From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:50218 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1030532AbeBNO0p (ORCPT ); Wed, 14 Feb 2018 09:26:45 -0500 Subject: Patch "mtd: nand: Fix nand_do_read_oob() return value" has been added to the 4.15-stable tree To: miquel.raynal@free-electrons.com, boris.brezillon@free-electrons.com, gregkh@linuxfoundation.org Cc: , From: Date: Wed, 14 Feb 2018 15:26:24 +0100 Message-ID: <15186183849184@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: nand: Fix nand_do_read_oob() return value to the 4.15-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-nand-fix-nand_do_read_oob-return-value.patch and it can be found in the queue-4.15 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From 87e89ce8d0d14f573c068c61bec2117751fb5103 Mon Sep 17 00:00:00 2001 From: Miquel Raynal Date: Fri, 12 Jan 2018 10:13:36 +0100 Subject: mtd: nand: Fix nand_do_read_oob() return value From: Miquel Raynal commit 87e89ce8d0d14f573c068c61bec2117751fb5103 upstream. Starting from commit 041e4575f034 ("mtd: nand: handle ECC errors in OOB"), nand_do_read_oob() (from the NAND core) did return 0 or a negative error, and the MTD layer expected it. However, the trend for the NAND layer is now to return an error or a positive number of bitflips. Deciding which status to return to the user belongs to the MTD layer. Commit e47f68587b82 ("mtd: check for max_bitflips in mtd_read_oob()") brought this logic to the mtd_read_oob() function while the return value coming from nand_do_read_oob() (called by the ->_read_oob() hook) was left unchanged. Fixes: e47f68587b82 ("mtd: check for max_bitflips in mtd_read_oob()") Signed-off-by: Miquel Raynal Signed-off-by: Boris Brezillon Signed-off-by: Greg Kroah-Hartman --- drivers/mtd/nand/nand_base.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) --- a/drivers/mtd/nand/nand_base.c +++ b/drivers/mtd/nand/nand_base.c @@ -2199,6 +2199,7 @@ EXPORT_SYMBOL(nand_write_oob_syndrome); static int nand_do_read_oob(struct mtd_info *mtd, loff_t from, struct mtd_oob_ops *ops) { + unsigned int max_bitflips = 0; int page, realpage, chipnr; struct nand_chip *chip = mtd_to_nand(mtd); struct mtd_ecc_stats stats; @@ -2256,6 +2257,8 @@ static int nand_do_read_oob(struct mtd_i nand_wait_ready(mtd); } + max_bitflips = max_t(unsigned int, max_bitflips, ret); + readlen -= len; if (!readlen) break; @@ -2281,7 +2284,7 @@ static int nand_do_read_oob(struct mtd_i if (mtd->ecc_stats.failed - stats.failed) return -EBADMSG; - return mtd->ecc_stats.corrected - stats.corrected ? -EUCLEAN : 0; + return max_bitflips; } /** Patches currently in stable-queue which might be from miquel.raynal@free-electrons.com are queue-4.15/mtd-nand-sunxi-fix-ecc-strength-choice.patch queue-4.15/mtd-nand-fix-nand_do_read_oob-return-value.patch