[PATCH] gpio: omap: Fix gpiochip_add() handling for deferred probe

[Linus Walleij]

On Fri, Aug 28, 2015 at 8:44 PM, Tony Lindgren <tony at atomide.com> wrote:

> Currently we gpio-omap breaks if gpiochip_add() returns -EPROBE_DEFER:
>
> [    0.570000] gpiochip_add: GPIOs 0..31 (gpio) failed to register
> [    0.570000] omap_gpio 48310000.gpio: Could not register gpio chip -517
> ...
> [    3.670000] omap_gpio 48310000.gpio: Unbalanced pm_runtime_enable!
>
> Let's fix the issue by adding the missing pm_runtime_put() on error.
>
> Cc: Grygorii Strashko <grygorii.strashko at ti.com>
> Cc: Javier Martinez Canillas <javier at dowhile0.org>
> Cc: Kevin Hilman <khilman at deeprootsystems.com>
> Cc: Santosh Shilimkar <ssantosh at kernel.org>
> Signed-off-by: Tony Lindgren <tony at atomide.com>
> ---
>  drivers/gpio/gpio-omap.c | 5 ++++-
>  1 file changed, 4 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpio/gpio-omap.c b/drivers/gpio/gpio-omap.c
> index b0c57d5..f09bf0b 100644
> --- a/drivers/gpio/gpio-omap.c
> +++ b/drivers/gpio/gpio-omap.c
> @@ -1232,8 +1232,11 @@ static int omap_gpio_probe(struct platform_device *pdev)
>         omap_gpio_mod_init(bank);
>
>         ret = omap_gpio_chip_init(bank, irqc);
> -       if (ret)
> +       if (ret) {
> +               pm_runtime_put_sync(bank->dev);
> +               pm_runtime_disable(bank->dev);
>                 return ret;
> +       }
>
>         omap_gpio_show_rev(bank);

Patch applied for fixes with Santosh's ACK.

Yours,
Linus Walleij