[ Upstream commit 764907293edc1af7ac857389af9dc858944f53dc ]
While testing live partition mobility, we have observed occasional crashes
of the Linux partition. What we've seen is that during the live migration,
for specific configurations with large amounts of memory, slow network
links, and workloads that are changing memory a lot, the partition can end
up being suspended for 30 seconds or longer. This resulted in the following
scenario:
CPU 0 CPU 1
------------------------------- ----------------------------------
scsi_queue_rq migration_store
-> blk_mq_start_request -> rtas_ibm_suspend_me
-> blk_add_timer -> on_each_cpu(rtas_percpu_suspend_me
_______________________________________V
|
V
-> IPI from CPU 1
-> rtas_percpu_suspend_me
-> __rtas_suspend_last_cpu
-- Linux partition suspended for > 30 seconds --
-> for_each_online_cpu(cpu)
plpar_hcall_norets(H_PROD
-> scsi_dispatch_cmd
-> scsi_times_out
-> scsi_abort_command
-> queue_delayed_work
-> ibmvfc_queuecommand_lck
-> ibmvfc_send_event
-> ibmvfc_send_crq
- returns H_CLOSED
<- returns SCSI_MLQUEUE_HOST_BUSY
-> __blk_mq_requeue_request
-> scmd_eh_abort_handler
-> scsi_try_to_abort_cmd
- returns SUCCESS
-> scsi_queue_insert
Normally, the SCMD_STATE_COMPLETE bit would protect against the command
completion and the timeout, but that doesn't work here, since we don't
check that at all in the SCSI_MLQUEUE_HOST_BUSY path.
In this case we end up calling scsi_queue_insert on a request that has
already been queued, or possibly even freed, and we crash.
The patch below simply increases the default I/O timeout to avoid this race
condition. This is also the timeout value that nearly all IBM SAN storage
recommends setting as the default value.
Link: https://lore.kernel.org/r/1610463998-19791-1-git-send-email-brking@linux.vnet.ibm.com
Signed-off-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
[ Upstream commit d6e3ae76728ccde49271d9f5acfebbea0c5625a3 ]
When ioread32() returns 0xFFFFFFFF, we should execute cleanup functions
like other error handling paths before returning.
Link: https://lore.kernel.org/r/20201225083520.22015-1-dinghao.liu@zju.edu.cn
Acked-by: Karan Tilak Kumar <kartilak@cisco.com>
Signed-off-by: Dinghao Liu <dinghao.liu@zju.edu.cn>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
[ Upstream commit b2b0f16fa65e910a3ec8771206bb49ee87a54ac5 ]
A race condition exists between the response handler getting called because
of exchange_mgr_reset() (which clears out all the active XIDs) and the
response we get via an interrupt.
Sequence of events:
rport ba0200: Port timeout, state PLOGI
rport ba0200: Port entered PLOGI state from PLOGI state
xid 1052: Exchange timer armed : 20000 msecs xid timer armed here
rport ba0200: Received LOGO request while in state PLOGI
rport ba0200: Delete port
rport ba0200: work event 3
rport ba0200: lld callback ev 3
bnx2fc: rport_event_hdlr: event = 3, port_id = 0xba0200
bnx2fc: ba0200 - rport not created Yet!!
/* Here we reset any outstanding exchanges before
freeing rport using the exch_mgr_reset() */
xid 1052: Exchange timer canceled
/* Here we got two responses for one xid */
xid 1052: invoking resp(), esb 20000000 state 3
xid 1052: invoking resp(), esb 20000000 state 3
xid 1052: fc_rport_plogi_resp() : ep->resp_active 2
xid 1052: fc_rport_plogi_resp() : ep->resp_active 2
Skip the response if the exchange is already completed.
Link: https://lore.kernel.org/r/20201215194731.2326-1-jhasan@marvell.com
Signed-off-by: Javed Hasan <jhasan@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
[ Upstream commit 72eeb7c7151302ef007f1acd018cbf6f30e50321 ]
If the port is in SRP_RPORT_FAIL_FAST state when srp_reconnect_rport() is
entered, a transition to SDEV_BLOCK would be illegal, and a kernel WARNING
would be triggered. Skip scsi_target_block() in this case.
