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SubjectRe: [PATCH v2 06/14] mmc: dw_mmc: simplify optional reset handling
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Hi Philipp,

Todays next branch does not work with exynos5433-tm2 board.
I guess this patch causes regression. On MMC without reset controller I
get errors:
[ 4.938222] dwmmc_exynos 15540000.mshc: platform data not available
[ 4.943268] dwmmc_exynos: probe of 15540000.mshc failed with error -22
[ 4.950184] dwmmc_exynos 15560000.mshc: platform data not available
[ 4.955962] dwmmc_exynos: probe of 15560000.mshc failed with error -22

Commenting out reset controller get and error checks 'fixes' the issue.

On 15.03.2017 12:31, Philipp Zabel wrote:
> As of commit bb475230b8e5 ("reset: make optional functions really
> optional"), the reset framework API calls use NULL pointers to describe
> optional, non-present reset controls.
>
> This allows to return errors from devm_reset_control_get_optional and to
> call reset_control_(de)assert unconditionally.
>
> Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
> ---
> drivers/mmc/host/dw_mmc.c | 14 +++++---------
> 1 file changed, 5 insertions(+), 9 deletions(-)
>
> diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c
> index a9ac0b4573131..3d62b0a1f81cb 100644
> --- a/drivers/mmc/host/dw_mmc.c
> +++ b/drivers/mmc/host/dw_mmc.c
> @@ -2968,10 +2968,8 @@ static struct dw_mci_board *dw_mci_parse_dt(struct dw_mci *host)
>
> /* find reset controller when exist */
> pdata->rstc = devm_reset_control_get_optional(dev, "reset");
> - if (IS_ERR(pdata->rstc)) {
> - if (PTR_ERR(pdata->rstc) == -EPROBE_DEFER)
> - return ERR_PTR(-EPROBE_DEFER);
> - }
> + if (IS_ERR(pdata->rstc))
> + return ERR_CAST(pdata->rstc);


With three lines above commented out it works.

Regards
Andrzej



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