scsi: mpi3mr: Use IRQ save variants of spinlock to protect chain frame allocation

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Driver uses spin lock without irqsave when it needs to acquire a chain
frame. This is done to protect chain frame allocation from multiple
submission threads. If there is any I/O queued from an interrupt context,
and if that requires a chain frame, and if the chain lock is held by the CPU
which got interrupted, then there will be a possible deadlock.

Signed-off-by: Ranjan Kumar <ranjan.kumar@broadcom.com>
Link: https://lore.kernel.org/r/20230406101819.10109-1-ranjan.kumar@broadcom.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

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Ranjan Kumar 2023-04-06 15:48:19 +05:30 • committed by Martin K. Petersen

parent b32283d753

commit 2acc635a0e

1 changed files with 3 additions and 3 deletions

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drivers/scsi/mpi3mr/mpi3mr_os.c

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