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'exclude_id' is always SCSI_NO_TAG which will never be reached when
traversing the list of tags.
Link: https://lore.kernel.org/r/20210429122517.39659-2-hare@suse.de
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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Make sure that the cmd_per_lun value placed in the host template never
exceeds the can_queue value. If the max_queue driver parameter is not
specified then both cmd_per_lun and can_queue are set to CAN_QUEUE.
CAN_QUEUE is a compile time constant and is used to dimension an array to
hold queued requests. If the max_queue driver parameter is given it is must
be less than or equal to CAN_QUEUE and if so, the host template values are
adjusted.
Remove undocumented code that allowed queue_depth to exceed CAN_QUEUE and
cause stack full type errors. There is a documented way to do that with
every_nth and
echo 0x8000 > /sys/bus/pseudo/drivers/scsi_debug/opts
See: https://sg.danny.cz/sg/scsi_debug.html
Tweak some formatting, and add a suggestion to the "trim poll_queues"
warning.
Link: https://lore.kernel.org/r/20210415015031.607153-1-dgilbert@interlog.com
Reported-by: Kashyap Desai <kashyap.desai@broadcom.com>
Reviewed-by: John Garry <john.garry@hauwei.com>
Signed-off-by: Douglas Gilbert <dgilbert@interlog.com>
Signed-off-by: John Garry <john.garry@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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If spm_lvl is set to 0 or 1, when system suspend kicks start and HBA is
runtime active, system suspend may just bail without doing anything (the
fast path), leaving other contexts still running, e.g., clock gating and
clock scaling. When system resume kicks start, concurrency can happen
between ufshcd_resume() and these contexts, leading to various stability
issues.
Add a check against HBA's runtime state and allowing fast path only if HBA
is runtime suspended, otherwise let system suspend go ahead call
ufshcd_suspend(). This will guarantee that these contexts are stopped by
either runtime suspend or system suspend.
Link: https://lore.kernel.org/r/1619408921-30426-4-git-send-email-cang@codeaurora.org
Fixes: 0b257734344a ("scsi: ufs: optimize system suspend handling")
Reviewed-by: Daejun Park <daejun7.park@samsung.com>
Signed-off-by: Can Guo <cang@codeaurora.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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During ufs system suspend, leaving rpm_dev_flush_recheck_work running or
pending is risky because concurrency may happen between system
suspend/resume and runtime resume routine. Fix this by cancelling
rpm_dev_flush_recheck_work synchronously during system suspend.
Link: https://lore.kernel.org/r/1619408921-30426-3-git-send-email-cang@codeaurora.org
Fixes: 51dd905bd2f6 ("scsi: ufs: Fix WriteBooster flush during runtime suspend")
Reviewed-by: Daejun Park <daejun7.park@samsung.com>
Signed-off-by: Can Guo <cang@codeaurora.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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During resume, if link is broken due to AH8 failure, make sure
ufshcd_resume() does not put UFS power back into LPM.
Link: https://lore.kernel.org/r/1619408921-30426-2-git-send-email-cang@codeaurora.org
Fixes: 4db7a2360597 ("scsi: ufs: Fix concurrency of error handler and other error recovery paths")
Reviewed-by: Daejun Park <daejun7.park@samsung.com>
Signed-off-by: Can Guo <cang@codeaurora.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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In a case when the initiator in P2P mode by some circumstances does not
send PRLI, the target, in a case when the target port's WWPN is less than
initiator's, changes the discovery state in DSC_GNL. When gnl completes it
sends PRLI to the initiator.
Usually the initiator in P2P mode always sends PRLI. We caught this issue
on Linux stable v5.4.6 https://www.spinics.net/lists/stable/msg458515.html.
Fix this particular corner case in the behaviour of the P2P mod target
login state machine.
Link: https://lore.kernel.org/r/20210422153414.4022-1-a.kovaleva@yadro.com
Fixes: a9ed06d4e640 ("scsi: qla2xxx: Allow PLOGI in target mode")
Reviewed-by: Roman Bolshakov <r.bolshakov@yadro.com>
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: Anastasia Kovaleva <a.kovaleva@yadro.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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Add support for eh_should_retry_cmd callback in qla2xxx host template.
