scsi: scsi_transport_fc: Add FPIN fc event codes

Add a new event type - an FPIN event.

Add a new routine, fc_host_fpin_rcv(), that lldd's call when an FPIN is
received. The routine processes the fpin payload.  For now, the routine
only logs an FPIN event.

Signed-off-by: Muneendra <muneendra.kumar@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Reviewed-by: Ewan D. Milne <emilne@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: scsi_transport_fc: refactor event posting routines

There are two routines generating transport events that do the same thing
with only a couple of values set differently.

Refactor so there's a single routine doing the netlink operations to send
the event. All the differences are passed as arguments. Export the symbol
so the generic routine can be called by llds.

Modify the existing two event routines to use the helper.

Signed-off-by: James Smart <jsmart2021@gmail.com>
Reviewed-by: Ewan D. Milne <emilne@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: fc: add FPIN ELS definition

T11 has introduced a new Fabric Notifications mechanism whereby the fabric
can notify a port of events occurring in the fabric.  The notifications are
given by the FPIN ELS.

Add the FPIN ELS definitions to the kernel.

Signed-off-by: James Smart <jsmart2021@gmail.com>
Reviewed-by: Ewan D. Milne <emilne@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: lpfc: Fix a recently introduced compiler warning

This patch avoids that the following compiler warning is reported with
CONFIG_NVME_FC=n:

drivers/scsi/lpfc/lpfc_nvme.c:2140:1: warning: 'lpfc_nvme_lport_unreg_wait' defined but not used [-Wunused-function]
 lpfc_nvme_lport_unreg_wait(struct lpfc_vport *vport,
 ^~~~~~~~~~~~~~~~~~~~~~~~~~

Fixes: 3999df75bccb ("scsi: lpfc: Declare local functions static")
Cc: James Smart <james.smart@broadcom.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Acked-by: James Smart <james.smart@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: qla2xxx: Remove useless set memory to zero use memset()

The memory return by kzalloc() has already be set to zero, so remove
useless memset(0).

Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: mptscsih: Mark expected switch fall-throughs

In preparation to enabling -Wimplicit-fallthrough, mark switch cases
where we are expecting to fall through.

This patch fixes the following warnings:

drivers/message/fusion/mptscsih.c: In function  mptscsih_io_done :
drivers/message/fusion/mptscsih.c:741:7: warning: this statement may fall through [-Wimplicit-fallthrough=]
    if ( ioc->bus_type == SAS ) {
       ^
drivers/message/fusion/mptscsih.c:790:3: note: here
   case MPI_IOCSTATUS_SCSI_TASK_TERMINATED: /* 0x0048 */
   ^~~~
drivers/message/fusion/mptscsih.c:884:4: warning: this statement may fall through [-Wimplicit-fallthrough=]
    scsi_set_resid(sc, 0);
    ^~~~~~~~~~~~~~~~~~~~~
drivers/message/fusion/mptscsih.c:885:3: note: here
   case MPI_IOCSTATUS_SCSI_RECOVERED_ERROR: /* 0x0040 */
   ^~~~

Warning level 3 was used: -Wimplicit-fallthrough=3

This patch is part of the ongoing efforts to enable
-Wimplicit-fallthrough.

Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: dt-bindings: ufs: Add VCC capability on MediaTek UFS driver

Add VCC supply for ufs-mediatek driver to provide power-saving operation
during low-power modes. For example VCC can be turned-off during system
suspend and turned-on after system is resumed.

Signed-off-by: Stanley Chu <stanley.chu@mediatek.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: dt-bindings: ufs: Remove custom property "<name>-fixed-regulator"

Custom device tree property "<name>-fixed-regulator" can be removed
because,

1) It is not used anywhere in tree.

2) All handlings for "<name>-fixed-regulator" have been removed in UFS
   driver.

3) There is no issue if an existed regulator defined
   "<name>-fixed-regulator" property in device tree.

Signed-off-by: Stanley Chu <stanley.chu@mediatek.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: ufs-cdns: Add support for UFSHCI with M31 PHY

This patch adds an additional PHY initialization, required for M31 PHY when
used with Cadence UFS HC.  A new compatible string has been added for this
purpose.

[mkp: nuke superfluous status return]

Signed-off-by: Jan Kotas <jank@cadence.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: dt-bindings: ufs-cdns: Update Cadence UFS compatibility list

This patch adds a new compatible string description for CDNS UFS HCD + M31
16nm PHY.

Signed-off-by: Jan Kotas <jank@cadence.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: ufs: remove unnecessary pointer evaluation

The pointer value is initialized as &hba->vreg_info, and it's never
changed. It's not necessary to check the pointer is null or not.

Signed-off-by: Zeng Guangyue <zengguangyue@hisilicon.com>
Acked-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: qedf: Remove set but not used variable 'fr_len'

Fixes gcc '-Wunused-but-set-variable' warning:

drivers/scsi/qedf/qedf_fip.c: In function 'qedf_fcoe_send_vlan_req':
drivers/scsi/qedf/qedf_fip.c:22:6: warning:
 variable 'fr_len' set but not used [-Wunused-but-set-variable]

It's never used since introduction and can be removed.

Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Acked-by: Manish Rangankar <mrangankar@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: pm8001: fix spelling mistake, interupt -> interrupt

Rename the functions pm8001_chip_is_our_interupt,
pm80xx_chip_is_our_interupt and function pointer is_our_interrupt to fix
spelling mistakes.

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Acked-by: Jack Wang <jinpu.wang@cloud.ionos.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: pm8001: clean up dead code when PM8001_USE_MSIX is defined

When macro PM8001_USE_MSIX is defined there are redundant dead code calls
to pm8001_chip_intx_interrupt_{enable|disable} and pm8001_cr32.

Clean this up for the defined PM8001_USE_MSIX and undefined
PM8001_USE_MSIX cases.

[mkp: squashed two patches]

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Acked-by: Jack Wang <jinpu.wang@cloud.ionos.com>
Reviewed-by: Mukesh Ojha <mojha@codeaurora.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: qla2xxx: Update driver version to 10.01.00.16-k

Signed-off-by: Himanshu Madhani <hmadhani@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: qla2xxx: Change abort wait_loop from msleep to wait_event_timeout

This patch converts driver wait time from using msleep to
wair_event_timeout to prevent race condition.

Signed-off-by: Giridhar Malavali <gmalavali@marvell.com>
Signed-off-by: Himanshu Madhani <hmadhani@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: qla2xxx: Fix driver unload when FC-NVMe LUNs are connected

This patch allows driver to unload using "modprobe -r" when FC-NVMe LUNs
are connected.

Signed-off-by: Giridhar Malavali <gmalavali@marvell.com>
Signed-off-by: Himanshu Madhani <hmadhani@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: qla2xxx: Cleanup redundant qla2x00_abort_all_cmds during unload

This patch removes redundant qla2x00_abort_all_cmds() during driver unload.