Link: https://lore.kernel.org/r/20210111142541.21534-1-mwilck@suse.com
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin Wilck <mwilck@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
[ Upstream commit b112036535eda34460677ea883eaecc3a45a435d ]
Phil Oester reported that a fix for a possible buffer overrun that I sent
caused a regression that manifests in this output:
Event Message: A PCI parity error was detected on a component at bus 0 device 5 function 0.
Severity: Critical
Message ID: PCI1308
The original code tried to handle the sense data pointer differently when
using 32-bit 64-bit DMA addressing, which would lead to a 32-bit dma_addr_t
value of 0x11223344 to get stored
32-bit kernel: 44 33 22 11 ?? ?? ?? ??
64-bit LE kernel: 44 33 22 11 00 00 00 00
64-bit BE kernel: 00 00 00 00 44 33 22 11
or a 64-bit dma_addr_t value of 0x1122334455667788 to get stored as
32-bit kernel: 88 77 66 55 ?? ?? ?? ??
64-bit kernel: 88 77 66 55 44 33 22 11
In my patch, I tried to ensure that the same value is used on both 32-bit
and 64-bit kernels, and picked what seemed to be the most sensible
combination, storing 32-bit addresses in the first four bytes (as 32-bit
kernels already did), and 64-bit addresses in eight consecutive bytes (as
64-bit kernels already did), but evidently this was incorrect.
Always storing the dma_addr_t pointer as 64-bit little-endian,
i.e. initializing the second four bytes to zero in case of 32-bit
addressing, apparently solved the problem for Phil, and is consistent with
what all 64-bit little-endian machines did before.
I also checked in the history that in previous versions of the code, the
pointer was always in the first four bytes without padding, and that
previous attempts to fix 64-bit user space, big-endian architectures and
64-bit DMA were clearly flawed and seem to have introduced made this worse.
Link: https://lore.kernel.org/r/20210104234137.438275-1-arnd@kernel.org
Fixes: 381d34e376e3 ("scsi: megaraid_sas: Check user-provided offsets")
Fixes: 107a60dd71 ("scsi: megaraid_sas: Add support for 64bit consistent DMA")
Fixes: 94cd65ddf4 ("[SCSI] megaraid_sas: addded support for big endian architecture")
Fixes: 7b2519afa1 ("[SCSI] megaraid_sas: fix 64 bit sense pointer truncation")
Reported-by: Phil Oester <kernel@linuxace.com>
Tested-by: Phil Oester <kernel@linuxace.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
[ Upstream commit e5cc9002caafacbaa8dab878d17a313192c3b03b ]
The block layer code will split a large zeroout request into multiple bios
and if WRITE SAME is disabled because the storage device reports that it
does not support it (or support the length used), we can get an error
message from the block layer despite the setting of RQF_QUIET on the first
request. This is because more than one request may have already been
submitted.
Fix this by setting RQF_QUIET when BLK_STS_TARGET is returned to fail the
request early, we don't need to log a message because we did not actually
submit the command to the device, and the block layer code will handle the
error by submitting individual write bios.
Link: https://lore.kernel.org/r/20201207221021.28243-1-emilne@redhat.com
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Ewan D. Milne <emilne@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
[ Upstream commit 35fc4cd34426c242ab015ef280853b7bff101f48 ]
Users can initiate resets to specific SCSI device/target/host through
IOCTL. When this happens, the SCSI cmd passed to eh_device/target/host
_reset_handler() callbacks is initialized with a request whose tag is -1.
In this case it is not right for eh_device_reset_handler() callback to
count on the LUN get from hba->lrb[-1]. Fix it by getting LUN from the SCSI
device associated with the SCSI cmd.
Link: https://lore.kernel.org/r/1609157080-26283-1-git-send-email-cang@codeaurora.org
Reviewed-by: Avri Altman <avri.altman@wdc.com>
Reviewed-by: Stanley Chu <stanley.chu@mediatek.com>
Signed-off-by: Can Guo <cang@codeaurora.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
commit fdb827e4a3 upstream.
Fix sparse warning:
drivers/scsi/lpfc/lpfc_nportdisc.c:344:1: warning:
symbol 'lpfc_defer_acc_rsp' was not declared. Should it be static?