Link: https://lore.kernel.org/r/20210427050914.7270-1-njavali@marvell.com
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: Bikash Hazarika <bhazarika@marvell.com>
Signed-off-by: Nilesh Javali <njavali@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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If tcmu_handle_completions() finds an invalid cmd_id while looping over cmd
responses from userspace it sets TCMU_DEV_BIT_BROKEN and breaks the
loop. This means that it does further handling for the tcmu device.
Skip that handling by replacing 'break' with 'return'.
Additionally change tcmu_handle_completions() from unsigned int to bool,
since the value used in return already is bool.
Link: https://lore.kernel.org/r/20210423150123.24468-1-bostroesser@gmail.com
Signed-off-by: Bodo Stroesser <bostroesser@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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Fix the following typo:
ufschd_uic_link_state_to_string() -> ufshcd_uic_link_state_to_string()
ufschd_ufs_dev_pwr_mode_to_string() -> ufshcd_ufs_dev_pwr_mode_to_string()
Link: https://lore.kernel.org/r/1381713434.61619509208911.JavaMail.epsvc@epcpadp3
Signed-off-by: Keoseong Park <keosung.park@samsung.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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The dump command for reading a region passes a requested read length
specified in words (4-byte units). The response overwrites the same field
with the actual number of bytes read.
The mailbox handler for DUMP which reads VPD data (region 23) is treating
the response field as if it were still a word_cnt, thus multiplying it by 4
to set the read's "length". Given the read value was calculated based on
the size of the read buffer, the longer response length runs off the end of
the buffer.
Fix by reworking the code to use the response field as a byte count.
Link: https://lore.kernel.org/r/20210421234511.102206-1-jsmart2021@gmail.com
Co-developed-by: Justin Tee <justin.tee@broadcom.com>
Signed-off-by: Justin Tee <justin.tee@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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lpfc_bsg_ct_unsol_event() routine acts assigns a ct_request to the wrong
structure address, resulting in a bad address that results in bsg related
timeouts.
Correct the ct_request assignment to use the kernel virtual buffer address
(not the control structure address).
Link: https://lore.kernel.org/r/20210421234448.102132-1-jsmart2021@gmail.com
Co-developed-by: Justin Tee <justin.tee@broadcom.com>
Signed-off-by: Justin Tee <justin.tee@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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In devloss timer handler and in backend calls to terminate remote port I/O,
there is logic to walk through all active IOCBs and validate them to
potentially trigger an abort request. This logic is causing illegal memory
accesses which leads to a crash. Abort IOCBs, which may be on the list, do
not have an associated lpfc_io_buf struct. The driver is trying to map an
lpfc_io_buf struct on the IOCB and which results in a bogus address thus
the issue.
Fix by skipping over ABORT IOCBs (CLOSE IOCBs are ABORTS that don't send
ABTS) in the IOCB scan logic.
Link: https://lore.kernel.org/r/20210421234433.102079-1-jsmart2021@gmail.com
Co-developed-by: Justin Tee <justin.tee@broadcom.com>
Signed-off-by: Justin Tee <justin.tee@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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Fixes the following warning when running 'make htmldocs':
include/linux/blk-mq.h:395: warning: Function parameter or member
'set_rq_budget_token' not described in 'blk_mq_ops'
include/linux/blk-mq.h:395: warning: Function parameter or member
'get_rq_budget_token' not described in 'blk_mq_ops'
[mkp: added warning messages]
Link: https://lore.kernel.org/r/20210421154526.1954174-1-ming.lei@redhat.com
Fixes: d022d18c045f ("scsi: blk-mq: Add callbacks for storing & retrieving budget token")
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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Fix the function name in the kernel-doc header above ft_prli().
Link: https://lore.kernel.org/r/20210415220826.29438-21-bvanassche@acm.org
Cc: Hannes Reinecke <hare@suse.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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Do not print tg_pt_gp->tg_pt_gp_valid_id if we already know that it is zero.
Link: https://lore.kernel.org/r/20210415220826.29438-20-bvanassche@acm.org
Cc: Mike Christie <michael.christie@oracle.com>
Reviewed-by: Mike Christie <michael.christie@oracle.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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Use format specifier '%u' to format the u32 data type instead of '%hu'.