Signed-off-by: Anil Gurumurthy <agurumurthy@marvell.com>
Signed-off-by: Himanshu Madhani <hmadhani@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: qla2xxx: Set remote port devloss timeout to 0

This patch sets remote_port_devloss value to 0. This indicates to FC-NVMe
transport that driver is unloading and transport should not retry.

Fixes: e476fe8af5ff ("scsi: qla2xxx: Fix unload when NVMe devices are configured")
Cc: stable@vger.kernel.org
Signed-off-by: Giridhar Malavali <gmalavali@marvell.com>
Signed-off-by: Himanshu Madhani <hmadhani@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: qla2xxx: Cleanup fcport memory to prevent leak

Clean up fcport list and loopid in one place and iterate through for loop.

Signed-off-by: Quinn Tran <qtran@marvell.com>
Signed-off-by: Himanshu Madhani <hmadhani@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: qla2xxx: Use mutex protection during qla2x00_sysfs_read_fw_dump()

Add mutex protection to prevent driver from freeing the FW dump buffer
while the extraction is in progress.

[mkp: commit desc]

Signed-off-by: Quinn Tran <quinn.tran@cavium.com>
Signed-off-by: Himanshu Madhani <hmadhani@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: qla2xxx: Fix fw dump corruption

If fw dump buffer size changes and there is an existing fw dump, then save
the old dump in the newly allocated buffer.

Signed-off-by: Quinn Tran <quinn.tran@cavium.com>
Signed-off-by: Himanshu Madhani <hmadhani@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: qla2xxx: Further limit FLASH region write access from SysFS

Recent ISPs have larger and more complex flash-write semantics
(secure-access and signing). The BSG interfaces support these semantics for
all ISPs and is exclusively used by QLogic user-space tools. Limit
flash-write operations to ISPs <= 25xx.

Signed-off-by: Andrew Vasquez <andrewv@marvell.com>
Signed-off-by: Himanshu Madhani <hmadhani@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: qla2xxx: Fix incorrect region-size setting in optrom SYSFS routines

Commit e6f77540c067 ("scsi: qla2xxx: Fix an integer overflow in sysfs
code") incorrectly set 'optrom_region_size' to 'start+size', which can
overflow option-rom boundaries when 'start' is non-zero.  Continue setting
optrom_region_size to the proper adjusted value of 'size'.

Fixes: e6f77540c067 ("scsi: qla2xxx: Fix an integer overflow in sysfs code")
Cc: stable@vger.kernel.org
Signed-off-by: Andrew Vasquez <andrewv@marvell.com>
Signed-off-by: Himanshu Madhani <hmadhani@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: qla2xxx: Disable T10-DIF feature with FC-NVMe during probe

With FC-NVMe enabled, driver does not support T10 DIF/DIX.  This patch
disables T10-PI information when ql2xnvmeenable is set.

Signed-off-by: Giridhar Malavali <gmalavali@marvell.com>
Signed-off-by: Himanshu Madhani <hmadhani@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: qla2xxx: Increase the max_sgl_segments to 1024

This patch increases max_sgl_segments value from 128 to the maximum
supported which is 1024. Increasing max_sgl_segments will allow the driver
to support larger I/O sizes

[mkp: commit desc tweak]

Signed-off-by: Giridhar Malavali <gmalavali@marvell.com>
Signed-off-by: Himanshu Madhani <hmadhani@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: qla2xxx: Reset the FCF_ASYNC_{SENT|ACTIVE} flags

Driver maintains state machine for processing and completing switch
commands. This patch resets FCF_ASYNC_{SENT|ACTIVE} flag to indicate if the
previous command is active or sent, in order for next GPSC command to
advance the state machine.

[mkp: commit desc typo]

Signed-off-by: Giridhar Malavali <gmalavali@marvell.com>
Signed-off-by: Himanshu Madhani <hmadhani@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: qla2xxx: Set the qpair in SRB to NULL when SRB is released

This patch sets QPair pointer to NULL to prevent abort command racing ahead
of normal command completion handling during scsi_done call.

Signed-off-by: Giridhar Malavali <gmalavali@marvell.com>
Signed-off-by: Himanshu Madhani <hmadhani@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: qla2xxx: Set the SCSI command result before calling the command done

This patch tries to address race condition between abort handler and
completion handler. When scsi command result is set by both abort and
completion handler, scsi_done() is only called after refcount on SRB
structure goes to zero. The abort handler sets this result prematurely even
when the refcount is non-zero value. Fix this by setting SCSI cmd->result
before scsi_done() is called.

Signed-off-by: Giridhar Malavali <gmalavali@marvell.com>
Signed-off-by: Himanshu Madhani <hmadhani@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: lpfc: Change smp_processor_id() into raw_smp_processor_id()

This patch avoids that a kernel warning appears when smp_processor_id() is
called with preempt debugging enabled.

Cc: James Smart <james.smart@broadcom.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Acked-by: James Smart <james.smart@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: lpfc: Remove unused functions

Remove those functions that are not called from outside the removed
functions.

Cc: James Smart <james.smart@broadcom.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Acked-by: James Smart <james.smart@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: lpfc: Remove set-but-not-used variables

This patch does not change any functionality but avoids that the compiler
complains about set-but-not-used variables when building with W=1.

Cc: James Smart <james.smart@broadcom.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Acked-by: James Smart <james.smart@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: lpfc: Move trunk_errmsg[] from a header file into a .c file

Arrays should be defined in .c files instead of in a header file. This
patch reduces the size of the lpfc kernel module.

Cc: James Smart <james.smart@broadcom.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Acked-by: James Smart <james.smart@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: lpfc: Annotate switch/case fall-through

This patch avoids that the compiler warns about missing fall-through
annotation when building with W=1.

Cc: James Smart <james.smart@broadcom.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Acked-by: James Smart <james.smart@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: lpfc: Fix indentation and balance braces

This patch avoid that smatch complains about misleading indentation.

Cc: James Smart <james.smart@broadcom.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Acked-by: James Smart <james.smart@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: lpfc: Declare local functions static

This patch avoids that the compiler complains about missing declarations
when building with W=1.

Cc: James Smart <james.smart@broadcom.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Acked-by: James Smart <james.smart@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: ufs: Remove "<name>-fixed-regulator" device tree property

"<name>-fixed-regulator" device tree property can be safely removed because
below things are fixed or resolved,

1. "<name>-max-microamp" becomes optional property: Undefined
   "<name>-max-microamp" will not cause initialization fail if
   "<name>-fixed-regulator" is not defined.

2. Current switching operation (by regulator_set_load) now has rules:
   Regulators will have undefined current limit if "<name>-fixed-regulator"
   is not defined. But this is safe because only regulator which has
   configured current limit from "<name>-max-microamp" property is allowed
   to change its load.

