linux-kernel - [PATCH 4.4 105/132] mmc: block: Fix tag condition with packed writes

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Message-Id: <20191127203025.855011718@linuxfoundation.org>
Date:   Wed, 27 Nov 2019 21:31:36 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Adrian Hunter <adrian.hunter@...el.com>,
        Shawn Lin <shawn.lin@...k-chips.com>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        Lee Jones <lee.jones@...aro.org>
Subject: [PATCH 4.4 105/132] mmc: block: Fix tag condition with packed writes

From: Adrian Hunter <adrian.hunter@...el.com>

commit d806b46e5f496a6335ebd7f8432d2533507ce9a2 upstream.

Apparently a cut-and-paste error, 'do_data_tag' is using 'brq' for data
size even though 'brq' has not been set up. Instead use blk_rq_sectors().

Signed-off-by: Adrian Hunter <adrian.hunter@...el.com>
Reviewed-by: Shawn Lin <shawn.lin@...k-chips.com>
Signed-off-by: Ulf Hansson <ulf.hansson@...aro.org>
Signed-off-by: Lee Jones <lee.jones@...aro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/mmc/card/block.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

--- a/drivers/mmc/card/block.c
+++ b/drivers/mmc/card/block.c
@@ -1772,8 +1772,7 @@ static void mmc_blk_packed_hdr_wrq_prep(
 		do_data_tag = (card->ext_csd.data_tag_unit_size) &&
 			(prq->cmd_flags & REQ_META) &&
 			(rq_data_dir(prq) == WRITE) &&
-			((brq->data.blocks * brq->data.blksz) >=
-			 card->ext_csd.data_tag_unit_size);
+			blk_rq_bytes(prq) >= card->ext_csd.data_tag_unit_size;
 		/* Argument of CMD23 */
 		packed_cmd_hdr[(i * 2)] = cpu_to_le32(
 			(do_rel_wr ? MMC_CMD23_ARG_REL_WR : 0) |