Link: https://lore.kernel.org/r/20210415220826.29438-19-bvanassche@acm.org
Cc: Mike Christie <michael.christie@oracle.com>
Reviewed-by: Mike Christie <michael.christie@oracle.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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Instead of leaving it implicit that SAM_STAT_GOOD == 0, compare explicitly
with SAM_STAT_GOOD.
Link: https://lore.kernel.org/r/20210415220826.29438-18-bvanassche@acm.org
Reviewed-by: Mike Christie <michael.christie@oracle.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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Instead of using 'retval' to represent first a SCSI status and later
whether or not a disk change event occurred, introduce a new variable for
the latter purpose.
Link: https://lore.kernel.org/r/20210415220826.29438-17-bvanassche@acm.org
Cc: Christoph Hellwig <hch@lst.de>
Cc: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Cc: Hannes Reinecke <hare@suse.de>
Cc: Daniel Wagner <dwagner@suse.de>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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The dc395x driver is one of the two drivers that passes an u8 argument to
status_byte() instead of an s32 argument. Open-code status_byte() in
preparation of changing SCSI status values into a structure.
Link: https://lore.kernel.org/r/20210415220826.29438-16-bvanassche@acm.org
Cc: Hannes Reinecke <hare@suse.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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The 53c700 driver is one of the two drivers that passes an u8 argument to
status_byte() instead of an s32 argument. Open-code status_byte in
preparation of changing SCSI status values into a structure.
Link: https://lore.kernel.org/r/20210415220826.29438-15-bvanassche@acm.org
Cc: "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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This was detected by building the kernel with clang and W=1.
Link: https://lore.kernel.org/r/20210415220826.29438-14-bvanassche@acm.org
Cc: Don Brace <don.brace@microchip.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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This was detected by building the kernel with clang and W=1.
Link: https://lore.kernel.org/r/20210415220826.29438-13-bvanassche@acm.org
Cc: Nilesh Javali <njavali@marvell.com>
Acked-by: Manish Rangankar <mrangankar@marvell.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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This was detected by building the kernel with clang and W=1.
Link: https://lore.kernel.org/r/20210415220826.29438-12-bvanassche@acm.org
Cc: Hannes Reinecke <hare@kernel.org>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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This was detected by building the kernel with clang and W=1.
Link: https://lore.kernel.org/r/20210415220826.29438-11-bvanassche@acm.org
Cc: Hannes Reinecke <hare@kernel.org>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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Fix the following warnings:
drivers/scsi/mpt3sas/mpt3sas_base.c:5430: warning: Excess function parameter 'ct' description in '_base_allocate_pcie_sgl_pool'
drivers/scsi/mpt3sas/mpt3sas_base.c:5493: warning: Excess function parameter 'ctr' description in '_base_allocate_chain_dma_pool'
Link: https://lore.kernel.org/r/20210415220826.29438-10-bvanassche@acm.org
Fixes: d6adc251dd2f ("scsi: mpt3sas: Force PCIe scatterlist allocations to be within same 4 GB region")
Fixes: 7dd847dae1c4 ("scsi: mpt3sas: Force chain buffer allocations to be within same 4 GB region")
Cc: Sathya Prakash <sathya.prakash@broadcom.com>
Cc: Sreekanth Reddy <sreekanth.reddy@broadcom.com>
Cc: Suganath Prabu Subramani <suganath-prabu.subramani@broadcom.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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Suppress the following compiler warning:
warning: cast to smaller integer type
'enum fip_mode' from 'void *' [-Wvoid-pointer-to-enum-cast]
enum fip_mode fip_mode = (enum fip_mode)kp->arg;
^~~~~~~~~~~~~~~~~~~~~~
Link: https://lore.kernel.org/r/20210415220826.29438-9-bvanassche@acm.org
Cc: Hannes Reinecke <hare@suse.de>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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Since the 'mfs' member has been declared as 'u32' in include/scsi/libfc.h,
use the %u format specifier instead of %hu. This patch fixes the following
clang compiler warning:
warning: format specifies type
'unsigned short' but the argument has type 'u32' (aka 'unsigned int')
[-Wformat]
"lport->mfs:%hu\n", mfs, lport->mfs);
~~~ ^~~~~~~~~~
%u
Link: https://lore.kernel.org/r/20210415220826.29438-8-bvanassche@acm.org
Cc: Hannes Reinecke <hare@suse.de>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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This was detected by building the kernel with clang and W=1.