Although "<name>-fixed-regulator" is not used in any dt-bindings in tree,
this patch is still safe for regulators already defined
"<name>-fixed-regulator". To be more clear, if a regulator defined
"<name>-fixed-regulator" before, the behavior difference after this patch
is,

1. "<name>-max-microamp":
   If a regulator defined "<name>-fixed-regulator", it is not necessary
   to define "<name>-max-microamp" property in device tree and it is
   expected to have an undefined current limit, i.e., "max_uA" field
   is zero in struct ufs_vreg. This is exactly the same as patched.

2. "vcc-supply-1p8" or volatge range settings:
   * For vcc, vccq or vccq2, these three regulators shall not define
     "<name>-fixed-regulator" because defining it will lead to
     undefined voltage range and thus voltage switching will be
     unexpected.
   * For other regulators with undefined voltage range, voltage range
     will be still undefined after patched.

Therefore this patch is safe for all existed regulators with
"<name>-fixed-regulator" property already defined.

Signed-off-by: Stanley Chu <stanley.chu@mediatek.com>
Reviewed-by: Avri Altman <avri.altman@wdc.com>
Acked-by: Alim Akhtar <alim.akhtar@samsung.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: ufs: Change "<name>-max-microamp" to non-mandatory property

In dt-bindings for ufs, "<name>-max-microamp" property indicates current
limit and is mandatory if "<name>-fixed-regulator" is not defined on a
specified regulator.

However, in some platforms, regulators without "<name>-fixed-regulator"
property may not need to define their current limit because they may want
to define voltage range only for proper voltage switching in different
power modes, especially for vcc, vccq or vccq2.

Currently missing "<name>-max-microamp" property in device tree will lead
initialization to fail, thus such limitation shall be resolved to tolerate
this kind of regulators.

After resolving this, regulators without "<name>-max-microamp" property
will have undefined "max current" value, i.e., zero value in "max_uA" field
in struct ufs_vreg. Because we do bypass current switching operation (by
regulator_set_load) in case of undefined current limit, this patch shall be
safe.

Signed-off-by: Stanley Chu <stanley.chu@mediatek.com>
Reviewed-by: Avri Altman <avri.altman@wdc.com>
Acked-by: Alim Akhtar <alim.akhtar@samsung.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: ufs: Fix regulator load and icc-level configuration

Currently if a regulator has "<name>-fixed-regulator" property in device
tree, it will skip current limit initialization.  This lead to a zero
"max_uA" value in struct ufs_vreg.

However, "regulator_set_load" operation shall be required on regulators
which have valid current limits, otherwise a zero "max_uA" set by
"regulator_set_load" may cause unexpected behavior when this regulator is
enabled or set as high power mode.

Similarly, in device's icc_level configuration flow, the target icc_level
shall be updated if regulator also has valid current limit, otherwise a
wrong icc_level will be calculated by zero "max_uA" and thus causes
unexpected results after it is written to device.

Signed-off-by: Stanley Chu <stanley.chu@mediatek.com>
Reviewed-by: Avri Altman <avri.altman@wdc.com>
Acked-by: Alim Akhtar <alim.akhtar@samsung.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: ufs: Avoid configuring regulator with undefined voltage range

For regulators used by UFS, vcc, vccq and vccq2 will have voltage range
initialized by ufshcd_populate_vreg(), however other regulators may have
undefined voltage range if dt-bindings have no such definition.

In above undefined case, both "min_uV" and "max_uV" fields in ufs_vreg
struct will be zero values and these values will be configured on
regulators in different power modes.

Currently this may have no harm if both "min_uV" and "max_uV" always keep
"zero values" because regulator_set_voltage() will always bypass such
invalid values and return "good" results.

However improper values shall be fixed to avoid potential bugs.  Simply
bypass voltage configuration if voltage range is not defined.

Signed-off-by: Stanley Chu <stanley.chu@mediatek.com>
Reviewed-by: Avri Altman <avri.altman@wdc.com>
Acked-by: Alim Akhtar <alim.akhtar@samsung.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: ufs: Remove unused min_uA field in struct ufs_vreg

There are two fields related to regulator current limit in struct ufs_vreg:
"min_uA" and "max_uA".

"max_uA" is probed by "<name>-max-microamp" property from device tree and
used for

 - regulator_set_load operations
 - icc_level configuration in device

However "min_uA" field is not used anywhere, thus we can remove it.

Signed-off-by: Stanley Chu <stanley.chu@mediatek.com>
Reviewed-by: Marc Gonzalez <marc.w.gonzalez@free.fr>
Reviewed-by: Avri Altman <avri.altman@wdc.com>
Acked-by: Alim Akhtar <alim.akhtar@samsung.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: bnx2fc: remove unneeded variable

The rc variable is not needed in bnx2fc_abts_cleanup(). Remove it and
just return SUCCESS.

[mkp: commit desc]

Signed-off-by: Ding Xiang <dingxiang@cmss.chinamobile.com>
Acked-by: Manish Rangankar <mrangankar@marvell.com>
Reviewed-by: Mukesh Ojha <mojha@codeaurora.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: qedf: Update the driver version to 8.37.25.19

 - Update the driver version.

Signed-off-by: Saurav Kashyap <skashyap@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: qedf: Fix lport may be used uninitialized warning

 - lport was getting used without initialization, initialize it to fix a
   warning.

Signed-off-by: Saurav Kashyap <skashyap@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: qedf: Correctly handle refcounting of rdata

 - Handle refcount of rdata during error conditions.

Signed-off-by: Saurav Kashyap <skashyap@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: qedf: Cleanup rrq_work after QEDF_CMD_OUTSTANDING is cleared

Here is the relevant logs for the problem we are solving:

qedf_flush_active_ios:1707]:3: Flush active i/o's num=0x17 fcport=0xffff948168fbcc80 port_id=0x550200 scsi_id=0.
qedf_flush_active_ios:1708]:3: Locking flush mutex.
qedf_flush_active_ios:1758]:3: Not outstanding, xid=0xaaf, cmd_type=3 refcount=1.
qedf_flush_active_ios:1896]:3: Flushed 0x16 I/Os, active=0x1.
qedf_flush_active_ios:1901]:3: Flushed 0x16 I/Os, active=0x1 cnt=60.
qedf_send_rrq:295]:3: Sending RRQ orig io = ffffb48b8f7d7158, orig_xid = 0xaaf
qedf_initiate_els:37]:3: Sending ELS
qedf_initiate_els:68]:3: initiate_els els_req = 0xffffb48b8f6d3098 cb_arg = ffff948fd5e4de80 xid = 4c6
qedf_init_mp_req:2172]:3: Entered.
qedf_init_mp_task:727]:3: Initializing MP task for cmd_type=4
qedf_initiate_els:134]:3: Ringing doorbell for ELS req
qedf_flush_active_ios:1901]:3: Flushed 0x16 I/Os, active=0x2 cnt=20.
qedf_cmd_timeout:96]:3: ELS timeout, xid=0x4c6.
qedf_rrq_compl:186]:3: Entered.
qedf_rrq_compl:204]:3: rrq_compl: orig io = ffffb48b8f7d7158, orig xid = 0xaaf, rrq_xid = 0x4c6, refcount=1
qedf_flush_active_ios:1935]:3: Unlocking flush mutex.
qedf_upload_connection:1579]:3: Uploading connection port_id=550200.