Link: https://lore.kernel.org/r/20200107014956.41748-1-yuehaibing@huawei.com
Reported-by: Hulk Robot <hulkci@huawei.com>
Reviewed-by: James Smart <james.smart@broadcom.com>
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit f7cb0d0945 upstream.
Fix sparse warnings:
drivers/scsi/lpfc/lpfc_nportdisc.c:290:1: warning: symbol 'lpfc_defer_pt2pt_acc' was not declared. Should it be static?
Link: https://lore.kernel.org/r/1570183477-137273-1-git-send-email-zhengbin13@huawei.com
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: zhengbin <zhengbin13@huawei.com>
Reviewed-by: Dick Kennedy <dick.kennedy@broadcom.com>
Reviewed-by: James Smart <james.smart@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
[ Upstream commit cfefd9f8240a7b9fdd96fcd54cb029870b6d8d88 ]
Disable runtime power management during domain validation. Since a later
patch removes RQF_PREEMPT, set RQF_PM for domain validation commands such
that these are executed in the quiesced SCSI device state.
Link: https://lore.kernel.org/r/20201209052951.16136-6-bvanassche@acm.org
Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: James Bottomley <James.Bottomley@HansenPartnership.com>
Cc: Woody Suwalski <terraluna977@gmail.com>
Cc: Can Guo <cang@codeaurora.org>
Cc: Stanley Chu <stanley.chu@mediatek.com>
Cc: Ming Lei <ming.lei@redhat.com>
Cc: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Cc: Stan Johnson <userm57@yahoo.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jens Axboe <axboe@kernel.dk>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
[ Upstream commit af423534d2de86cd0db729a5ac41f056ca8717de ]
The expectation for suspend-to-disk is that devices will be powered-off, so
the UFS device should be put in PowerDown mode. If spm_lvl is not 5, then
that will not happen. Change the pm callbacks to force spm_lvl 5 for
suspend-to-disk poweroff.
Link: https://lore.kernel.org/r/20201207083120.26732-3-adrian.hunter@intel.com
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
[ Upstream commit 1fa0570002e3f66db9b58c32c60de4183b857a19 ]
Change dev_err() print message from "dme-reset" to "dme_enable" in function
ufshcd_dme_enable().
Link: https://lore.kernel.org/r/20201207190137.6858-3-huobean@gmail.com
Acked-by: Alim Akhtar <alim.akhtar@samsung.com>
Acked-by: Avri Altman <avri.altman@wdc.com>
Signed-off-by: Bean Huo <beanhuo@micron.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
commit e5785d3ec32f5f44dd88cd7b398e496742630469 upstream.
Commit 9816ef6ecb ("scsi: lpfc: Use after free in lpfc_rq_buf_free()")
was made to correct a use after free condition in lpfc_rq_buf_free().
Unfortunately, a subsequent patch cut on a tree without the fix
inadvertently reverted the fix.
Put the fix back: Move the freeing of the rqb_entry to after the print
function that references it.
Link: https://lore.kernel.org/r/20201020202719.54726-4-james.smart@broadcom.com
Fixes: 411de511c6 ("scsi: lpfc: Fix RQ empty firmware trap")
Cc: <stable@vger.kernel.org> # v4.17+
Signed-off-by: James Smart <james.smart@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 62e3a931db60daf94fdb3159d685a5bc6ad4d0cf upstream.
The following calltrace was seen:
BUG: sleeping function called from invalid context at mm/slab.h:494
...
Call Trace:
dump_stack+0x9a/0xf0
___might_sleep.cold.63+0x13d/0x178
slab_pre_alloc_hook+0x6a/0x90
kmem_cache_alloc_trace+0x3a/0x2d0
lpfc_sli4_nvmet_alloc+0x4c/0x280 [lpfc]
lpfc_post_rq_buffer+0x2e7/0xa60 [lpfc]
lpfc_sli4_hba_setup+0x6b4c/0xa4b0 [lpfc]
lpfc_pci_probe_one_s4.isra.15+0x14f8/0x2280 [lpfc]
lpfc_pci_probe_one+0x260/0x2880 [lpfc]
local_pci_probe+0xd4/0x180
work_for_cpu_fn+0x51/0xa0
process_one_work+0x8f0/0x17b0
worker_thread+0x536/0xb50
kthread+0x30c/0x3d0
ret_from_fork+0x3a/0x50
A prior patch introduced a spin_lock_irqsave(hbalock) in the
lpfc_post_rq_buffer() routine. Call trace is seen as the hbalock is held
with interrupts disabled during a GFP_KERNEL allocation in
lpfc_sli4_nvmet_alloc().