Link: https://lore.kernel.org/r/20210415220826.29438-7-bvanassche@acm.org
Cc: aacraid@microsemi.com
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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Improve readability of the code in the SCSI core by introducing an
enumeration type for the values used internally that decide how to continue
processing a SCSI command. The eh_*_handler return values have not been
changed because that would involve modifying all SCSI drivers.
The output of the following command has been inspected to verify that no
out-of-range values are assigned to a variable of type enum
scsi_disposition:
KCFLAGS=-Wassign-enum make CC=clang W=1 drivers/scsi/
Link: https://lore.kernel.org/r/20210415220826.29438-6-bvanassche@acm.org
Cc: Christoph Hellwig <hch@lst.de>
Cc: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Cc: Hannes Reinecke <hare@suse.de>
Cc: Daniel Wagner <dwagner@suse.de>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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The comment above scsi_send_eh_cmnd() says: "Returns SUCCESS or FAILED or
NEEDS_RETRY". This patch makes all values returned by scsi_send_eh_cmnd()
match the documentation of this function. This change does not affect the
behavior of scsi_eh_tur() nor of scsi_eh_try_stu() nor of the
scsi_request_sense() callers.
See also commit bbe9fb0d04b9 ("scsi: Avoid that .queuecommand() gets called
for a blocked SCSI device"; v5.3).
Link: https://lore.kernel.org/r/20210415220826.29438-5-bvanassche@acm.org
Cc: Christoph Hellwig <hch@lst.de>
Cc: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Cc: Hannes Reinecke <hare@suse.de>
Cc: Daniel Wagner <dwagner@suse.de>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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Commit 320ae51feed5 ("blk-mq: new multi-queue block IO queueing mechanism";
v3.13) introduced a code path that calls the blk-mq completion function
from interrupt context. scsi-mq was introduced by commit d285203cf647
("scsi: add support for a blk-mq based I/O path."; v3.17).
Since the introduction of scsi-mq, scsi_softirq_done() can be called from
interrupt context. That made the name of the function misleading, rename it
to scsi_complete().
Link: https://lore.kernel.org/r/20210415220826.29438-4-bvanassche@acm.org
Cc: Christoph Hellwig <hch@lst.de>
Cc: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Cc: Hannes Reinecke <hare@suse.de>
Cc: Daniel Wagner <dwagner@suse.de>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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scsi_device.sdev_target is used in more code than the single_lun code,
hence remove the comment next to the definition of the sdev_target member.
Link: https://lore.kernel.org/r/20210415220826.29438-3-bvanassche@acm.org
Cc: Christoph Hellwig <hch@lst.de>
Cc: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Cc: Hannes Reinecke <hare@suse.de>
Cc: Daniel Wagner <dwagner@suse.de>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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The current scsi_alloc_sgtables() documentation does not accurately explain
what this function does. Hence improve the documentation of this function.
Link: https://lore.kernel.org/r/20210415220826.29438-2-bvanassche@acm.org
Cc: Christoph Hellwig <hch@lst.de>
Cc: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Cc: Hannes Reinecke <hare@suse.de>
Cc: Daniel Wagner <dwagner@suse.de>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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Introduce spin lock for outbound queue. With this, driver need not acquire
HBA global lock for outbound queue processing.
Link: https://lore.kernel.org/r/20210415103352.3580-9-Viswas.G@microchip.com
Acked-by: Jack Wang <jinpu.wang@cloud.ionos.com>
Signed-off-by: Viswas G <Viswas.G@microchip.com>
Signed-off-by: Ruksar Devadi <Ruksar.devadi@microchip.com>
Signed-off-by: Ashokkumar N <Ashokkumar.N@microchip.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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Producer index(PI) outbound queue and consumer index(CI) for Outbound queue
are in DMA memory. During resume(), the stale PI and CI Values will lead to
unexpected behavior. These values should be reset to 0 during driver
reinitialization.
Link: https://lore.kernel.org/r/20210415103352.3580-8-Viswas.G@microchip.com
Acked-by: Jack Wang <jinpu.wang@cloud.ionos.com>
Signed-off-by: Viswas G <Viswas.G@microchip.com>
Signed-off-by: Ruksar Devadi <Ruksar.devadi@microchip.com>
Signed-off-by: Ashokkumar N <Ashokkumar.N@microchip.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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When controller runs into fatal error, I/Os get stuck with no response,
handler event is defined to complete the pending I/Os (SAS task and
internal task) and also perform the cleanup for the drives.
