN bug report.
Fixes:
cb73ee40b1b3 ("net: ip_gre: use erspan key field for tunnel lookup")
Cc: Lorenzo Bianconi <lorenzo.bianconi@redhat.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Acked-by: Lorenzo Bianconi <lorenzo.bianconi@redhat.com>
Acked-by: William Tu <u9012063@gmail.com>
Reviewed-by: Simon Horman <simon.horman@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Aditya Pakki [Thu, 5 Dec 2019 23:04:49 +0000 (17:04 -0600)]
pppoe: remove redundant BUG_ON() check in pppoe_pernet
Passing NULL to pppoe_pernet causes a crash via BUG_ON.
Dereferencing net in net_generici() also has the same effect. This patch
removes the redundant BUG_ON check on the same parameter.
Signed-off-by: Aditya Pakki <pakki001@umn.edu>
Signed-off-by: David S. Miller <davem@davemloft.net>
Krzysztof Kozlowski [Sat, 7 Dec 2019 01:04:08 +0000 (17:04 -0800)]
lib/: fix Kconfig indentation
Adjust indentation from spaces to tab (+optional two spaces) as in
coding style with command like:
$ sed -e 's/^ / /' -i */Kconfig
Link: http://lkml.kernel.org/r/20191120140140.19148-1-krzk@kernel.org
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Changbin Du [Sat, 7 Dec 2019 01:04:06 +0000 (17:04 -0800)]
kernel-hacking: move DEBUG_FS to 'Generic Kernel Debugging Instruments'
DEBUG_FS does not belong to 'Compile-time checks and compiler options'.
Link: http://lkml.kernel.org/r/20190909144453.3520-10-changbin.du@gmail.com
Cc: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Changbin Du <changbin.du@gmail.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Tested-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Changbin Du [Sat, 7 Dec 2019 01:04:03 +0000 (17:04 -0800)]
kernel-hacking: move DEBUG_BUGVERBOSE to 'printk and dmesg options'
I think DEBUG_BUGVERBOSE is a dmesg option which gives more debug info
to dmesg.
Link: http://lkml.kernel.org/r/20190909144453.3520-9-changbin.du@gmail.com
Signed-off-by: Changbin Du <changbin.du@gmail.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Tested-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Changbin Du [Sat, 7 Dec 2019 01:04:00 +0000 (17:04 -0800)]
kernel-hacking: create a submenu for scheduler debugging options
Create a submenu 'Scheduler Debugging' for scheduler debugging options.
Link: http://lkml.kernel.org/r/20190909144453.3520-8-changbin.du@gmail.com
Signed-off-by: Changbin Du <changbin.du@gmail.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Tested-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Changbin Du [Sat, 7 Dec 2019 01:03:57 +0000 (17:03 -0800)]
kernel-hacking: move SCHED_STACK_END_CHECK after DEBUG_STACK_USAGE
They are both memory debug options to debug kernel stack issues.
Link: http://lkml.kernel.org/r/20190909144453.3520-7-changbin.du@gmail.com
Signed-off-by: Changbin Du <changbin.du@gmail.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Tested-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Changbin Du [Sat, 7 Dec 2019 01:03:54 +0000 (17:03 -0800)]
kernel-hacking: move Oops into 'Lockups and Hangs'
They are similar options so place them together.
Link: http://lkml.kernel.org/r/20190909144453.3520-6-changbin.du@gmail.com
Signed-off-by: Changbin Du <changbin.du@gmail.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Tested-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Changbin Du [Sat, 7 Dec 2019 01:03:51 +0000 (17:03 -0800)]
kernel-hacking: move kernel testing and coverage options to same submenu
Move error injection, coverage, testing options to a new top level
submenu 'Kernel Testing and Coverage'. They are all for test purpose.