Fix by reordering locking so that hbalock not held when calling
sli4_nvmet_alloc() (aka rqb_buf_list()).
Link: https://lore.kernel.org/r/20201020202719.54726-2-james.smart@broadcom.com
Fixes: 411de511c6 ("scsi: lpfc: Fix RQ empty firmware trap")
Cc: <stable@vger.kernel.org> # v4.17+
Co-developed-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <james.smart@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
[ Upstream commit d4fc94fe65578738ded138e9fce043db6bfc3241 ]
Return a negative error code from the error handling case instead of 0 as
done elsewhere in this function.
Link: https://lore.kernel.org/r/1607068060-31203-1-git-send-email-zhangchangzhong@huawei.com
Fixes: 5df6d737dd ("[SCSI] fnic: Add new Cisco PCI-Express FCoE HBA")
Reported-by: Hulk Robot <hulkci@huawei.com>
Reviewed-by: Karan Tilak Kumar <kartilak@cisco.com>
Signed-off-by: Zhang Changzhong <zhangchangzhong@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
[ Upstream commit 97031ccffa4f62728602bfea8439dd045cd3aeb2 ]
The driver did not return an error in the case where
pm8001_configure_phy_settings() failed.
Use rc to store the return value of pm8001_configure_phy_settings().
Link: https://lore.kernel.org/r/20201205115551.2079471-1-zhangqilong3@huawei.com
Fixes: 279094079a ("[SCSI] pm80xx: Phy settings support for motherboard controller.")
Acked-by: Jack Wang <jinpu.wang@cloud.ionos.com>
Signed-off-by: Zhang Qilong <zhangqilong3@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
[ Upstream commit 62eebd5247c4e4ce08826ad5995cf4dd7ce919dd ]
Add the missing destroy_workqueue() before return from __qedi_probe in the
error handling case when fails to create workqueue qedi->offload_thread.
Link: https://lore.kernel.org/r/20201109091518.55941-1-miaoqinglang@huawei.com
Fixes: ace7f46ba5 ("scsi: qedi: Add QLogic FastLinQ offload iSCSI driver framework.")
Reviewed-by: Mike Christie <michael.christie@oracle.com>
Signed-off-by: Qinglang Miao <miaoqinglang@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
[ Upstream commit 2e4209b3806cda9b89c30fd5e7bfecb7044ec78b ]
The current implementation of scsi_vpd_lun_id() uses the designator length
as an implicit measure of priority. This works most of the time, but not
always. For example, some Hitachi storage arrays return this in VPD 0x83:
VPD INQUIRY: Device Identification page
Designation descriptor number 1, descriptor length: 24
designator_type: T10 vendor identification, code_set: ASCII
associated with the Addressed logical unit
vendor id: HITACHI
vendor specific: 5030C3502025
Designation descriptor number 2, descriptor length: 6
designator_type: vendor specific [0x0], code_set: Binary
associated with the Target port
vendor specific: 08 03
Designation descriptor number 3, descriptor length: 20
designator_type: NAA, code_set: Binary
associated with the Addressed logical unit
NAA 6, IEEE Company_id: 0x60e8
Vendor Specific Identifier: 0x7c35000
Vendor Specific Identifier Extension: 0x30c35000002025
[0x60060e8007c350000030c35000002025]
The current code would use the first descriptor because it's longer than
the NAA descriptor. But this is wrong, the kernel is supposed to prefer NAA
descriptors over T10 vendor ID. Designator length should only be used to
compare designators of the same type.
This patch addresses the issue by separating designator priority and
length.
Link: https://lore.kernel.org/r/20201029170846.14786-1-mwilck@suse.com
Fixes: 9983bed390 ("scsi: Add scsi_vpd_lun_id()")
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin Wilck <mwilck@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
commit 381d34e376e3d9d27730fda8a0e870600e6c8196 upstream.
