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firewire: ohci: add no MSI quirk for O2Micro controller
authorMing Lei <ming.lei@canonical.com>
Wed, 31 Aug 2011 02:45:46 +0000 (10:45 +0800)
committerGreg Kroah-Hartman <gregkh@suse.de>
Mon, 3 Oct 2011 18:40:33 +0000 (11:40 -0700)
commit3917a8efa50bc38ef2f2194a5e35c2062640feed
tree7e9bd1999d3298f5511febc66a1f04c63a8667d8
parent2e4caf2e0b5a96f5cfa838108a3a1b934cf7f4f7
firewire: ohci: add no MSI quirk for O2Micro controller

commit f39aa30d7741f40ad964341e9243dbbd7f8ff057 upstream.

This fixes https://bugs.launchpad.net/ubuntu/+source/linux/+bug/801719 .

An O2Micro PCI Express FireWire controller,
"FireWire (IEEE 1394) [0c00]: O2 Micro, Inc. Device [1217:11f7] (rev 05)"
which is a combination device together with an SDHCI controller and some
sort of storage controller, misses SBP-2 status writes from an attached
FireWire HDD.  This problem goes away if MSI is disabled for this
FireWire controller.

The device reportedly does not require QUIRK_CYCLE_TIMER.

Signed-off-by: Ming Lei <ming.lei@canonical.com>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
drivers/firewire/ohci.c