From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:47237 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932088AbcGKXtP (ORCPT ); Mon, 11 Jul 2016 19:49:15 -0400 Subject: Patch "sd: Fix rw_max for devices that report an optimal xfer size" has been added to the 4.6-stable tree To: martin.petersen@oracle.com, andrew.patterson@hpe.com, bart.vanassche@sandisk.com, famz@redhat.com, gregkh@linuxfoundation.org, hch@lst.de Cc: , From: Date: Mon, 11 Jul 2016 15:48:29 -0700 Message-ID: <1468277309171184@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 sd: Fix rw_max for devices that report an optimal xfer size to the 4.6-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: sd-fix-rw_max-for-devices-that-report-an-optimal-xfer-size.patch and it can be found in the queue-4.6 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From 6b7e9cde49691e04314342b7dce90c67ad567fcc Mon Sep 17 00:00:00 2001 From: "Martin K. Petersen" Date: Thu, 12 May 2016 22:17:34 -0400 Subject: sd: Fix rw_max for devices that report an optimal xfer size From: Martin K. Petersen commit 6b7e9cde49691e04314342b7dce90c67ad567fcc upstream. For historic reasons, io_opt is in bytes and max_sectors in block layer sectors. This interface inconsistency is error prone and should be fixed. But for 4.4--4.7 let's make the unit difference explicit via a wrapper function. Fixes: d0eb20a863ba ("sd: Optimal I/O size is in bytes, not sectors") Reported-by: Fam Zheng Reviewed-by: Bart Van Assche Reviewed-by: Christoph Hellwig Tested-by: Andrew Patterson Signed-off-by: Martin K. Petersen Signed-off-by: Greg Kroah-Hartman --- drivers/scsi/sd.c | 8 ++++---- drivers/scsi/sd.h | 5 +++++ 2 files changed, 9 insertions(+), 4 deletions(-) --- a/drivers/scsi/sd.c +++ b/drivers/scsi/sd.c @@ -2862,10 +2862,10 @@ static int sd_revalidate_disk(struct gen if (sdkp->opt_xfer_blocks && sdkp->opt_xfer_blocks <= dev_max && sdkp->opt_xfer_blocks <= SD_DEF_XFER_BLOCKS && - sdkp->opt_xfer_blocks * sdp->sector_size >= PAGE_SIZE) - rw_max = q->limits.io_opt = - sdkp->opt_xfer_blocks * sdp->sector_size; - else + logical_to_bytes(sdp, sdkp->opt_xfer_blocks) >= PAGE_SIZE) { + q->limits.io_opt = logical_to_bytes(sdp, sdkp->opt_xfer_blocks); + rw_max = logical_to_sectors(sdp, sdkp->opt_xfer_blocks); + } else rw_max = BLK_DEF_MAX_SECTORS; /* Combine with controller limits */ --- a/drivers/scsi/sd.h +++ b/drivers/scsi/sd.h @@ -151,6 +151,11 @@ static inline sector_t logical_to_sector return blocks << (ilog2(sdev->sector_size) - 9); } +static inline unsigned int logical_to_bytes(struct scsi_device *sdev, sector_t blocks) +{ + return blocks * sdev->sector_size; +} + /* * A DIF-capable target device can be formatted with different * protection schemes. Currently 0 through 3 are defined: Patches currently in stable-queue which might be from martin.petersen@oracle.com are queue-4.6/sd-fix-rw_max-for-devices-that-report-an-optimal-xfer-size.patch