We found an ABTS command for which CMD_OUTSTANDING was cleared (line 3).
For this command, delayed send_rrq was queued, but would take 10 secs to
execute.  Adding capability to detect that (based on io_req->state that is
being introduced), and attempt to cancel rrq_work. If we succeed, we drop
the reference and free the io_req. If we cannot, then the els will get sent
out and we will wait for 10 secs for it to complete.

Signed-off-by: Shyam Sundar <ssundar@marvell.com>
Signed-off-by: Saurav Kashyap <skashyap@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: qedf: Check for tm_flags instead of cmd_type during cleanup

cmd_type is over written to QEDF_CLEANUP during cleanup, so check for
tm_flags.

Signed-off-by: Saurav Kashyap <skashyap@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: qedf: Add a flag to help debugging io_req which could not be cleaned

 - The flag will help in to figure out if io_req is cleaned or not.

Signed-off-by: Shyam Sundar <ssundar@marvell.com>
Signed-off-by: Saurav Kashyap <skashyap@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: qedf: Don't send ABTS for under run scenario

 - Command is already completed with underrun so no need to send ABTS.

Signed-off-by: Saurav Kashyap <skashyap@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: qedf: Don't queue anything if upload is in progress

 - I/Os, aborts and tmf should not be queued if flush is in progress.

Signed-off-by: Shyam Sundar <ssundar@marvell.com>
Signed-off-by: Saurav Kashyap <skashyap@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: qedf: Check both the FCF and fabric ID before servicing clear virtual link

 - Check proper values before servicing CVL.

Signed-off-by: Chad Dupuis <cdupuis@marvell.com>
Signed-off-by: Saurav Kashyap <skashyap@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: qedf: fc_rport_priv reference counting fixes

The fc_rport_priv structure is reference counted, so we need to ensure that
the reference is increased before accessing the structure.

Signed-off-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Saurav Kashyap <skashyap@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: qedf: Add missing return in qedf_scsi_done()

On completions where we do not have a bad scsi_cmnd pointer we should
return before the the label lest we do a double kref_put.

Signed-off-by: Chad Dupuis <cdupuis@marvell.com>
Signed-off-by: Saurav Kashyap <skashyap@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: qedf: Wait for upload and link down processing during soft ctx reset

 - Wait for all the connections to get uploaded.

Signed-off-by: Chad Dupuis <cdupuis@marvell.com>
Signed-off-by: Saurav Kashyap <skashyap@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: qedf: Add additional checks for io_req->sc_cmd validity

 - Check the validity of various pointers before processing.

Signed-off-by: Chad Dupuis <cdupuis@marvell.com>
Signed-off-by: Saurav Kashyap <skashyap@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: qedf: fixup bit operations

test_bit() is atomic, test_bit() || test_bit() is not. So protect
consecutive bit tests with a lock to avoid races.

Signed-off-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Saurav Kashyap <skashyap@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: qedf: fixup locking in qedf_restart_rport()

fc_rport_create() needs to be called with disc_mutex held.  And we should
re-assign the 'rdata' pointer in case it got changed.

Signed-off-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Saurav Kashyap <skashyap@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: qedf: missing kref_put in qedf_xmit()

qedf_xmit() calls fc_rport_lookup(), but discards the returned rdata
structure almost immediately without decreasing the refcount.  This leads
to a refcount leak and the rdata never to be freed.

Signed-off-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Saurav Kashyap <skashyap@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: qedf: Check for link state before processing LL2 packets and send fipvlan retries

 - Check if link is UP before sending and processing any packets on wire.

Signed-off-by: Saurav Kashyap <skashyap@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: qedf: Add missing fc_disc_init call after allocating lport

When receiving an unsolicited frame we could crash on a list traversal in
fc_rport_lookup while searching the rport which is associated with our
lport.

Initialize the lport's discovery node after allocating the lport in
__qedf_probe().

Signed-off-by: Chad Dupuis <cdupuis@marvell.com>
Signed-off-by: Saurav Kashyap <skashyap@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: qedf: Correct the memory barriers in qedf_ring_doorbell

 - Correct memory barriers to make sure all cmnds are flushed.

Signed-off-by: Andrew Vasquez <andrewv@marvell.com>
Signed-off-by: Saurav Kashyap <skashyap@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: qedf: Use a separate completion for cleanup commands

 - If a TMF and cleanup are issued at the same time they could cause a call
   trace if issued against the same xid as the io_req->tm_done completion
   is used for both.

 - Set and clear cleanup bit in cleanup routine.

Signed-off-by: Chad Dupuis <cdupuis@marvell.com>
Signed-off-by: Saurav Kashyap <skashyap@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: qedf: Modify abort and tmf handler to handle edge condition and flush

An I/O can be in any state when flush is called, it can be in abort,
waiting for abort, RRQ send and waiting or TMF send.

 - HZ can be different on different architecture, correctly set abort
   timeout value.

 - Flush can complete the I/Os prematurely, handle refcount for aborted
   I/Os and for which RRQ is pending.

 - Differentiate LUN/TARGET reset, as cleanup needs to be send to firmware
   accordingly.

 - Add flush mutex to sync cleanup call from abort and flush routine.

 - Clear abort/outstanding bit on timeout.

Signed-off-by: Shyam Sundar <shyam.sundar@marvell.com>
Signed-off-by: Chad Dupuis <cdupuis@marvell.com>
Signed-off-by: Saurav Kashyap <skashyap@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: qedf: Modify flush routine to handle all I/Os and TMF

The purpose of flush routine is to cleanup I/Os to the firmware and
complete them to scsi middle layer. This routine is invoked before
connection is uploaded because of rport going away.

 - Don't process any I/Os, aborts, TMFs coming when flush in progress.

 - Add flags to handle cleanup and release of I/Os because flush can
   prematurely complete I/Os.

 - Original command can get completed to driver when cleanup for same is
   posted to firmware, handle this condition.

 - Modify flush to handle I/Os in all the states like abort, TMF, RRQ and
   timeouts.

Signed-off-by: Shyam Sundar <ssundar@marvell.com>
Signed-off-by: Chad Dupuis <cdupuis@marvell.com>
Signed-off-by: Saurav Kashyap <skashyap@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: qedf: Simplify s/g list mapping

When mapping the pages from a scatter/gather list from the SCSI layer we
only need to follow these rules:

 - Max SGEs for each I/O request is 256
 - No size limit on each SGE
 - No need to split OS provided SGEs to 4K before sending to firmware.
 - Slow SGE is applicable only when:
   - There are > 8 SGEs and any middle SGE is less than a page size (4K)

Make necessary changes so that driver follows these rules. Applicable only
for Write requests (not for Read requests). No need to check SGE address
alignment requirements (first, middle or last) before declaring slow SGE.