Link: https://lore.kernel.org/r/20210415103352.3580-7-Viswas.G@microchip.com
Acked-by: Jack Wang <jinpu.wang@cloud.ionos.com>
Signed-off-by: Ruksar Devadi <Ruksar.devadi@microchip.com>
Signed-off-by: Viswas G <Viswas.G@microchip.com>
Signed-off-by: Ashokkumar N <Ashokkumar.N@microchip.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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A new sysfs variable 'ctl_iop1_count' is being introduced that tells if
the controller is alive by indicating controller ticks. If on subsequent
run we see the ticks changing that indicates that controller is not
dead.
Using the 'ctl_iop1_count' sysfs variable we can see ticks incrementing:
linux-9saw:~# cat /sys/class/scsi_host/host*/ctl_iop1_count
0x00000069
0x0000006b
0x0000006d
0x00000072
Link: https://lore.kernel.org/r/20210415103352.3580-6-Viswas.G@microchip.com
Acked-by: Jack Wang <jinpu.wang@ionos.com>
Signed-off-by: Vishakha Channapattan <vishakhavc@google.com>
Signed-off-by: Viswas G <Viswas.G@microchip.com>
Signed-off-by: Ruksar Devadi <Ruksar.devadi@microchip.com>
Signed-off-by: Ashokkumar N <Ashokkumar.N@microchip.com>
Signed-off-by: Radha Ramachandran <radha@google.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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A new sysfs variable 'ctl_iop0_count' is being introduced that tells if
the controller is alive by indicating controller ticks. If on subsequent
run we see the ticks changing that indicates that controller is not
dead.
Using the 'ctl_iop0_count' sysfs variable we can see ticks incrementing:
linux-9saw:~# cat /sys/class/scsi_host/host*/ctl_iop0_count
0x000000a3
0x000001db
0x000001e4
0x000001e7
Link: https://lore.kernel.org/r/20210415103352.3580-5-Viswas.G@microchip.com
Acked-by: Jack Wang <jinpu.wang@ionos.com>
Signed-off-by: Vishakha Channapattan <vishakhavc@google.com>
Signed-off-by: Viswas G <Viswas.G@microchip.com>
Signed-off-by: Ruksar Devadi <Ruksar.devadi@microchip.com>
Signed-off-by: Ashokkumar N <Ashokkumar.N@microchip.com>
Signed-off-by: Radha Ramachandran <radha@google.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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A new sysfs variable 'ctl_raae_count' is being introduced that tells if the
controller is alive by indicating controller ticks. If on subsequent run we
see the ticks changing in RAAE count that indicates that controller is not
dead.
Using the 'ctl_raae_count' sysfs variable we can see ticks incrementing:
linux-9saw:~# cat /sys/class/scsi_host/host*/ctl_raae_count
0x00002245
0x00002253
0x0000225e
Link: https://lore.kernel.org/r/20210415103352.3580-4-Viswas.G@microchip.com
Acked-by: Jack Wang <jinpu.wang@ionos.com>
Signed-off-by: Vishakha Channapattan <vishakhavc@google.com>
Signed-off-by: Viswas G <Viswas.G@microchip.com>
Signed-off-by: Ruksar Devadi <Ruksar.devadi@microchip.com>
Signed-off-by: Ashokkumar N <Ashokkumar.N@microchip.com>
Signed-off-by: Radha Ramachandran <radha@google.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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A new sysfs variable 'ctl_hmi_error' is being introduced to give the error
details if the MPI initialization fails
Using the 'ctl_hmi_error' sysfs variable we can check the error details:
linux-2dq0:~# cat /sys/class/scsi_host/host*/ctl_hmi_error
0x00000000
0x00000000
0x00000000
Link: https://lore.kernel.org/r/20210415103352.3580-3-Viswas.G@microchip.com
Signed-off-by: Vishakha Channapattan <vishakhavc@google.com>
Signed-off-by: Viswas G <Viswas.G@microchip.com>
Signed-off-by: Ruksar Devadi <Ruksar.devadi@microchip.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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A new sysfs variable 'ctl_mpi_state' is being introduced to check the state
of MPI.
