From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:57158 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751265AbdJBMau (ORCPT ); Mon, 2 Oct 2017 08:30:50 -0400 Subject: Patch "mtd: Fix partition alignment check on multi-erasesize devices" has been added to the 4.13-stable tree To: boris.brezillon@free-electrons.com, Mathias.Thore@infinera.com, gregkh@linuxfoundation.org Cc: , From: Date: Mon, 02 Oct 2017 14:30:13 +0200 Message-ID: <1506947413194210@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 mtd: Fix partition alignment check on multi-erasesize devices to the 4.13-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: mtd-fix-partition-alignment-check-on-multi-erasesize-devices.patch and it can be found in the queue-4.13 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From 7e439681af82984045efc215437ebb2ca8d33a4c Mon Sep 17 00:00:00 2001 From: Boris Brezillon Date: Mon, 25 Sep 2017 10:19:57 +0200 Subject: mtd: Fix partition alignment check on multi-erasesize devices From: Boris Brezillon commit 7e439681af82984045efc215437ebb2ca8d33a4c upstream. Commit 1eeef2d7483a ("mtd: handle partitioning on devices with 0 erasesize") introduced a regression on heterogeneous erase region devices. Alignment of the partition was tested against the master eraseblock size which can be bigger than the slave one, thus leading to some partitions being marked as read-only. Update wr_alignment to match this slave erasesize after this erasesize has been determined by picking the biggest erasesize of all the regions embedded in the MTD partition. Reported-by: Mathias Thore Fixes: 1eeef2d7483a ("mtd: handle partitioning on devices with 0 erasesize") Signed-off-by: Boris Brezillon Tested-by: Mathias Thore Reviewed-by: Mathias Thore Signed-off-by: Greg Kroah-Hartman --- drivers/mtd/mtdpart.c | 8 ++++++++ 1 file changed, 8 insertions(+) --- a/drivers/mtd/mtdpart.c +++ b/drivers/mtd/mtdpart.c @@ -581,6 +581,14 @@ static struct mtd_part *allocate_partiti slave->mtd.erasesize = parent->erasesize; } + /* + * Slave erasesize might differ from the master one if the master + * exposes several regions with different erasesize. Adjust + * wr_alignment accordingly. + */ + if (!(slave->mtd.flags & MTD_NO_ERASE)) + wr_alignment = slave->mtd.erasesize; + tmp = slave->offset; remainder = do_div(tmp, wr_alignment); if ((slave->mtd.flags & MTD_WRITEABLE) && remainder) { Patches currently in stable-queue which might be from boris.brezillon@free-electrons.com are queue-4.13/mtd-fix-partition-alignment-check-on-multi-erasesize-devices.patch queue-4.13/mtd-nand-atmel-fix-buffer-overflow-in-atmel_pmecc_user.patch