From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail333.us4.mandrillapp.com ([205.201.137.77]:37125 "EHLO mail333.us4.mandrillapp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752719AbcCAIQZ (ORCPT ); Tue, 1 Mar 2016 03:16:25 -0500 Received: from pmta03.dal05.mailchimp.com (127.0.0.1) by mail333.us4.mandrillapp.com id hql7ti174nor for ; Tue, 1 Mar 2016 08:16:03 +0000 (envelope-from ) From: Subject: Patch "megaraid_sas: Do not use PAGE_SIZE for max_sectors" has been added to the 3.10-stable tree To: , , , , Cc: , Message-Id: <1456817608216185@kroah.com> Date: Tue, 01 Mar 2016 08:16:03 +0000 MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Sender: stable-owner@vger.kernel.org List-ID: This is a note to let you know that I've just added the patch titled megaraid_sas: Do not use PAGE_SIZE for max_sectors to the 3.10-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: megaraid_sas-do-not-use-page_size-for-max_sectors.patch and it can be found in the queue-3.10 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From 357ae967ad66e357f78b5cfb5ab6ca07fb4a7758 Mon Sep 17 00:00:00 2001 From: "sumit.saxena@avagotech.com" Date: Thu, 15 Oct 2015 13:40:04 +0530 Subject: megaraid_sas: Do not use PAGE_SIZE for max_sectors From: sumit.saxena@avagotech.com commit 357ae967ad66e357f78b5cfb5ab6ca07fb4a7758 upstream. Do not use PAGE_SIZE marco to calculate max_sectors per I/O request. Driver code assumes PAGE_SIZE will be always 4096 which can lead to wrongly calculated value if PAGE_SIZE is not 4096. This issue was reported in Ubuntu Bugzilla Bug #1475166. Signed-off-by: Sumit Saxena Signed-off-by: Kashyap Desai Reviewed-by: Tomas Henzl Reviewed-by: Martin K. Petersen Signed-off-by: Martin K. Petersen Signed-off-by: Greg Kroah-Hartman --- drivers/scsi/megaraid/megaraid_sas.h | 2 ++ drivers/scsi/megaraid/megaraid_sas_base.c | 2 +- 2 files changed, 3 insertions(+), 1 deletion(-) --- a/drivers/scsi/megaraid/megaraid_sas.h +++ b/drivers/scsi/megaraid/megaraid_sas.h @@ -300,6 +300,8 @@ enum MR_EVT_ARGS { MR_EVT_ARGS_GENERIC, }; + +#define SGE_BUFFER_SIZE 4096 /* * define constants for device list query options */ --- a/drivers/scsi/megaraid/megaraid_sas_base.c +++ b/drivers/scsi/megaraid/megaraid_sas_base.c @@ -3602,7 +3602,7 @@ static int megasas_init_fw(struct megasa } instance->max_sectors_per_req = instance->max_num_sge * - PAGE_SIZE / 512; + SGE_BUFFER_SIZE / 512; if (tmp_sectors && (instance->max_sectors_per_req > tmp_sectors)) instance->max_sectors_per_req = tmp_sectors; Patches currently in stable-queue which might be from sumit.saxena@avagotech.com are queue-3.10/megaraid_sas-smap-restriction-do-not-access-user-memory-from-ioctl-code.patch queue-3.10/megaraid_sas-do-not-use-page_size-for-max_sectors.patch