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scsi: scsi_transport_srp: Don't block target in failfast state 

If the port is in SRP_RPORT_FAIL_FAST state when srp_reconnect_rport() is
entered, a transition to SDEV_BLOCK would be illegal, and a kernel WARNING
would be triggered. Skip scsi_target_block() in this case.

Link: https://lore.kernel.org/r/20210111142541.21534-1-mwilck@suse.com
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin Wilck <mwilck@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Martin Wilck 2021-01-11 15:25:41 +01:00 committed by Martin K. Petersen
parent f2cb4b2397
commit 72eeb7c715
1 changed files with 8 additions and 1 deletions
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9
drivers/scsi/scsi_transport_srp.c
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@ -541,7 +541,14 @@ int srp_reconnect_rport(struct srp_rport *rport)
res = mutex_lock_interruptible(&rport->mutex);
if (res)
goto out;
scsi_target_block(&shost->shost_gendev);
if (rport->state != SRP_RPORT_FAIL_FAST)
/*
* sdev state must be SDEV_TRANSPORT_OFFLINE, transition
* to SDEV_BLOCK is illegal. Calling scsi_target_unblock()
* later is ok though, scsi_internal_device_unblock_nowait()
* treats SDEV_TRANSPORT_OFFLINE like SDEV_BLOCK.
*/
scsi_target_block(&shost->shost_gendev);
res = rport->state != SRP_RPORT_LOST ? i->f->reconnect(rport) : -ENODEV;
pr_debug("%s (state %d): transport.reconnect() returned %d\n",
dev_name(&shost->shost_gendev), rport->state, res);