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

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Message-ID: <CANfBPZ_hgEks_dTBWomaj49xLiXaz-_x+rCAYjCgLQNa24WU=A@mail.gmail.com>
Date:	Mon, 14 May 2012 17:27:24 +0530
From:	"S, Venkatraman" <svenkatr@...com>
To:	yongd <yongd@...vell.com>
Cc:	cjb@...top.org, linux-mmc@...r.kernel.org,
	stefan.xk.nilsson@...ricsson.com, linus.walleij@...aro.org,
	ulf.hansson@...ricsson.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mmc:sdio:retry CMD52/53 when error happens

On Mon, May 14, 2012 at 2:09 PM, yongd <yongd@...vell.com> wrote:
>  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 */
> --

Looks right to me.
Reviewed-by: Venkatraman S <svenkatr@...com>
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