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scsi: core: Add a precondition check in scsi_eh_scmd_add()

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Calling scsi_eh_scmd_add() may cause the error handler never to be woken up
because this may result in shost->host_failed to become larger than
scsi_host_busy(shost). Hence complain if scsi_eh_scmd_add() is called after
SCMD_STATE_INFLIGHT has been cleared.

Cc: Hannes Reinecke <hare@suse.de>
Cc: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Cc: Mike Christie <michael.christie@oracle.com>
Cc: John Garry <john.g.garry@oracle.com>
Cc: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Link: https://lore.kernel.org/r/20231115193343.2262013-1-bvanassche@acm.org
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Bart Van Assche 2023-11-15 11:33:43 -08:00 committed by Martin K. Petersen
parent 0349be31e4
commit 10b53db2db
1 changed files with 1 additions and 0 deletions
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1
drivers/scsi/scsi_error.c
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@ -301,6 +301,7 @@ void scsi_eh_scmd_add(struct scsi_cmnd *scmd)
int ret;
WARN_ON_ONCE(!shost->ehandler);
WARN_ON_ONCE(!test_bit(SCMD_STATE_INFLIGHT, &scmd->state));
spin_lock_irqsave(shost->host_lock, flags);
if (scsi_host_set_state(shost, SHOST_RECOVERY)) {