From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:47718 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753080AbdDCMmB (ORCPT ); Mon, 3 Apr 2017 08:42:01 -0400 Subject: Patch "scsi: libsas: fix ata xfer length" has been added to the 4.4-stable tree To: john.garry@huawei.com, gregkh@linuxfoundation.org, martin.petersen@oracle.com Cc: , From: Date: Mon, 03 Apr 2017 14:41:39 +0200 Message-ID: <14912232997753@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: libsas: fix ata xfer length to the 4.4-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-libsas-fix-ata-xfer-length.patch and it can be found in the queue-4.4 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From 9702c67c6066f583b629cf037d2056245bb7a8e6 Mon Sep 17 00:00:00 2001 From: John Garry Date: Thu, 16 Mar 2017 23:07:28 +0800 Subject: scsi: libsas: fix ata xfer length From: John Garry commit 9702c67c6066f583b629cf037d2056245bb7a8e6 upstream. The total ata xfer length may not be calculated properly, in that we do not use the proper method to get an sg element dma length. According to the code comment, sg_dma_len() should be used after dma_map_sg() is called. This issue was found by turning on the SMMUv3 in front of the hisi_sas controller in hip07. Multiple sg elements were being combined into a single element, but the original first element length was being use as the total xfer length. Fixes: ff2aeb1eb64c8a4770a6 ("libata: convert to chained sg") Signed-off-by: John Garry Signed-off-by: Martin K. Petersen Signed-off-by: Greg Kroah-Hartman --- drivers/scsi/libsas/sas_ata.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/scsi/libsas/sas_ata.c +++ b/drivers/scsi/libsas/sas_ata.c @@ -218,7 +218,7 @@ static unsigned int sas_ata_qc_issue(str task->num_scatter = qc->n_elem; } else { for_each_sg(qc->sg, sg, qc->n_elem, si) - xfer += sg->length; + xfer += sg_dma_len(sg); task->total_xfer_len = xfer; task->num_scatter = si; Patches currently in stable-queue which might be from john.garry@huawei.com are queue-4.4/scsi-libsas-fix-ata-xfer-length.patch