It sounds unwise to let user space pass an unchecked 32-bit offset into a
kernel structure in an ioctl. This is an unsigned variable, so checking the
upper bound for the size of the structure it points into is sufficient to
avoid data corruption, but as the pointer might also be unaligned, it has
to be written carefully as well.
While I stumbled over this problem by reading the code, I did not continue
checking the function for further problems like it.
Link: https://lore.kernel.org/r/20201030164450.1253641-2-arnd@kernel.org
Fixes: c4a3e0a529 ("[SCSI] MegaRAID SAS RAID: new driver")
Cc: <stable@vger.kernel.org> # v2.6.15+
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
[ Upstream commit 85dad327d9 ]
Currently the IOCInit request message timeout is set to 10s. This is not
sufficient in some scenarios such as during HBA FW downgrade operations.
Increase the IOCInit request timeout to 30s.
Link: https://lore.kernel.org/r/20201130082733.26120-1-sreekanth.reddy@broadcom.com
Signed-off-by: Sreekanth Reddy <sreekanth.reddy@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
commit eeaf06af6f upstream.
My patch caused kernel Oopses and delays in boot. Revert it.
The problem was that I moved the "mem->dma = paddr;" before the call to
be_fill_queue(). But the first thing that the be_fill_queue() function
does is memset the whole struct to zero which overwrites the assignment.
Link: https://lore.kernel.org/r/X8jXkt6eThjyVP1v@mwanda
Fixes: 38b2db564d ("scsi: be2iscsi: Fix a theoretical leak in beiscsi_create_eqs()")
Cc: stable <stable@vger.kernel.org>
Reported-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
[ Upstream commit 73cc291c27 ]
If someone plays with the UFS clk scaling devfreq governor through sysfs,
ufshcd_devfreq_scale may be called even when HBA is not runtime ACTIVE.
This can lead to unexpected error. We cannot just protect it by calling
pm_runtime_get_sync() because that may cause a race condition since HBA
runtime suspend ops need to suspend clk scaling. To fix this call
pm_runtime_get_noresume() and check HBA's runtime status. Only proceed if
HBA is runtime ACTIVE, otherwise just bail.
governor_store
devfreq_performance_handler
update_devfreq
devfreq_set_target
ufshcd_devfreq_target
ufshcd_devfreq_scale
Link: https://lore.kernel.org/r/1600758548-28576-1-git-send-email-cang@codeaurora.org
Reviewed-by: Stanley Chu <stanley.chu@mediatek.com>
Signed-off-by: Can Guo <cang@codeaurora.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
commit 42f687038b upstream.
Commit c1a6c5ac42 ("scsi: mpt3sas: For NVME device, issue a protocol
level reset") modified the ioctl path 'timeout' variable type to u8 from
unsigned long, limiting the maximum timeout value that the driver can
support to 255 seconds.
If the management application is requesting a higher value the resulting
timeout will be zero. The operation times out immediately and the ioctl
request fails.
Change datatype back to unsigned long.
Link: https://lore.kernel.org/r/20201125094838.4340-1-suganath-prabu.subramani@broadcom.com
Fixes: c1a6c5ac42 ("scsi: mpt3sas: For NVME device, issue a protocol level reset")
Cc: <stable@vger.kernel.org> #v4.18+
Signed-off-by: Suganath Prabu S <suganath-prabu.subramani@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
[ Upstream commit e92643db51 ]
If UFS host device is in runtime-suspended state while UFS shutdown
callback is invoked, UFS device shall be resumed for register
accesses. Currently only UFS local runtime resume function will be invoked
to wake up the host. This is not enough because if someone triggers
runtime resume from block layer, then race may happen between shutdown and
runtime resume flow, and finally lead to unlocked register access.
To fix this, in ufshcd_shutdown(), use pm_runtime_get_sync() instead of
resuming UFS device by ufshcd_runtime_resume() "internally" to let runtime
PM framework manage the whole resume flow.
Link: https://lore.kernel.org/r/20201119062916.12931-1-stanley.chu@mediatek.com
Fixes: 57d104c153 ("ufs: add UFS power management support")
Reviewed-by: Can Guo <cang@codeaurora.org>
Signed-off-by: Stanley Chu <stanley.chu@mediatek.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
[ Upstream commit fe0a8a95e7 ]
iSCSI NOPs are sometimes "lost", mistakenly sent to the user-land iscsid
daemon instead of handled in the kernel, as they should be, resulting in a
message from the daemon like:
iscsid: Got nop in, but kernel supports nop handling.
