From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:56645 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S934868AbcJTPzD (ORCPT ); Thu, 20 Oct 2016 11:55:03 -0400 Subject: Patch "scsi: ibmvfc: Fix I/O hang when port is not mapped" has been added to the 4.8-stable tree To: brking@linux.vnet.ibm.com, gregkh@linuxfoundation.org, martin.petersen@oracle.com, tyreld@linux.vnet.ibm.com Cc: , From: Date: Thu, 20 Oct 2016 17:54:10 +0200 Message-ID: <147697885095211@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: 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 4.8-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-4.8 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From 07d0e9a847401ffd2f09bd450d41644cd090e81d Mon Sep 17 00:00:00 2001 From: Brian King Date: Mon, 19 Sep 2016 08:59:19 -0500 Subject: scsi: ibmvfc: Fix I/O hang when port is not mapped From: Brian King 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 Acked-by: Tyrel Datwyler Signed-off-by: Martin K. Petersen Signed-off-by: Greg Kroah-Hartman --- 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@linux.vnet.ibm.com are queue-4.8/scsi-ibmvfc-fix-i-o-hang-when-port-is-not-mapped.patch