[U-Boot] [PATCH] mmc: fix off-by-one bug in mmc_startup_v4()

[Jaehoon Chung]

On 02/20/2018 08:35 PM, Alexander Kochetkov wrote:
> SD-card with EXT_CSD_REV value 9 will trigger off-by-one
> bug while accessing mmc_versions array. The patch fix that.

I'm confusing about commit-msg. "SD-card with EXT_CSD_REV"?

Best Regards,
Jaehoon Chung

> 
> Signed-off-by: Alexander Kochetkov <al.kochet at gmail.com>
> ---
>  drivers/mmc/mmc.c |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c
> index 99e2a75..3aa153a 100644
> --- a/drivers/mmc/mmc.c
> +++ b/drivers/mmc/mmc.c
> @@ -1974,7 +1974,7 @@ static int mmc_startup_v4(struct mmc *mmc)
>  		return -ENOMEM;
>  	memcpy(mmc->ext_csd, ext_csd, MMC_MAX_BLOCK_LEN);
>  
> -	if (ext_csd[EXT_CSD_REV] > ARRAY_SIZE(mmc_versions))
> +	if (ext_csd[EXT_CSD_REV] >= ARRAY_SIZE(mmc_versions))
>  		return -EINVAL;
>  
>  	mmc->version = mmc_versions[ext_csd[EXT_CSD_REV]];
>