This is a note to let you know that I've just added the patch titled scsi: ibmvfc: Fix I/O hang when port is not mapped to the 4.7-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: scsi-ibmvfc-fix-i-o-hang-when-port-is-not-mapped.patch and it can be found in the queue-4.7 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From 07d0e9a847401ffd2f09bd450d41644cd090e81d Mon Sep 17 00:00:00 2001 From: Brian King <brking@xxxxxxxxxxxxxxxxxx> Date: Mon, 19 Sep 2016 08:59:19 -0500 Subject: scsi: ibmvfc: Fix I/O hang when port is not mapped From: Brian King <brking@xxxxxxxxxxxxxxxxxx> 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: Brian King <brking@xxxxxxxxxxxxxxxxxx> Acked-by: Tyrel Datwyler <tyreld@xxxxxxxxxxxxxxxxxx> Signed-off-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/scsi/ibmvscsi/ibmvfc.c | 1 - 1 file changed, 1 deletion(-) --- a/drivers/scsi/ibmvscsi/ibmvfc.c +++ b/drivers/scsi/ibmvscsi/ibmvfc.c @@ -717,7 +717,6 @@ static int ibmvfc_reset_crq(struct ibmvf 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); Patches currently in stable-queue which might be from brking@xxxxxxxxxxxxxxxxxx are queue-4.7/scsi-ibmvfc-fix-i-o-hang-when-port-is-not-mapped.patch -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html