> -----Original Message-----
> From: [email protected] [mailto:linux-mmc-
> [email protected]] On Behalf Of [email protected]
> Sent: Friday, February 17, 2012 3:45 PM
> To: [email protected]; [email protected]
> Cc: [email protected]; [email protected]; Hyeonsu Kim
> Subject: [PATCH] mmc: core: fix au_size according to sd spec3.0
> 
> From: Hyeonsu Kim <[email protected]>
> 
> This "if phrase" is illogical.
> and SD Spec 3.0 supports au_size from 0 to 0xF.
> 
> Signed-off-by: Hyeonsu Kim <[email protected]>
> ---
>  drivers/mmc/core/sd.c |    2 +-
>  1 files changed, 1 insertions(+), 1 deletions(-)
> 
> diff --git a/drivers/mmc/core/sd.c b/drivers/mmc/core/sd.c index
> c63ad03..cf8bf0e 100644
> --- a/drivers/mmc/core/sd.c
> +++ b/drivers/mmc/core/sd.c
> @@ -244,7 +244,7 @@ static int mmc_read_ssr(struct mmc_card *card)
>        * bitfield positions accordingly.
>        */
>       au = UNSTUFF_BITS(ssr, 428 - 384, 4);
> -     if (au > 0 || au <= 9) {
> +     if (au >= 0 && au < 16) {

au = 0 is still invalid. And as "Jaehoon Chung" mentioned, we would need to
check the SD spec version here as au value from 10 to 15 is invalide for
cards till SD2.0 spec.

>               card->ssr.au = 1 << (au + 4);
>               es = UNSTUFF_BITS(ssr, 408 - 384, 16);
>               et = UNSTUFF_BITS(ssr, 402 - 384, 6);
> --
> 1.7.5.4
> 
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