[PATCH v2] mmc: meson-gx: fix error path when driver initialization fails before enabling clocks

[Ulf Hansson]

On 14 March 2017 at 21:05, Michał Zegan <webczat at webczatnet.pl> wrote:
> This patch fixes the case where meson_mmc_probe function fails before
> core_clk is enabled.
> Originally, that would result in a try to disable the core clock, and if
> it was not already enabled, it would result in a kernel warning.
> This issue is similar to the one with div_clk.
> Fix it by introducing another error path used only between successfully
> enabling the core clock, and successfully enabling the div clock.
> That would ensure that core clock is disabled only if it was enabled before.
>
> Signed-off-by: Michał Zegan <webczat at webczatnet.pl>

Thanks, applied for next!

Kind regards
Uffe

> ---
> changes since v1:
> cherry picked on top of mmc next branch
>  drivers/mmc/host/meson-gx-mmc.c | 5 +++--
>  1 file changed, 3 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/mmc/host/meson-gx-mmc.c b/drivers/mmc/host/meson-gx-mmc.c
> index c574e1519623..bd075fef08d4 100644
> --- a/drivers/mmc/host/meson-gx-mmc.c
> +++ b/drivers/mmc/host/meson-gx-mmc.c
> @@ -743,7 +743,7 @@ static int meson_mmc_probe(struct platform_device *pdev)
>
>         ret = meson_mmc_clk_init(host);
>         if (ret)
> -               goto free_host;
> +               goto err_core_clk;
>
>         /* Stop execution */
>         writel(0, host->regs + SD_EMMC_START);
> @@ -783,8 +783,9 @@ static int meson_mmc_probe(struct platform_device *pdev)
>
>  err_div_clk:
>         clk_disable_unprepare(host->cfg_div_clk);
> -free_host:
> +err_core_clk:
>         clk_disable_unprepare(host->core_clk);
> +free_host:
>         mmc_free_host(mmc);
>         return ret;
>  }
> --
> 2.12.0
>