RE: [PATCH] mmc: fixed wrong SD card detection

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I don't see this.
Maybe that is your hardware issue.

Thanks and Best Regards
Jerry Huang


> -----Original Message-----
> From: linux-mmc-owner@xxxxxxxxxxxxxxx [mailto:linux-mmc-
> owner@xxxxxxxxxxxxxxx] On Behalf Of Jaehoon Chung
> Sent: Friday, May 06, 2011 5:39 PM
> To: linux-mmc@xxxxxxxxxxxxxxx
> Cc: Chris Ball; Kyungmin Park
> Subject: [PATCH] mmc: fixed wrong SD card detection
> 
> This patch added mmc_power_off after mmc_attach_sd()
> 
> i found that didn't detect the second card insert.(using SDHCI) you can
> see the below log.
> 
> i want to know that somebody know this issue...
> 
> ->first card inserted (correct card detect)
> # mmc1: new SDHC card at address e624
> mmcblk1: mmc1:e624 SU04G 3.69 GiB
>  mmcblk1: p1
> #
> # mmc1: card e624 removed
> -> second card inserted
> mmc1: error -110 whilst initialising SD card
> mmc1: Card removed during transfer!
> mmc1: Resetting controller.
> -> third card inserted
> mmc1: new SDHC card at address e624
> mmcblk1: mmc1:e624 SU04G 3.69 GiB
>  mmcblk1: p1
> 
> I added mmc_power_off() after only mmc_attach_sd().
> 
> Signed-off-by: Jaehoon Chung <jh80.chung@xxxxxxxxxxx>
> Signed-off-by: kyungmin Park <kyungmin.park@xxxxxxxxxxx>
> ---
>  drivers/mmc/core/core.c |    4 +++-
>  1 files changed, 3 insertions(+), 1 deletions(-)
> 
> diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c index
> 1dbc185..d5d8ac0 100644
> --- a/drivers/mmc/core/core.c
> +++ b/drivers/mmc/core/core.c
> @@ -1522,8 +1522,10 @@ static int mmc_rescan_try_freq(struct mmc_host
> *host, unsigned freq)
>  	/* Order's important: probe SDIO, then SD, then MMC */
>  	if (!mmc_attach_sdio(host))
>  		return 0;
> -	if (!mmc_attach_sd(host))
> +	if (!mmc_attach_sd(host)) {
> +		mmc_power_off(host);
>  		return 0;
> +	}
>  	if (!mmc_attach_mmc(host))
>  		return 0;
> 
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