From: Taras Kondratiuk <takon...@cisco.com>
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 <takon...@cisco.com>
Fixes: ce39f9d17c14 ("mmc: support packed write command for eMMC4.5 devices")
Cc: <sta...@vger.kernel.org>
Signed-off-by: Ulf Hansson <ulf.hans...@linaro.org>
Signed-off-by: Willy Tarreau <w...@1wt.eu>
---
drivers/mmc/card/block.c | 12 ++++++------
1 file changed, 6 insertions(+), 6 deletions(-)
diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c
index c6bf235..a2863b7 100644
--- a/drivers/mmc/card/block.c
+++ b/drivers/mmc/card/block.c
@@ -1582,8 +1582,8 @@ static void mmc_blk_packed_hdr_wrq_prep(struct
mmc_queue_req *mqrq,
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;
/*
@@ -1597,14 +1597,14 @@ static void mmc_blk_packed_hdr_wrq_prep(struct
mmc_queue_req *mqrq,
((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++;
}
--
2.8.0.rc2.1.gbe9624a
