linux-kernel - [PATCH] mmc: block: disable the reliable write If the card does not support CMD23

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Message-Id: <1439537446-7713-1-git-send-email-sdliyong@gmail.com>
Date:	Fri, 14 Aug 2015 15:30:46 +0800
From:	sdliyong@...il.com
To:	chris@...ntf.net, ulf.hansson@...aro.org, sdliyong@...il.com,
	linux-mmc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] mmc: block: disable the reliable write If the card does not support CMD23

From: Yong Li <sdliyong@...il.com>

Signed-off-by: Yong Li <sdliyong@...il.com>
---
 drivers/mmc/card/block.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c
index 452782b..d9e3c45 100644
--- a/drivers/mmc/card/block.c
+++ b/drivers/mmc/card/block.c
@@ -1366,7 +1366,8 @@ static void mmc_blk_rw_rq_prep(struct mmc_queue_req *mqrq,
 	bool do_rel_wr = ((req->cmd_flags & REQ_FUA) ||
 			  (req->cmd_flags & REQ_META)) &&
 		(rq_data_dir(req) == WRITE) &&
-		(md->flags & MMC_BLK_REL_WR);
+		(md->flags & MMC_BLK_REL_WR) &&
+		!(card->quirks & MMC_QUIRK_BLK_NO_CMD23);
 
 	memset(brq, 0, sizeof(struct mmc_blk_request));
 	brq->mrq.cmd = &brq->cmd;
-- 
2.1.0

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