scsi: megaraid_sas: Release Mutex lock before OCR in case of DCMD timeout

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Issue: There is possibility of few DCMDs timing out with 'reset_mutex' lock
held. As part of DCMD timeout handling, driver calls function
megasas_reset_fusion which also tries to acquire same lock 'reset_mutex'
and end up with deadlock.

Fix: Upon timeout of DCMDs (which are fired with 'reset_mutex' lock held),
driver will release 'reset_mutex' before calling OCR function and will
acquire lock again after OCR function returns.

Signed-off-by: Sumit Saxena <sumit.saxena@broadcom.com>
Signed-off-by: Chandrakanth Patil <chandrakanth.patil@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

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Chandrakanth Patil 2019-06-25 16:34:23 +05:30 • committed by Martin K. Petersen

parent a6ffd5bf68

commit 7fa3174b3e

1 changed files with 13 additions and 0 deletions

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drivers/scsi/megaraid/megaraid_sas_base.c

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