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| author | Justin Tee <justin.tee@broadcom.com> | 2024-10-31 23:32:15 +0100 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2024-11-03 02:45:24 +0100 |
| commit | 4281f44ea8bfedd25938a0031bebba1473ece9ad (patch) | |
| tree | e66f7e4458cc0ad3c9ff31b083093e6642638394 /drivers/scsi/hpsa_cmd.h | |
| parent | scsi: lpfc: Add cleanup of nvmels_wq after HBA reset (diff) | |
| download | linux-4281f44ea8bfedd25938a0031bebba1473ece9ad.tar.xz linux-4281f44ea8bfedd25938a0031bebba1473ece9ad.zip | |
scsi: lpfc: Prevent NDLP reference count underflow in dev_loss_tmo callback
Current dev_loss_tmo handling checks whether there has been a previous
call to unregister with SCSI transport. If so, the NDLP kref count is
decremented a second time in dev_loss_tmo as the final kref release.
However, this can sometimes result in a reference count underflow if
there is also a race to unregister with NVMe transport as well. Add a
check for NVMe transport registration before decrementing the final
kref. If NVMe transport is still registered, then the NVMe transport
unregistration is designated as the final kref decrement.
Signed-off-by: Justin Tee <justin.tee@broadcom.com>
Link: https://lore.kernel.org/r/20241031223219.152342-8-justintee8345@gmail.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/hpsa_cmd.h')
0 files changed, 0 insertions, 0 deletions