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Commit 2ed1b50a authored by Brian King's avatar Brian King Committed by Greg Kroah-Hartman
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scsi: ibmvfc: Fix I/O hang when port is not mapped 



commit 07d0e9a847401ffd2f09bd450d41644cd090e81d upstream.

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.

Signed-off-by: default avatarBrian King <brking@linux.vnet.ibm.com>
Acked-by: default avatarTyrel Datwyler <tyreld@linux.vnet.ibm.com>
Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 161cbfec

drivers/scsi/ibmvscsi/ibmvfc.c

+0 −1
Original line number Diff line number Diff line
@@ -717,7 +717,6 @@ 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);