linux-kernel - [PATCH] mmc:sdio:retry CMD52/53 when error happens

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Message-Id: <1336984792-13956-1-git-send-email-yongd@marvell.com>
Date:	Mon, 14 May 2012 16:39:52 +0800
From:	yongd <yongd@...vell.com>
To:	cjb@...top.org, linux-mmc@...r.kernel.org
Cc:	stefan.xk.nilsson@...ricsson.com, linus.walleij@...aro.org,
	ulf.hansson@...ricsson.com, svenkatr@...com,
	linux-kernel@...r.kernel.org, yongd <yongd@...vell.com>
Subject: [PATCH] mmc:sdio:retry CMD52/53 when error happens

  Set sdio CMD52/53's retry time as MMC_CMD_RETRIES. As a result,
sdio might benefit from core-internal CMD retry mechanism when
some errors happen(CRC, etc).

Signed-off-by: yongd <yongd@...vell.com>
---
 drivers/mmc/core/sdio_ops.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/mmc/core/sdio_ops.c b/drivers/mmc/core/sdio_ops.c
index d29e206..884c27e 100644
--- a/drivers/mmc/core/sdio_ops.c
+++ b/drivers/mmc/core/sdio_ops.c
@@ -86,7 +86,7 @@ static int mmc_io_rw_direct_host(struct mmc_host *host, int write, unsigned fn,
 	cmd.arg |= in;
 	cmd.flags = MMC_RSP_SPI_R5 | MMC_RSP_R5 | MMC_CMD_AC;
 
-	err = mmc_wait_for_cmd(host, &cmd, 0);
+	err = mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES);
 	if (err)
 		return err;
 
@@ -147,6 +147,7 @@ int mmc_io_rw_extended(struct mmc_card *card, int write, unsigned fn,
 	else
 		cmd.arg |= 0x08000000 | blocks;		/* block mode */
 	cmd.flags = MMC_RSP_SPI_R5 | MMC_RSP_R5 | MMC_CMD_ADTC;
+	cmd.retries = MMC_CMD_RETRIES;
 
 	data.blksz = blksz;
 	/* Code in host drivers/fwk assumes that "blocks" always is >=1 */
-- 
1.7.9.5

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