Signed-off-by: Chad Dupuis <cdupuis@marvell.com>
Signed-off-by: Saurav Kashyap <skashyap@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: qedf: Add missing return in qedf_post_io_req() in the fcport offload check

Fixes the following crash as the return was missing from the check if an
fcport is offloaded. If we hit this code we continue to try to post an
invalid task which can lead to the crash:

[30259.616411] [0000:61:00.3]:[qedf_post_io_req:989]:3: Session not offloaded yet.
[30259.616413] [0000:61:00.3]:[qedf_upload_connection:1340]:3: Uploading connection port_id=490020.
[30259.623769] BUG: unable to handle kernel NULL pointer dereference at 0000000000000198
[30259.631645] IP: [<ffffffffc035b1ed>] qedf_init_task.isra.16+0x3d/0x450 [qedf]
[30259.638816] PGD 0
[30259.640841] Oops: 0000 [#1] SMP
[30259.644098] Modules linked in: fuse xt_CHECKSUM iptable_mangle ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_nat_ipv4 nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack ipt_REJECT nf_reject_ipv4 tun bridge stp llc ebtable_filter ebtables devlink ip6table_filter ip6_tables iptable_filter vfat fat ib_isert iscsi_target_mod ib_srpt target_core_mod ib_srp scsi_transport_srp ib_ipoib ib_ucm ib_umad dm_service_time skx_edac intel_powerclamp coretemp intel_rapl iosf_mbi kvm_intel kvm irqbypass crc32_pclmul ghash_clmulni_intel aesni_intel rpcrdma sunrpc rdma_ucm ib_uverbs lrw gf128mul ib_iser rdma_cm iw_cm ib_cm libiscsi scsi_transport_iscsi qedr(OE) glue_helper ablk_helper cryptd ib_core dm_round_robin joydev pcspkr ipmi_ssif ses enclosure ipmi_si ipmi_devintf ipmi_msghandler mei_me
[30259.715529]  mei sg hpilo hpwdt shpchp wmi lpc_ich acpi_power_meter dm_multipath ip_tables xfs libcrc32c sd_mod crc_t10dif crct10dif_generic uas usb_storage mgag200 qedf(OE) i2c_algo_bit libfcoe drm_kms_helper libfc syscopyarea sysfillrect scsi_transport_fc qede(OE) sysimgblt fb_sys_fops ptp ttm pps_core drm qed(OE) smartpqi crct10dif_pclmul crct10dif_common crc32c_intel i2c_core scsi_transport_sas scsi_tgt dm_mirror dm_region_hash dm_log dm_mod
[30259.754237] CPU: 9 PID: 977 Comm: kdmwork-253:7 Kdump: loaded Tainted: G        W  OE  ------------   3.10.0-862.el7.x86_64 #1
[30259.765664] Hardware name: HPE Synergy 480 Gen10/Synergy 480 Gen10 Compute Module, BIOS I42 04/04/2018
[30259.775000] task: ffff8c801efd0000 ti: ffff8c801efd8000 task.ti: ffff8c801efd8000
[30259.782505] RIP: 0010:[<ffffffffc035b1ed>]  [<ffffffffc035b1ed>] qedf_init_task.isra.16+0x3d/0x450 [qedf]
[30259.792116] RSP: 0018:ffff8c801efdbbb0  EFLAGS: 00010046
[30259.797444] RAX: 0000000000000000 RBX: ffffa7f1450948d8 RCX: ffff8c7fe5bc40c8
[30259.804600] RDX: ffff8c800715b300 RSI: ffffa7f1450948d8 RDI: ffff8c80169c2480
[30259.811755] RBP: ffff8c801efdbc30 R08: 00000000000000ae R09: ffff8c800a314540
[30259.818911] R10: ffff8c7fe5bc40c8 R11: ffff8c801efdb8ae R12: 0000000000000000
[30259.826068] R13: ffff8c800715b300 R14: ffff8c80169c2480 R15: ffff8c8005da28e0
[30259.833223] FS:  0000000000000000(0000) GS:ffff8c803f840000(0000) knlGS:0000000000000000
[30259.841338] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[30259.847100] CR2: 0000000000000198 CR3: 000000081242e000 CR4: 00000000007607e0
[30259.854256] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[30259.861412] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[30259.868568] PKRU: 00000000
[30259.871278] Call Trace:
[30259.873737]  [<ffffffffc035c948>] qedf_post_io_req+0x148/0x680 [qedf]
[30259.880201]  [<ffffffffc035d070>] qedf_queuecommand+0x1f0/0x240 [qedf]
[30259.886749]  [<ffffffffa329b050>] scsi_dispatch_cmd+0xb0/0x240
[30259.892600]  [<ffffffffa32a45bc>] scsi_request_fn+0x4cc/0x680
[30259.898364]  [<ffffffffa3118ad9>] __blk_run_queue+0x39/0x50
[30259.903954]  [<ffffffffa3114393>] __elv_add_request+0xd3/0x260
[30259.909805]  [<ffffffffa311baf0>] blk_insert_cloned_request+0xf0/0x1b0
[30259.916358]  [<ffffffffc010b622>] map_request+0x142/0x220 [dm_mod]
[30259.922560]  [<ffffffffc010b716>] map_tio_request+0x16/0x40 [dm_mod]
[30259.928932]  [<ffffffffa2ebb1f5>] kthread_worker_fn+0x85/0x180
[30259.934782]  [<ffffffffa2ebb170>] ? kthread_stop+0xf0/0xf0
[30259.940284]  [<ffffffffa2ebae31>] kthread+0xd1/0xe0
[30259.945176]  [<ffffffffa2ebad60>] ? insert_kthread_work+0x40/0x40
[30259.951290]  [<ffffffffa351f61d>] ret_from_fork_nospec_begin+0x7/0x21
[30259.957750]  [<ffffffffa2ebad60>] ? insert_kthread_work+0x40/0x40
[30259.963860] Code: fe 41 55 49 89 d5 41 54 53 48 89 f3 48 83 ec 58 4c 8b 67 28 4c 8b 4e 18 65 48 8b 04 25 28 00 00 00 48 89 45 d0 31 c0 4c 8b 7e 58 <49> 8b 84 24 98 01 00 00 48 8b 00 f6 80 31 01 00 00 10 0f 85 0b
[30259.983372] RIP  [<ffffffffc035b1ed>] qedf_init_task.isra.16+0x3d/0x450 [qedf]
[30259.990630]  RSP <ffff8c801efdbbb0>
[30259.994127] CR2: 0000000000000198

Signed-off-by: Chad Dupuis <cdupuis@marvell.com>
Signed-off-by: Saurav Kashyap <skashyap@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: qedf: Correct xid range overlap between offloaded requests and libfc requests

There is currently an overlap where exchange IDs between what is used for
offloaded commands and by libfc for ELS commands.  Correct this so that
exchange ID range is:

Offloaded requests: 0 to 0xfff
libfc requests: 0x1000 to 0xfffe

Signed-off-by: Chad Dupuis <cdupuis@marvell.com>
Signed-off-by: Saurav Kashyap <skashyap@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: qedf: Do not retry ELS request if qedf_alloc_cmd fails

If we cannot allocate an ELS middlepath request, simply fail instead of
trying to delay and then reallocate.  This delay logic is causing soft
lockup messages:

NMI watchdog: BUG: soft lockup - CPU#2 stuck for 22s! [kworker/2:1:7639]
Modules linked in: xt_CHECKSUM ipt_MASQUERADE nf_nat_masquerade_ipv4 tun devlink ip6t_rpfilter ipt_REJECT nf_reject_ipv4 ip6t_REJECT nf_reject_ipv6 xt_conntrack ip_set nfnetlink ebtable_nat ebtable_broute bridge stp llc ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv6 ip6table_mangle ip6table_security ip6table_raw iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack iptable_mangle iptable_security iptable_raw ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter dm_service_time vfat fat rpcrdma sunrpc ib_isert iscsi_target_mod ib_iser libiscsi scsi_transport_iscsi ib_srpt target_core_mod ib_srp scsi_transport_srp ib_ipoib rdma_ucm ib_ucm ib_uverbs ib_umad rdma_cm ib_cm iw_cm sb_edac intel_powerclamp coretemp intel_rapl iosf_mbi kvm_intel kvm
irqbypass crc32_pclmul ghash_clmulni_intel aesni_intel lrw gf128mul glue_helper ablk_helper cryptd iTCO_wdt iTCO_vendor_support qedr(OE) ib_core joydev ipmi_ssif pcspkr hpilo hpwdt sg ipmi_si ipmi_devintf ipmi_msghandler ioatdma shpchp lpc_ich wmi dca acpi_power_meter dm_multipath ip_tables xfs libcrc32c sd_mod crc_t10dif crct10dif_generic qedf(OE) libfcoe mgag200 libfc i2c_algo_bit drm_kms_helper scsi_transport_fc qede(OE) syscopyarea sysfillrect sysimgblt fb_sys_fops ttm qed(OE) drm crct10dif_pclmul e1000e crct10dif_common crc32c_intel scsi_tgt hpsa i2c_core ptp scsi_transport_sas pps_core dm_mirror dm_region_hash dm_log dm_mod
CPU: 2 PID: 7639 Comm: kworker/2:1 Kdump: loaded Tainted: G           OEL ------------   3.10.0-861.el7.x86_64 #1
Hardware name: HP ProLiant DL580 Gen9/ProLiant DL580 Gen9, BIOS U17 07/21/2016
Workqueue: qedf_2_dpc qedf_handle_rrq [qedf]
task: ffff959edd628fd0 ti: ffff959ed6f08000 task.ti: ffff959ed6f08000
RIP: 0010:[<ffffffff8355913a>]  [<ffffffff8355913a>] delay_tsc+0x3a/0x60
RSP: 0018:ffff959ed6f0bd30  EFLAGS: 00000246
RAX: 000000008ef5f791 RBX: 5f646d635f666465 RCX: 0000025b8ededa2f
RDX: 000000000000025b RSI: 0000000000000002 RDI: 0000000000217d1e
RBP: ffff959ed6f0bd30 R08: ffffffffc079aae8 R09: 0000000000000200
R10: ffffffffc07952c6 R11: 0000000000000000 R12: 6c6c615f66646571
R13: ffff959ed6f0bcc8 R14: ffff959ed6f0bd08 R15: ffff959e00000028
FS:  0000000000000000(0000) GS:ffff959eff480000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4117fa1eb0 CR3: 0000002039e66000 CR4: 00000000003607e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
[<ffffffff8355907d>] __const_udelay+0x2d/0x30
[<ffffffffc079444a>] qedf_initiate_els+0x13a/0x450 [qedf]
[<ffffffffc0794210>] ? qedf_srr_compl+0x2a0/0x2a0 [qedf]
[<ffffffffc0795337>] qedf_send_rrq+0x127/0x230 [qedf]
[<ffffffffc078ed55>] qedf_handle_rrq+0x15/0x20 [qedf]
[<ffffffff832b2dff>] process_one_work+0x17f/0x440
[<ffffffff832b3ac6>] worker_thread+0x126/0x3c0
[<ffffffff832b39a0>] ? manage_workers.isra.24+0x2a0/0x2a0
[<ffffffff832bae31>] kthread+0xd1/0xe0
[<ffffffff832bad60>] ? insert_kthread_work+0x40/0x40
[<ffffffff8391f637>] ret_from_fork_nospec_begin+0x21/0x21
[<ffffffff832bad60>] ? insert_kthread_work+0x40/0x40

Signed-off-by: Chad Dupuis <cdupuis@marvell.com>
Signed-off-by: Saurav Kashyap <skashyap@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: MAINTAINERS: Add maintainer for MediaTek UFS driver

Signed-off-by: Stanley Chu <stanley.chu@mediatek.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: qla2xxx: Simplify conditional check again

Clang warns when it sees a logical not on the left side of a conditional
statement because it thinks the logical not should be applied to the whole
statement, not just the left side:

drivers/scsi/qla2xxx/qla_nx.c:3703:7: warning: logical not is only
applied to the left hand side of this comparison
[-Wlogical-not-parentheses]

This particular instance was already fixed by commit 0bfe7d3cae58 ("scsi:
qla2xxx: Simplify conditional check") upstream but it was reintroduced by
commit 3695310e37b4 ("scsi: qla2xxx: Update flash read/write routine") in
the 5.2/scsi-queue.

Fixes: 3695310e37b4 ("scsi: qla2xxx: Update flash read/write routine")
Link: https://github.com/ClangBuiltLinux/linux/issues/80
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: sd: Inline sd_probe_part2()

Make sd_probe() easier to read by inlining sd_probe_part2(). This patch
does not change any functionality.

Cc: Lee Duncan <lduncan@suse.com>
Cc: Hannes Reinecke <hare@suse.com>
Cc: Luis Chamberlain <mcgrof@kernel.org>
Cc: Johannes Thumshirn <jthumshirn@suse.de>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: sd: Rely on the driver core for asynchronous probing

As explained during the 2018 LSF/MM session about increasing SCSI disk
probing concurrency, the problems with the current probing approach are as
follows:

- The driver core is unaware of asynchronous SCSI LUN probing.
  wait_for_device_probe() waits for all asynchronous probes except
  asynchronous SCSI disk probes.

- There is unnecessary serialization between sd_probe() and sd_remove().
  This can lead to a deadlock.

Hence this patch that modifies the sd driver such that it uses the driver
core framework for asynchronous probing. The async domains and
get_device()/put_device() pairs that became superfluous due to this change
are removed.

This patch does not affect the time needed for loading the scsi_debug
kernel module with parameters delay=0 and max_luns=256.

This patch depends on commit ef0ff68351be ("driver core: Probe devices
asynchronously instead of the driver") that went upstream in kernel version
v5.1-rc1.