This can occur because of the new forward- and back-locks, and the fact
that an iSCSI NOP response can occur before processing of the NOP send is
complete. This can result in "conn->ping_task" being NULL in
iscsi_nop_out_rsp(), when the pointer is actually in the process of being
set.
To work around this, we add a new state to the "ping_task" pointer. In
addition to NULL (not assigned) and a pointer (assigned), we add the state
"being set", which is signaled with an INVALID pointer (using "-1").
Link: https://lore.kernel.org/r/20201106193317.16993-1-leeman.duncan@gmail.com
Reviewed-by: Mike Christie <michael.christie@oracle.com>
Signed-off-by: Lee Duncan <lduncan@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
[ Upstream commit da3fecb004 ]
The scsi_block_reqs_cnt increased in ufshcd_hold() is supposed to be
decreased back in ufshcd_ungate_work() in a paired way. However, if
specific ufshcd_hold/release sequences are met, it is possible that
scsi_block_reqs_cnt is increased twice but only one ungate work is
queued. To make sure scsi_block_reqs_cnt is handled by ufshcd_hold() and
ufshcd_ungate_work() in a paired way, increase it only if queue_work()
returns true.
Link: https://lore.kernel.org/r/1604384682-15837-2-git-send-email-cang@codeaurora.org
Reviewed-by: Hongwu Su <hongwus@codeaurora.org>
Reviewed-by: Stanley Chu <stanley.chu@mediatek.com>
Reviewed-by: Bean Huo <beanhuo@micron.com>
Signed-off-by: Can Guo <cang@codeaurora.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
[ Upstream commit 5feed64f91 ]
While reenabling the IRQ after irq poll there may be small time window
where HBA firmware has posted some replies and raise the interrupts but
driver has not received the interrupts. So we may observe I/O timeouts as
the driver has not processed the replies as interrupts got missed while
reenabling the IRQ.
To fix this issue the driver has to go for one more round of processing the
reply descriptors from reply descriptor post queue after enabling the IRQ.
Link: https://lore.kernel.org/r/20201102072746.27410-1-sreekanth.reddy@broadcom.com
Reported-by: Tomas Henzl <thenzl@redhat.com>
Reviewed-by: Tomas Henzl <thenzl@redhat.com>
Signed-off-by: Sreekanth Reddy <sreekanth.reddy@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
[ Upstream commit 5faf50e9e9 ]
alua_bus_detach() might be running concurrently with alua_rtpg_work(), so
we might trip over h->sdev == NULL and call BUG_ON(). The correct way of
handling it is to not set h->sdev to NULL in alua_bus_detach(), and call
rcu_synchronize() before the final delete to ensure that all concurrent
threads have left the critical section. Then we can get rid of the
BUG_ON() and replace it with a simple if condition.
Link: https://lore.kernel.org/r/1600167537-12509-1-git-send-email-jitendra.khasdev@oracle.com
Link: https://lore.kernel.org/r/20200924104559.26753-1-hare@suse.de
Cc: Brian Bunker <brian@purestorage.com>
Acked-by: Brian Bunker <brian@purestorage.com>
Tested-by: Jitendra Khasdev <jitendra.khasdev@oracle.com>
Reviewed-by: Jitendra Khasdev <jitendra.khasdev@oracle.com>
Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
[ Upstream commit af61bc1e33 ]
When hpsa_scsi_add_host() fails, h->lastlogicals is leaked since it is
missing a free() in the error handler.
Fix this by adding free() when hpsa_scsi_add_host() fails.
Link: https://lore.kernel.org/r/20201027073125.14229-1-keitasuzuki.park@sslab.ics.keio.ac.jp
Tested-by: Don Brace <don.brace@microchip.com>
Acked-by: Don Brace <don.brace@microchip.com>
Signed-off-by: Keita Suzuki <keitasuzuki.park@sslab.ics.keio.ac.jp>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
[ Upstream commit 665e0224a3 ]
After a loss of transport due to an adapter migration or crash/disconnect
from the host partner there is a tiny window where we can race adjusting
the request_limit of the adapter. The request limit is atomically
increased/decreased to track the number of inflight requests against the
allowed limit of our VIOS partner.
