[U-Boot] [PATCH v2 2/4] exynos: Fix passing of errors in exynos_mmc_init()

[Przemyslaw Marczak <p.marczak@samsung.com>]

Hello Tobias,

On 09/25/2015 07:18 PM, Tobias Jakobi wrote:
> exynos_mmc_init() always returns zero, so for the caller
> it looks like it never fails.
>
> Correct this by returning the error code of process_nodes().
> For process_nodes() do something similar and return early
> when do_sdhci_init() fails.
>
> v2: Only fail in process_nodes() if we fail on all
>      available nodes.
>
> Signed-off-by: Tobias Jakobi <tjakobi@math.uni-bielefeld.de>
> ---
>   drivers/mmc/s5p_sdhci.c | 18 ++++++++++++------
>   1 file changed, 12 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/mmc/s5p_sdhci.c b/drivers/mmc/s5p_sdhci.c
> index e9c43a9..b461fde 100644
> --- a/drivers/mmc/s5p_sdhci.c
> +++ b/drivers/mmc/s5p_sdhci.c
> @@ -172,6 +172,7 @@ static int process_nodes(const void *blob, int node_list[], int count)
>   {
>   	struct sdhci_host *host;
>   	int i, node;
> +	int failed = 0;
>
>   	debug("%s: count = %d\n", __func__, count);
>
> @@ -185,11 +186,18 @@ static int process_nodes(const void *blob, int node_list[], int count)
>
>   		if (sdhci_get_config(blob, node, host)) {
>   			printf("%s: failed to decode dev %d\n",	__func__, i);
> -			return -1;
> +			failed++;
> +			continue;
> +		}
> +
> +		if (do_sdhci_init(host)) {
> +			printf("%s: failed to initialize dev %d\n", __func__, i);
> +			failed++;
>   		}
> -		do_sdhci_init(host);
>   	}
> -	return 0;
> +
> +	/* we only consider it an error when all nodes fail */
> +	return (failed == count ? -1 : 0);
>   }
>
>   int exynos_mmc_init(const void *blob)
> @@ -201,8 +209,6 @@ int exynos_mmc_init(const void *blob)
>   			COMPAT_SAMSUNG_EXYNOS_MMC, node_list,
>   			SDHCI_MAX_HOSTS);
>
> -	process_nodes(blob, node_list, count);
> -
> -	return 0;
> +	return process_nodes(blob, node_list, count);
>   }
>   #endif
>

Acked-by: Przemyslaw Marczak <p.marczak@samsung.com>

Best regards,
-- 
Przemyslaw Marczak
Samsung R&D Institute Poland
Samsung Electronics
p.marczak at samsung.com