[U-Boot] [PATCH] mmc: Fix uninitialised priv member

[Sam Protsenko]

On 9 February 2018 at 17:24, Alex Kiernan <alex.kiernan at gmail.com> wrote:
> When using omap_hsmmc without the device model then the allocation
> of mmc->priv ends up uninitialised.
>
> Signed-off-by: Alex Kiernan <alex.kiernan at gmail.com>

Reviewed-by: Sam Protsenko <semen.protsenko at linaro.org>

A good one, thanks!

> ---
> I've a board (AM335xx based) which boots fine with 2018-01, with
> 2018-03-rc1 (actually 1811a92) it fails in the MLO:
>
>   U-Boot SPL 2018.03-rc1-00222-g128a503-dirty (Feb 09 2018 - 11:51:50 +0000)
>   Trying to boot from MMC2
>   omap_hsmmc_send_cmd : DMA timeout: No status update
>   mmc_init: -110, time 1026
>   spl: mmc init failed with error: -110
>   SPL: failed to boot from all boot devices
>   ### ERROR ### Please RESET the board ###
>
> Bisecting it out, it's this commit:
>
>   f0d53e8 mmc: omap_hsmmc: Add support for DMA (ADMA2)
>
>  drivers/mmc/omap_hsmmc.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/mmc/omap_hsmmc.c b/drivers/mmc/omap_hsmmc.c
> index b12d6d9..c6b3f25 100644
> --- a/drivers/mmc/omap_hsmmc.c
> +++ b/drivers/mmc/omap_hsmmc.c
> @@ -918,7 +918,7 @@ int omap_mmc_init(int dev_index, uint host_caps_mask, uint f_max, int cd_gpio,
>         struct mmc_config *cfg;
>         uint host_caps_val;
>
> -       priv = malloc(sizeof(*priv));
> +       priv = calloc(1, sizeof(*priv));
>         if (priv == NULL)
>                 return -1;
>
> --
> 2.7.4
>
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