From 10b53db2db8dfda84b25833043f2b63123572af6 Mon Sep 17 00:00:00 2001 From: Bart Van Assche Date: Wed, 15 Nov 2023 11:33:43 -0800 Subject: scsi: core: Add a precondition check in scsi_eh_scmd_add() 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 Cc: Damien Le Moal Cc: Mike Christie Cc: John Garry Cc: Ming Lei Signed-off-by: Bart Van Assche Link: https://lore.kernel.org/r/20231115193343.2262013-1-bvanassche@acm.org Signed-off-by: Martin K. Petersen --- drivers/scsi/scsi_error.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/scsi/scsi_error.c b/drivers/scsi/scsi_error.c index c67cdcdc3ba8..1bac12ef238e 100644 --- a/drivers/scsi/scsi_error.c +++ b/drivers/scsi/scsi_error.c @@ -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)) { -- cgit v1.2.3