After a transport loss we set the request_limit to zero to reflect this
state. However, there is a window where the adapter may attempt to queue a
command because the transport loss event hasn't been fully processed yet
and request_limit is still greater than zero. The hypercall to send the
event will fail and the error path will increment the request_limit as a
result. If the adapter processes the transport event prior to this
increment the request_limit becomes out of sync with the adapter state and
can result in SCSI commands being submitted on the now reset connection
prior to an SRP Login resulting in a protocol violation.
Fix this race by protecting request_limit with the host lock when changing
the value via atomic_set() to indicate no transport.
Link: https://lore.kernel.org/r/20201025001355.4527-1-tyreld@linux.ibm.com
Signed-off-by: Tyrel Datwyler <tyreld@linux.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
[ Upstream commit 831e3405c2 ]
The current scanning mechanism is supposed to fall back to a synchronous
host scan if an asynchronous scan is in progress. However, this rule isn't
strictly respected, scsi_prep_async_scan() doesn't hold scan_mutex when
checking shost->async_scan. When scsi_scan_host() is called concurrently,
two async scans on same host can be started and a hang in do_scan_async()
is observed.
Fixes this issue by checking & setting shost->async_scan atomically with
shost->scan_mutex.
Link: https://lore.kernel.org/r/20201010032539.426615-1-ming.lei@redhat.com
Cc: Christoph Hellwig <hch@lst.de>
Cc: Ewan D. Milne <emilne@redhat.com>
Cc: Hannes Reinecke <hare@suse.de>
Cc: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Lee Duncan <lduncan@suse.com>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
[ Upstream commit 89dd87acd4 ]
If ufs_qcom_dump_dbg_regs() calls ufs_qcom_testbus_config() from
ufshcd_suspend/resume and/or clk gate/ungate context, pm_runtime_get_sync()
and ufshcd_hold() will cause a race condition. Fix this by removing the
unnecessary calls of pm_runtime_get_sync() and ufshcd_hold().
Link: https://lore.kernel.org/r/1596975355-39813-3-git-send-email-cang@codeaurora.org
Reviewed-by: Hongwu Su <hongwus@codeaurora.org>
Reviewed-by: Avri Altman <avri.altman@wdc.com>
Reviewed-by: Bean Huo <beanhuo@micron.com>
Reviewed-by: Asutosh Das <asutoshd@codeaurora.org>
Signed-off-by: Can Guo <cang@codeaurora.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
[ Upstream commit 9e68cccc8e ]
Eliminate kernel panics when getting invalid responses from controller.
Take controller offline instead of causing kernel panics.
Link: https://lore.kernel.org/r/159622929306.30579.16523318707596752828.stgit@brunhilda
Reviewed-by: Scott Teel <scott.teel@microsemi.com>
Reviewed-by: Scott Benesh <scott.benesh@microsemi.com>
Reviewed-by: Prasad Munirathnam <Prasad.Munirathnam@microsemi.com>
Reviewed-by: Martin Wilck <mwilck@suse.com>
Signed-off-by: Kevin Barnett <kevin.barnett@microsemi.com>
Signed-off-by: Don Brace <don.brace@microsemi.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
[ Upstream commit 28b35d17f9 ]
While aborting the I/O, the firmware cleanup task timed out and driver
deleted the I/O from active command list. Some time later the firmware
sent the cleanup task response and driver again deleted the I/O from
active command list causing firmware to send completion for non-existent
I/O and list_del corruption of active command list.
Add fix to check if I/O is present before deleting it from the active
command list to ensure firmware sends valid I/O completion and protect
against list_del corruption.
Link: https://lore.kernel.org/r/20200908095657.26821-4-mrangankar@marvell.com
Signed-off-by: Nilesh Javali <njavali@marvell.com>
Signed-off-by: Manish Rangankar <mrangankar@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
[ Upstream commit c0650e2844 ]
Protect active command list for non-I/O commands like login response,
logout response, text response, and recovery cleanup of active list to
avoid list corruption.
