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scsi: cxlflash: Fence EEH during probe

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An EEH during probe can lead to a crash as the recovery thread races with the
probe thread. To avoid this issue, introduce new states to fence out EEH
recovery until probe has completed. Also ensure the reset wait queue is
flushed during device removal to avoid orphaned threads.

Signed-off-by: Matthew R. Ochs <mrochs@linux.vnet.ibm.com>
Signed-off-by: Uma Krishnan <ukrishn@linux.vnet.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Matthew R. Ochs
2017-04-12 14:14:51 -05:00
committed by Martin K. Petersen
parent 1cd7fabc82
commit 323e33428e
3 changed files with 28 additions and 7 deletions
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2
drivers/scsi/cxlflash/common.h
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@@ -90,6 +90,8 @@ enum cxlflash_init_state {
};
enum cxlflash_state {
STATE_PROBING, /* Initial state during probe */
STATE_PROBED, /* Temporary state, probe completed but EEH occurred */
STATE_NORMAL, /* Normal running state, everything good */
STATE_RESET, /* Reset state, trying to reset/recover */
STATE_FAILTERM /* Failed/terminating state, error out users/threads */