From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932338AbcHHTxo (ORCPT ); Mon, 8 Aug 2016 15:53:44 -0400 Received: from mail.linuxfoundation.org ([140.211.169.12]:35543 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752708AbcHHTKV (ORCPT ); Mon, 8 Aug 2016 15:10:21 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Taras Kondratiuk , Ulf Hansson Subject: [PATCH 3.14 15/21] mmc: block: fix packed command header endianness Date: Mon, 8 Aug 2016 21:09:46 +0200 Message-Id: <20160808180144.563879101@linuxfoundation.org> X-Mailer: git-send-email 2.9.2 In-Reply-To: <20160808180143.919366850@linuxfoundation.org> References: <20160808180143.919366850@linuxfoundation.org> User-Agent: quilt/0.64 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 3.14-stable review patch. If anyone has any objections, please let me know. ------------------ From: Taras Kondratiuk commit f68381a70bb2b26c31b13fdaf67c778f92fd32b4 upstream. The code that fills packed command header assumes that CPU runs in little-endian mode. Hence the header is malformed in big-endian mode and causes MMC data transfer errors: [ 563.200828] mmcblk0: error -110 transferring data, sector 2048, nr 8, cmd response 0x900, card status 0xc40 [ 563.219647] mmcblk0: packed cmd failed, nr 2, sectors 16, failure index: -1 Convert header data to LE. Signed-off-by: Taras Kondratiuk Fixes: ce39f9d17c14 ("mmc: support packed write command for eMMC4.5 devices") Signed-off-by: Ulf Hansson Signed-off-by: Greg Kroah-Hartman --- drivers/mmc/card/block.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) --- a/drivers/mmc/card/block.c +++ b/drivers/mmc/card/block.c @@ -1610,8 +1610,8 @@ static void mmc_blk_packed_hdr_wrq_prep( packed_cmd_hdr = packed->cmd_hdr; memset(packed_cmd_hdr, 0, sizeof(packed->cmd_hdr)); - packed_cmd_hdr[0] = (packed->nr_entries << 16) | - (PACKED_CMD_WR << 8) | PACKED_CMD_VER; + packed_cmd_hdr[0] = cpu_to_le32((packed->nr_entries << 16) | + (PACKED_CMD_WR << 8) | PACKED_CMD_VER); hdr_blocks = mmc_large_sector(card) ? 8 : 1; /* @@ -1625,14 +1625,14 @@ static void mmc_blk_packed_hdr_wrq_prep( ((brq->data.blocks * brq->data.blksz) >= card->ext_csd.data_tag_unit_size); /* Argument of CMD23 */ - packed_cmd_hdr[(i * 2)] = + packed_cmd_hdr[(i * 2)] = cpu_to_le32( (do_rel_wr ? MMC_CMD23_ARG_REL_WR : 0) | (do_data_tag ? MMC_CMD23_ARG_TAG_REQ : 0) | - blk_rq_sectors(prq); + blk_rq_sectors(prq)); /* Argument of CMD18 or CMD25 */ - packed_cmd_hdr[((i * 2)) + 1] = + packed_cmd_hdr[((i * 2)) + 1] = cpu_to_le32( mmc_card_blockaddr(card) ? - blk_rq_pos(prq) : blk_rq_pos(prq) << 9; + blk_rq_pos(prq) : blk_rq_pos(prq) << 9); packed->blocks += blk_rq_sectors(prq); i++; }