Cc: Lee Duncan <lduncan@suse.com>
Cc: Hannes Reinecke <hare@suse.com>
Cc: Luis Chamberlain <mcgrof@kernel.org>
Cc: Johannes Thumshirn <jthumshirn@suse.de>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: mpt3sas: fix indentation issue

There are a couple of statements that are incorrectly indented, fix these.

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: libcxgbi: remove uninitialized variable len

The variable len is not being inintialized and the uninitialized value is
being returned. However, this return path is never reached because the
default case in the switch statement returns -ENOSYS.  Clean up the code by
replacing the return -ENOSYS with a break for the default case and
returning -ENOSYS at the end of the function.  This allows len to be
removed.

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: target: alua: fix the tg_pt_gps_count

Reducing the count should be alua_tg_pt_gps_count instead of
alua_tg_pt_gps_counter when free alua group.

Signed-off-by: tangwenji <tang.wenji@zte.com.cn>
Reviewed-by: Mike Christie <mchristi@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: gdth: Only call dma_free_coherent when buf is not NULL in ioc_general

When building with -Wsometimes-uninitialized, Clang warns:

drivers/scsi/gdth.c:3662:6: warning: variable 'paddr' is used
uninitialized whenever 'if' condition is false
[-Wsometimes-uninitialized]

Don't attempt to call dma_free_coherent when buf is NULL (meaning that
we never called dma_alloc_coherent and initialized paddr), which avoids
this warning.

Link: https://github.com/ClangBuiltLinux/linux/issues/402
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: pm8001: remove set but not used variables 'param, sas_ha'

Fixes gcc '-Wunused-but-set-variable' warning:

drivers/scsi/pm8001/pm8001_hwi.c: In function 'mpi_smp_completion':
drivers/scsi/pm8001/pm8001_hwi.c:2901:6: warning:
 variable 'param' set but not used [-Wunused-but-set-variable]

drivers/scsi/pm8001/pm8001_hwi.c: In function 'pm8001_bytes_dmaed':
drivers/scsi/pm8001/pm8001_hwi.c:3247:24: warning:
 variable 'sas_ha' set but not used [-Wunused-but-set-variable]

They're never used since introduction, so can be removed.

Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Acked-by: Jack Wang <jinpu.wang@cloud.ionos.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: qla4xxx: avoid freeing unallocated dma memory

Clang -Wuninitialized notices that on is_qla40XX we never allocate any DMA
memory in get_fw_boot_info() but attempt to free it anyway:

drivers/scsi/qla4xxx/ql4_os.c:5915:7: error: variable 'buf_dma' is used uninitialized whenever 'if' condition is false
      [-Werror,-Wsometimes-uninitialized]
                if (!(val & 0x07)) {
                    ^~~~~~~~~~~~~
drivers/scsi/qla4xxx/ql4_os.c:5985:47: note: uninitialized use occurs here
        dma_free_coherent(&ha->pdev->dev, size, buf, buf_dma);
                                                     ^~~~~~~
drivers/scsi/qla4xxx/ql4_os.c:5915:3: note: remove the 'if' if its condition is always true
                if (!(val & 0x07)) {
                ^~~~~~~~~~~~~~~~~~~
drivers/scsi/qla4xxx/ql4_os.c:5885:20: note: initialize the variable 'buf_dma' to silence this warning
        dma_addr_t buf_dma;
                          ^
                           = 0

Skip the call to dma_free_coherent() here.

Fixes: 2a991c215978 ("[SCSI] qla4xxx: Boot from SAN support for open-iscsi")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Nathan Chancellor <natechancellor@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: lpfc: avoid uninitialized variable warning

clang -Wuninitialized incorrectly sees a variable being used without
initialization:

drivers/scsi/lpfc/lpfc_nvme.c:2102:37: error: variable 'localport' is uninitialized when used here
      [-Werror,-Wuninitialized]
                lport = (struct lpfc_nvme_lport *)localport->private;
                                                  ^~~~~~~~~
drivers/scsi/lpfc/lpfc_nvme.c:2059:38: note: initialize the variable 'localport' to silence this warning
        struct nvme_fc_local_port *localport;
                                            ^
                                             = NULL
1 error generated.

This is clearly in dead code, as the condition leading up to it is always
false when CONFIG_NVME_FC is disabled, and the variable is always
initialized when nvme_fc_register_localport() got called successfully.

Change the preprocessor conditional to the equivalent C construct, which
makes the code more readable and gets rid of the warning.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: James Smart <james.smart@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: lpfc: change snprintf to scnprintf for possible overflow

Change snprintf to scnprintf. There are generally two cases where using
snprintf causes problems.

1) Uses of size += snprintf(buf, SIZE - size, fmt, ...)
In this case, if snprintf would have written more characters than what the
buffer size (SIZE) is, then size will end up larger than SIZE. In later
uses of snprintf, SIZE - size will result in a negative number, leading
to problems. Note that size might already be too large by using
size = snprintf before the code reaches a case of size += snprintf.

2) If size is ultimately used as a length parameter for a copy back to user
space, then it will potentially allow for a buffer overflow and information
disclosure when size is greater than SIZE. When the size is used to index
the buffer directly, we can have memory corruption. This also means when
size = snprintf... is used, it may also cause problems since size may become
large.  Copying to userspace is mitigated by the HARDENED_USERCOPY kernel
configuration.

The solution to these issues is to use scnprintf which returns the number of
characters actually written to the buffer, so the size variable will never
exceed SIZE.

Signed-off-by: Silvio Cesare <silvio.cesare@gmail.com>
Signed-off-by: Willy Tarreau <w@1wt.eu>
Signed-off-by: James Smart <james.smart@broadcom.com>
Cc: Dick Kennedy <dick.kennedy@broadcom.com>
Cc: Dan Carpenter <dan.carpenter@oracle.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: ufs-mediatek: Add missing MODULE_* information

When building the ufs-mediatek module the following warning shows up:

WARNING: modpost: missing MODULE_LICENSE() in
  drivers/scsi/ufs/ufs-mediatek.o

Rework to add MODULE_LICENSE,MODULE_AUTHOR and MODULE_DESCRIPTION.

Fixes: ddd90623ce26 ("scsi: ufs-mediatek: Add UFS support for Mediatek SoC chips")
Signed-off-by: Anders Roxell <anders.roxell@linaro.org>
Reviewed-by: Stanley Chu <stanley.chu@mediatek.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: ufs-mediatek: Fix platform_no_drv_owner.cocci warnings

Remove .owner field if calls are used which set it automatically
Generated by: scripts/coccinelle/api/platform_no_drv_owner.cocci

Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Reviewed-by: Stanley Chu <stanley.chu@mediatek.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: target: iscsi: Free conn_ops when zalloc_cpumask_var failed

It should not free cpumask but free conn->conn_ops when zalloc_cpumask_var
failed.