Using the 'ctl_mpi_state' sysfs variable we can check the MPI state:
linux-2dq0:~# cat /sys/class/scsi_host/host*/ctl_mpi_state
MPI is successfully initialized
Link: https://lore.kernel.org/r/20210415103352.3580-2-Viswas.G@microchip.com
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Vishakha Channapattan <vishakhavc@google.com>
Signed-off-by: Viswas G <Viswas.G@microchip.com>
Signed-off-by: Ruksar Devadi <Ruksar.devadi@microchip.com>
Signed-off-by: Ashokkumar N <Ashokkumar.N@microchip.com>
Signed-off-by: Radha Ramachandran <radha@google.com>
Signed-off-by: kernel test robot <lkp@intel.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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The qdio layer currently provides its own infrastructure to scan for
Request Queue completions & to report them to the device driver. This
comes with several drawbacks - having an async tasklet & timer construct in
qdio introduces additional lifetime complexity, and makes it harder to
integrate them with the rest of the device driver. The timeouts are also
currently hard-coded, and can't be tweaked without affecting other qdio
drivers (ie. qeth).
But due to recent enhancements to the qdio layer, zfcp can actually take
full control of the Request Queue completion processing. It merely needs to
opt-out from the qdio layer mechanisms by setting the scan_threshold to 0,
and then use qdio_inspect_queue() to scan for completions.
So re-implement the tasklet & timer mechanism in zfcp, while initially
copying the scan conditions from qdio's handle_outbound() and
qdio_outbound_tasklet(). One minor behavioural change is that
zfcp_qdio_send() will unconditionally reduce the timeout to 1 HZ, rather
than leaving it at 10 Hz if it was last armed by the tasklet. This just
makes things more consistent. Also note that we can drop a lot of the
accumulated cruft in qdio_outbound_tasklet(), as zfcp doesn't even use PCI
interrupt requests any longer.
This also slightly touches the Response Queue processing, as
qdio_get_next_buffers() will no longer implicitly scan for Request Queue
completions. So complete the migration to qdio_inspect_queue() here as well
and make the tasklet_schedule() visible.
Link: https://lore.kernel.org/r/018d3ddd029f8d6ac00cf4184880288c637c4fd1.1618417667.git.bblock@linux.ibm.com
Reviewed-by: Benjamin Block <bblock@linux.ibm.com>
Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: Benjamin Block <bblock@linux.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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Place the put_device() call after device_unregister() in both
zfcp_unit_remove() and zfcp_sysfs_port_remove_store() to make it more
natural. put_device() ought to be the last time we touch the object in both
functions.
Add comments after put_device() to make code clearer.
Link: https://lore.kernel.org/r/0a568c7733ba0f1dde28b0c663b90270d44dd540.1618417667.git.bblock@linux.ibm.com
Suggested-by: Steffen Maier <maier@linux.ibm.com>
Suggested-by: Benjamin Block <bblock@linux.ibm.com>
Signed-off-by: Qinglang Miao <miaoqinglang@huawei.com>
Signed-off-by: Benjamin Block <bblock@linux.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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The error path from zfcp_adapter_enqueue() no longer attempts to remove the
diagnostics attributes if they haven't been created yet.
So remove the manual 'sysfs_established' guard for this case, and use
device_add_groups() to add all adapter-related sysfs attributes in one go.
Link: https://lore.kernel.org/r/37a97537f675d643006271f37723c346189b6eec.1618417667.git.bblock@linux.ibm.com
Reviewed-by: Benjamin Block <bblock@linux.ibm.com>
Reviewed-by: Steffen Maier <maier@linux.ibm.com>
Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: Benjamin Block <bblock@linux.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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When zfcp_adapter_enqueue() fails to create the zfcp_sysfs_adapter_attrs
group, it calls zfcp_adapter_unregister() to tear down the adapter state
again. This then unconditionally attempts to remove the
zfcp_sysfs_adapter_attrs group, resulting in a "group not found" WARN from
sysfs code.
Avoid this by copying most of zfcp_adapter_unregister() into the error
path, allowing for more fine-granular roll-back. Then skip the sysfs
tear-down steps if we haven't progressed this far in the initialization.
