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scsi: ibmvfc: Fix I/O hang when port is not mapped

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If a VFC port gets unmapped in the VIOS, it may not respond with a CRQ
init complete following H_REG_CRQ. If this occurs, we can end up having
called scsi_block_requests and not a resulting unblock until the init
complete happens, which may never occur, and we end up hanging I/O
requests.  This patch ensures the host action stay set to
IBMVFC_HOST_ACTION_TGT_DEL so we move all rports into devloss state and
unblock unless we receive an init complete.

Cc: <[email protected]>
Signed-off-by: Brian King <[email protected]>
Acked-by: Tyrel Datwyler <[email protected]>
Signed-off-by: Martin K. Petersen <[email protected]>
This commit is contained in:
Brian King authored and Martin K. Petersen committed 2016-09-19 19:50:33 -04:00
1 parent 2f3e77323d
commit 07d0e9a847
1 file changed
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drivers/scsi/ibmvscsi/ibmvfc.c
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@@ -721,7 +721,6 @@ static int ibmvfc_reset_crq(struct ibmvfc_host *vhost)
spin_lock_irqsave(vhost->host->host_lock, flags);
vhost->state = IBMVFC_NO_CRQ;
vhost->logged_in = 0;
ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE);
/* Clean out the queue */
memset(crq->msgs, 0, PAGE_SIZE);