Link: http://lkml.kernel.org/r/20190909144453.3520-5-changbin.du@gmail.com
Signed-off-by: Changbin Du <changbin.du@gmail.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Tested-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Changbin Du [Sat, 7 Dec 2019 01:03:48 +0000 (17:03 -0800)]
kernel-hacking: group kernel data structures debugging together
Group these similar runtime data structures verification options
together.
Link: http://lkml.kernel.org/r/20190909144453.3520-4-changbin.du@gmail.com
Signed-off-by: Changbin Du <changbin.du@gmail.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Tested-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Changbin Du [Sat, 7 Dec 2019 01:03:45 +0000 (17:03 -0800)]
kernel-hacking: create submenu for arch special debugging options
The arch special options are a little long, so create a submenu for
them.
Link: http://lkml.kernel.org/r/20190909144453.3520-3-changbin.du@gmail.com
Signed-off-by: Changbin Du <changbin.du@gmail.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Tested-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Changbin Du [Sat, 7 Dec 2019 01:03:42 +0000 (17:03 -0800)]
kernel-hacking: group sysrq/kgdb/ubsan into 'Generic Kernel Debugging Instruments'
Patch series "hacking: make 'kernel hacking' menu better structurized", v3.
This series is a trivial improvment for the layout of 'kernel hacking'
configuration menu. Now we have many items in it which makes takes a
little time to look up them since they are not well structurized yet.
Early discussion is here:
https://lkml.org/lkml/2019/9/1/39
This patch (of 9):
Group generic kernel debugging instruments sysrq/kgdb/ubsan together
into a new submenu.
Link: http://lkml.kernel.org/r/20190909144453.3520-2-changbin.du@gmail.com
Signed-off-by: Changbin Du <changbin.du@gmail.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Tested-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Linus Torvalds [Sat, 7 Dec 2019 18:41:17 +0000 (10:41 -0800)]
pipe: fix poll/select race introduced by the pipe rework
The kernel wait queues have a basic rule to them: you add yourself to
the wait-queue first, and then you check the things that you're going to
wait on. That avoids the races with the event you're waiting for.
The same goes for poll/select logic: the "poll_wait()" goes first, and
then you check the things you're polling for.
Of course, if you use locking, the ordering doesn't matter since the
lock will serialize with anything that changes the state you're looking
at. That's not the case here, though.
So move the poll_wait() first in pipe_poll(), before you start looking
at the pipe state.
Fixes:
8cefc107ca54 ("pipe: Use head and tail pointers for the ring, not cursor and length")
Cc: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Patrick Steinhardt [Wed, 4 Dec 2019 06:13:22 +0000 (07:13 +0100)]
nfsd: depend on CRYPTO_MD5 for legacy client tracking
The legacy client tracking infrastructure of nfsd makes use of MD5 to
derive a client's recovery directory name. As the nfsd module doesn't
declare any dependency on CRYPTO_MD5, though, it may fail to allocate
the hash if the kernel was compiled without it. As a result, generation
of client recovery directories will fail with the following error:
NFSD: unable to generate recoverydir name
The explicit dependency on CRYPTO_MD5 was removed as redundant back in
6aaa67b5f3b9 (NFSD: Remove redundant "select" clauses in fs/Kconfig
2008-02-11) as it was already implicitly selected via RPCSEC_GSS_KRB5.
This broke when RPCSEC_GSS_KRB5 was made optional for NFSv4 in commit
df486a25900f (NFS: Fix the selection of security flavours in Kconfig) at
a later point.
Fix the issue by adding back an explicit dependency on CRYPTO_MD5.
Fixes:
df486a25900f (NFS: Fix the selection of security flavours in Kconfig)
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Olga Kornievskaia [Wed, 4 Dec 2019 20:13:54 +0000 (15:13 -0500)]
NFSD fixing possible null pointer derefering in copy offload
Static checker revealed possible error path leading to possible
NULL pointer dereferencing.
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Fixes:
e0639dc5805a: ("NFSD introduce async copy feature")
Signed-off-by: Olga Kornievskaia <kolga@netapp.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>