Link: https://lore.kernel.org/r/790922cc3af075795fff9a4b787e6bda19bdb3be.1618417667.git.bblock@linux.ibm.com
Reviewed-by: Benjamin Block <bblock@linux.ibm.com>
Reviewed-by: Steffen Maier <maier@linux.ibm.com>
Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: Benjamin Block <bblock@linux.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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Code indentation should use tabs where possible.
Link: https://lore.kernel.org/r/e8a15a2f3d64e2e76a214647cfd4fe23d370b165.1618417667.git.bblock@linux.ibm.com
Signed-off-by: Yevhen Viktorov <yevhen.viktorov@virginmedia.com>
Signed-off-by: Steffen Maier <maier@linux.ibm.com>
Signed-off-by: Benjamin Block <bblock@linux.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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INIT_LIST_HEAD() is only needed for actual list heads, while req->list is
used as a list entry.
Note that when the error path in zfcp_fsf_req_send() removes the request
from the adapter's list of pending requests, it actually looks up the
request from the zfcp_reqlist - rather than just calling list_del(). So
there's no risk of us calling list_del() on a request that hasn't been
added to any list yet.
Link: https://lore.kernel.org/r/254dc0ae28dccc43ab0b1079ef2c8dcb5fe1d2e4.1618417667.git.bblock@linux.ibm.com
Reviewed-by: Benjamin Block <bblock@linux.ibm.com>
Reviewed-by: Steffen Maier <maier@linux.ibm.com>
Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: Benjamin Block <bblock@linux.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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Commit a6dcfe08487e ("scsi: qla2xxx: Limit interrupt vectors to number of
CPUs") lowers the number of allocated MSI-X vectors to the number of CPUs.
That breaks vector allocation assumptions in qla83xx_iospace_config(),
qla24xx_enable_msix() and qla2x00_iospace_config(). Either of the functions
computes maximum number of qpairs as:
ha->max_qpairs = ha->msix_count - 1 (MB interrupt) - 1 (default
response queue) - 1 (ATIO, in dual or pure target mode)
max_qpairs is set to zero in case of two CPUs and initiator mode. The
number is then used to allocate ha->queue_pair_map inside
qla2x00_alloc_queues(). No allocation happens and ha->queue_pair_map is
left NULL but the driver thinks there are queue pairs available.
qla2xxx_queuecommand() tries to find a qpair in the map and crashes:
if (ha->mqenable) {
uint32_t tag;
uint16_t hwq;
struct qla_qpair *qpair = NULL;
tag = blk_mq_unique_tag(cmd->request);
hwq = blk_mq_unique_tag_to_hwq(tag);
qpair = ha->queue_pair_map[hwq]; # <- HERE
if (qpair)
return qla2xxx_mqueuecommand(host, cmd, qpair);
}
BUG: kernel NULL pointer dereference, address: 0000000000000000
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 0 P4D 0
Oops: 0000 [#1] SMP PTI
CPU: 0 PID: 72 Comm: kworker/u4:3 Tainted: G W 5.10.0-rc1+ #25
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.0.0-prebuilt.qemu-project.org 04/01/2014
Workqueue: scsi_wq_7 fc_scsi_scan_rport [scsi_transport_fc]
RIP: 0010:qla2xxx_queuecommand+0x16b/0x3f0 [qla2xxx]
Call Trace:
scsi_queue_rq+0x58c/0xa60
blk_mq_dispatch_rq_list+0x2b7/0x6f0
? __sbitmap_get_word+0x2a/0x80
__blk_mq_sched_dispatch_requests+0xb8/0x170
blk_mq_sched_dispatch_requests+0x2b/0x50
__blk_mq_run_hw_queue+0x49/0xb0
__blk_mq_delay_run_hw_queue+0xfb/0x150
blk_mq_sched_insert_request+0xbe/0x110
blk_execute_rq+0x45/0x70
__scsi_execute+0x10e/0x250
scsi_probe_and_add_lun+0x228/0xda0
__scsi_scan_target+0xf4/0x620
? __pm_runtime_resume+0x4f/0x70
scsi_scan_target+0x100/0x110
fc_scsi_scan_rport+0xa1/0xb0 [scsi_transport_fc]
process_one_work+0x1ea/0x3b0
worker_thread+0x28/0x3b0
? process_one_work+0x3b0/0x3b0
kthread+0x112/0x130
? kthread_park+0x80/0x80
ret_from_fork+0x22/0x30
The driver should allocate enough vectors to provide every CPU it's own HW
queue and still handle reserved (MB, RSP, ATIO) interrupts.
