scsi: ufs: core: Fix synchronization between scsi_unjam_host() and ufshcd_queuecommand()

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The SCSI error handler calls scsi_unjam_host() which can call the queue
function ufshcd_queuecommand() indirectly. The error handler changes the
state to UFSHCD_STATE_RESET while running, but error interrupts that
happen while the error handler is running could change the state to
UFSHCD_STATE_EH_SCHEDULED_NON_FATAL which would allow requests to go
through ufshcd_queuecommand() even though the error handler is running.
Block that hole by checking whether the error handler is in progress.

Link: https://lore.kernel.org/r/20211008084048.257498-1-adrian.hunter@intel.com
Reviewed-by: Asutosh Das <asutoshd@codeaurora.org>
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

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Adrian Hunter 2021-10-08 11:40:48 +03:00 • committed by Martin K. Petersen

parent 9561f58442

commit d489f18ad1

1 changed files with 12 additions and 0 deletions

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drivers/scsi/ufs/ufshcd.c

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