Signed-off-by: tangwenji <tang.wenji@zte.com.cn>
Reviewed-by: Mike Christie <mchristi@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: target: iscsi: Fix np_ip_proto and np_sock_type in iscsit_setup_np

In the switch, np_ip_proto and np_sock_type set different values according
to np_network_transport, and then uniformly assign values, so the previous
values are overwritten.

Signed-off-by: tangwenji <tang.wenji@zte.com.cn>
Reviewed-by: Mike Christie <mchristi@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: target: fix unsigned comparision with less than zero

Currently an error return is being assigned to an unsigned size_t varianle
and then checked if the result is less than zero which will always be
false.  Fix this by making ret ssize_t rather than a size_t.

Fixes: 0322913cab79 ("scsi: target: Add device product id and revision configfs attributes")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Reviewed-by: Mike Christie <mchristi@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: ufs-mediatek: Avoid using ret uninitialized in ufs_mtk_setup_clocks

When building with -Wsometimes-uninitialized, Clang warns:

drivers/scsi/ufs/ufs-mediatek.c:112:7: warning: variable 'ret' is used
uninitialized whenever 'if' condition is false
[-Wsometimes-uninitialized]
                if (on)
                    ^~
drivers/scsi/ufs/ufs-mediatek.c:120:9: note: uninitialized use occurs
here
        return ret;
               ^~~
drivers/scsi/ufs/ufs-mediatek.c:112:3: note: remove the 'if' if its
condition is always true
                if (on)
                ^~~~~~~
drivers/scsi/ufs/ufs-mediatek.c:108:7: warning: variable 'ret' is used
uninitialized whenever 'if' condition is false
[-Wsometimes-uninitialized]
                if (!on)
                    ^~~
drivers/scsi/ufs/ufs-mediatek.c:120:9: note: uninitialized use occurs
here
        return ret;
               ^~~
drivers/scsi/ufs/ufs-mediatek.c:108:3: note: remove the 'if' if its
condition is always true
                if (!on)
                ^~~~~~~~
drivers/scsi/ufs/ufs-mediatek.c:96:9: note: initialize the variable
'ret' to silence this warning
        int ret;
               ^
                = 0
2 warnings generated.

Remove the default case and initialize ret to -EINVAL to properly fix
this warning.

Fixes: ddd90623ce26 ("scsi: ufs-mediatek: Add UFS support for Mediatek SoC chips")
Link: https://github.com/ClangBuiltLinux/linux/issues/426
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Reviewed-by: Stanley Chu <stanley.chu@mediatek.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: ufs-mediatek: Make some symbols static

Fix sparse warnings:

drivers/scsi/ufs/ufs-mediatek.c:19:6: warning: symbol 'ufs_mtk_cfg_unipro_cg' was not declared. Should it be static?
drivers/scsi/ufs/ufs-mediatek.c:55:5: warning: symbol 'ufs_mtk_bind_mphy' was not declared. Should it be static?
drivers/scsi/ufs/ufs-mediatek.c:342:27: warning: symbol 'ufs_mtk_of_match' was not declared. Should it be static?

Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Reviewed-by: Mukesh Ojha <mojha@codeaurora.org>
Reviewed-by: Stanley Chu <stanley.chu@mediatek.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: lpfc: Fixup eq_clr_intr references

Declaring interrupt clear routines as inline is bogus as they are used as
an indirect pointer.

Remove the inline references.

Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: lpfc: Fix build error

You can't declare a function inline in a header if it doesn't have a body
available to the compiler. So realistically you either don't declare it
inline or you make it a static inline in the header.  I think the latter
applies in this case, so this should be the fix

Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Acked-by: James Smart <james.smart@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: mvumi: Stop using plain integer as NULL pointer

Fix following sparse warning:

drivers/scsi/mvumi.c:1797:48: warning: Using plain integer as NULL pointer
drivers/scsi/mvumi.c:2143:50: warning: Using plain integer as NULL pointer
drivers/scsi/mvumi.c:755:58: warning: Using plain integer as NULL pointer

Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: qedi: Remove set but not used variable 'cls_sess'

Fixes gcc '-Wunused-but-set-variable' warning:

drivers/scsi/qedi/qedi_fw.c: In function 'qedi_tmf_resp_work':
drivers/scsi/qedi/qedi_fw.c:158:28: warning:
 variable 'cls_sess' set but not used [-Wunused-but-set-variable]

drivers/scsi/qedi/qedi_fw.c: In function 'qedi_tmf_work':
drivers/scsi/qedi/qedi_fw.c:1370:28: warning:
 variable 'cls_sess' set but not used [-Wunused-but-set-variable]

It's never used since introduction.

Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: be2iscsi: lpfc: fix typo

Fix spelling mistake: "lenght" -> "length"

Signed-off-by: Matteo Croce <mcroce@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: qla2xxx: Fix a small typo in qla_bsg.c

Fixed a typo for 'iiDMA' cmd in qla_bsg.c.

Signed-off-by: Milan P. Gandhi <mgandhi@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: qla2xxx: Fix comment alignment in qla_bsg.c

Fixed a minor formatting issue with comment section in qla_bsg.c

Signed-off-by: Milan P. Gandhi <mgandhi@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: mptfusion: remove set, but not used, variables

Fixes gcc '-Wunused-but-set-variable' warning:

drivers/message/fusion/mptspi.c: In function 'mptspi_writeIOCPage4':
drivers/message/fusion/mptspi.c:262:9: warning:
 variable 'frameOffset' set but not used [-Wunused-but-set-variable]

drivers/message/fusion/mptspi.c:261:9: warning:
 variable 'req_idx' set but not used [-Wunused-but-set-variable]

They're never used and can be removed.

Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: mptfusion: mark expected switch fall-through

In preparation to enabling -Wimplicit-fallthrough, mark switch cases where
we are expecting to fall through.

This patch fixes the following warning:

drivers/message/fusion/mptbase.c: In function  mptbase_reply :
drivers/message/fusion/mptbase.c:643:6: warning: this statement may fall through [-Wimplicit-fallthrough=]
   if (event != MPI_EVENT_EVENT_CHANGE)
      ^
drivers/message/fusion/mptbase.c:646:2: note: here
  case MPI_FUNCTION_CONFIG:
  ^~~~

Warning level 3 was used: -Wimplicit-fallthrough=3

Notice that, in this particular case, the code comment is modified in
accordance with what GCC is expecting to find.

This patch is part of the ongoing efforts to enable
-Wimplicit-fallthrough.

Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: mptfusion: fix indentation issues

There are several statements and code blocks there are incorrectly
indented. Fix these.

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: mvsas: clean up a few indentation issues

There are a few statements that are not indented correctly, so fix
these. Also add empty line between variable declaration and first
statements in functions. Also remove whitespace between * and mvi_dev to
clean up a cppcheck warning.

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: qlogicfas408: clean up a couple of indentation issues

An if statement is indented correctly and an outb statement has a redundant
empty comment and incorrect indentation. Fix these.

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: dpt_i2o: clean up indentation issues, remove spaces

There are several lines where the indentation has an extra space, fix this
by removing the spaces.

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>