The change fixes the crash on dual core VM and prevents unbalanced QP
allocation where nr_hw_queues is two less than the number of CPUs.
Link: https://lore.kernel.org/r/20210412165740.39318-1-r.bolshakov@yadro.com
Fixes: a6dcfe08487e ("scsi: qla2xxx: Limit interrupt vectors to number of CPUs")
Cc: Daniel Wagner <daniel.wagner@suse.com>
Cc: Himanshu Madhani <himanshu.madhani@oracle.com>
Cc: Quinn Tran <qutran@marvell.com>
Cc: Nilesh Javali <njavali@marvell.com>
Cc: Martin K. Petersen <martin.petersen@oracle.com>
Cc: stable@vger.kernel.org # 5.11+
Reported-by: Aleksandr Volkov <a.y.volkov@yadro.com>
Reported-by: Aleksandr Miloserdov <a.miloserdov@yadro.com>
Reviewed-by: Daniel Wagner <dwagner@suse.de>
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: Roman Bolshakov <r.bolshakov@yadro.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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Dan Carpenter found a possible NULL pointer dereference issue in function
pqi_sas_port_add_rphy():
drivers/scsi/smartpqi/smartpqi_sas_transport.c:97
pqi_sas_port_add_rphy() warn: variable dereferenced before
check 'pqi_sas_port->device' (see line 95)
Correct issue by moving reference of pqi_sas_port->device after the check
for the device pointer being non-NULL.
Link: https://www.mail-archive.com/kbuild@lists.01.org/msg06329.html
Link: https://lore.kernel.org/r/161850493026.7302.10032784239320437353.stgit@brunhilda
Fixes: ec504b23df9d ("scsi: smartpqi: Add phy ID support for the physical drives")
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Reported-by: kernel test robot <lkp@intel.com>
Reviewed-by: Scott Benesh <scott.benesh@microchip.com>
Reviewed-by: Scott Teel <scott.teel@microchip.com>
Reviewed-by: Mike McGowen <mike.mcgowen@microchip.com>
Reviewed-by: Kevin Barnett <kevin.barnett@microchip.com>
Signed-off-by: Don Brace <don.brace@microchip.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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Dan Carpenter found a possible divide by 0 issue in the smartpqi driver in
functions pci_get_aio_common_raid_map_values() and pqi_calc_aio_r5_or_r6().
The variable rmd->blocks_per_row is used as a divisor and could be 0.
Using rmd->blocks_per_row as a divisor without checking
it for 0 first.
Correct these possible divide by 0 conditions by insuring that
rmd->blocks_per_row is not zero before usage. The check for non-0 was too
late to prevent a divide by 0 condition. Add in a comment to explain why
the check for non-zero is necessary. If the member is 0, return
PQI_RAID_BYPASS_INELIGIBLE before any division is performed.
Link: https://lore.kernel.org/linux-scsi/YG%2F5kWHHAr7w5dU5@mwanda/
Link: https://lore.kernel.org/r/161850492435.7302.392780350442938047.stgit@brunhilda
Fixes: 6702d2c40f31 ("scsi: smartpqi: Add support for RAID5 and RAID6 writes")
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Reported-by: kernel test robot <lkp@intel.com>
Reviewed-by: Scott Benesh <scott.benesh@microchip.com>
Reviewed-by: Scott Teel <scott.teel@microchip.com>
Reviewed-by: Mike McGowen <mike.mcgowen@microchip.com>
Reviewed-by: Kevin Barnett <kevin.barnett@microchip.com>
Signed-off-by: Don Brace <don.brace@microchip.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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Hannes Reinecke
Douglas Gilbert
Can Guo
Anastasia Kovaleva
Bikash Hazarika
Bodo Stroesser
Keoseong Park
James Smart
Ming Lei
Bart Van Assche
Viswas G
Ruksar Devadi
Vishakha Channapattan
Julian Wiedmann
Qinglang Miao
Yevhen Viktorov
Roman Bolshakov
Don Brace