scsi: mpi3mr: Serialize admin queue BAR writes on 32-bit systems

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On 32-bit systems, 64-bit BAR writes to admin queue registers are
performed as two 32-bit writes. Without locking, this can cause partial
writes when accessed concurrently.

Updated per-queue spinlocks is used to serialize these writes and prevent
race conditions.

Fixes: 824a156633 ("scsi: mpi3mr: Base driver code")
Cc: stable@vger.kernel.org
Signed-off-by: Ranjan Kumar <ranjan.kumar@broadcom.com>
Link: https://lore.kernel.org/r/20250627194539.48851-4-ranjan.kumar@broadcom.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

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Ranjan Kumar 2025-06-28 01:15:38 +05:30 • committed by Martin K. Petersen

parent 6853885b21

commit c91e140c82

3 changed files with 17 additions and 4 deletions

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4

drivers/scsi/mpi3mr/mpi3mr.h

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15

drivers/scsi/mpi3mr/mpi3mr_fw.c

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2

drivers/scsi/mpi3mr/mpi3mr_os.c

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