Link: https://lore.kernel.org/r/20200908095657.26821-5-mrangankar@marvell.com
Signed-off-by: Nilesh Javali <njavali@marvell.com>
Signed-off-by: Manish Rangankar <mrangankar@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
[ Upstream commit 10aff62fab ]
If SUCCESS is not returned, error handling will escalate. Return SUCCESS
similar to other conditions in this function.
Link: https://lore.kernel.org/r/20200907121443.5150-6-jhasan@marvell.com
Signed-off-by: Saurav Kashyap <skashyap@marvell.com>
Signed-off-by: Javed Hasan <jhasan@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
[ Upstream commit c0014f9421 ]
Emit a warning when ->done or ->free are called on an already freed
srb. There is a hidden use-after-free bug in the driver which corrupts
the srb memory pool which originates from the cleanup callbacks.
An extensive search didn't bring any lights on the real problem. The
initial fix was to set both pointers to NULL and try to catch invalid
accesses. But instead the memory corruption was gone and the driver
didn't crash. Since not all calling places check for NULL pointer, add
explicitly default handlers. With this we workaround the memory
corruption and add a debug help.
Link: https://lore.kernel.org/r/20200908081516.8561-2-dwagner@suse.de
Reviewed-by: Martin Wilck <mwilck@suse.com>
Reviewed-by: Arun Easi <aeasi@marvell.com>
Signed-off-by: Daniel Wagner <dwagner@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
[ Upstream commit 055f15ab2c ]
Return PTR_ERR() from the error handling case instead of 0.
Link: https://lore.kernel.org/r/20200910123848.93649-1-jingxiangfeng@huawei.com
Signed-off-by: Jing Xiangfeng <jingxiangfeng@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
[ Upstream commit 38b2db564d ]
The be_fill_queue() function can only fail when "eq_vaddress" is NULL and
since it's non-NULL here that means the function call can't fail. But
imagine if it could, then in that situation we would want to store the
"paddr" so that dma memory can be released.
Link: https://lore.kernel.org/r/20200928091300.GD377727@mwanda
Fixes: bfead3b2cb ("[SCSI] be2iscsi: Adding msix and mcc_rings V3")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
[ Upstream commit 45181eab8b ]
_base_process_reply_queue() called from _base_interrupt() may schedule a
new irq poll. Fix this by calling synchronize_irq() first.
Also ensure that enable_irq() is called only when necessary to avoid
"Unbalanced enable for IRQ..." errors.
Link: https://lore.kernel.org/r/20200910142126.8147-1-thenzl@redhat.com
Fixes: 320e77acb3 ("scsi: mpt3sas: Irq poll to avoid CPU hard lockups")
Acked-by: Sreekanth Reddy <sreekanth.reddy@broadcom.com>
Signed-off-by: Tomas Henzl <thenzl@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
[ Upstream commit 44f4daf867 ]
On an error exit path, a negative error code should be returned instead of
a positive return value.
Link: https://lore.kernel.org/r/20200802111531.5065-1-tianjia.zhang@linux.alibaba.com
Fixes: f40e74ffa3 ("csiostor:firmware upgrade fix")
Cc: Praveen Madhavan <praveenm@chelsio.com>
Signed-off-by: Tianjia Zhang <tianjia.zhang@linux.alibaba.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
[ Upstream commit ca4fb89a3d ]
On an error exit path, a negative error code should be returned instead of
a positive return value.
Link: https://lore.kernel.org/r/20200802111530.5020-1-tianjia.zhang@linux.alibaba.com
Fixes: 8777e4314d ("scsi: qla2xxx: Migrate NVME N2N handling into state machine")
Cc: Quinn Tran <quinn.tran@cavium.com>
Signed-off-by: Tianjia Zhang <tianjia.zhang@linux.alibaba.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
[ Upstream commit bbf2d06a9d ]
In the case of a failed retry, a positive value EIO is returned here. I
think this is a typo error. It is necessary to return an error value.
[mkp: caller checks != 0 but the rest of the file uses -Exxx so fix this up
to be consistent]
Link: https://lore.kernel.org/r/20200802111528.4974-1-tianjia.zhang@linux.alibaba.com
Fixes: 0691094ff3 ("scsi: qla2xxx: Add logic to detect ABTS hang and response completion")
Cc: Quinn Tran <quinn.tran@cavium.com>
Signed-off-by: Tianjia Zhang <tianjia.zhang@linux.alibaba.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Brian King