diff options
| author |   Geert Uytterhoeven <geert+renesas@glider.be> | 2016-02-19 11:00:50 +0100 |
|---|---|---|
| committer |   Linus Walleij <linus.walleij@linaro.org> | 2016-02-25 10:04:25 +0100 |
| commit | 40c8eabac43db862810367edb2fe9ec7f69e814e (patch) | |
| tree | 60c535a4724dd17d41aea2d330dc26d6e79715c2 /drivers/gpio/devres.c | |
| parent | tools: gpio: Small updates for output format (diff) | |
| download | linux-dev-40c8eabac43db862810367edb2fe9ec7f69e814e.tar.xz linux-dev-40c8eabac43db862810367edb2fe9ec7f69e814e.zip | |
gpio: Propagate all errors in devm_get_gpiod_from_child()
devm_get_gpiod_from_child() tries several property suffixes to find a
GPIO descriptor. If all suffixes fail and no probe deferral has been
detected, it returns the error of the last try.
However, if any but the last try fails with a real error (e.g. -EBUSY),
this error is not propagated, and -ENOENT will be returned.
This confuses drivers that e.g. want to detect if a GPIO is already in
use.
To fix this, change the loop logic to continue on -ENOENT, which
indicates the property was not found and the next suffix should be
tried, and propagate all other detected errors.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/gpio/devres.c')
| -rw-r--r-- | drivers/gpio/devres.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/gpio/devres.c b/drivers/gpio/devres.c index 903fcf4d04a0..b760cbbb41d8 100644 --- a/drivers/gpio/devres.c +++ b/drivers/gpio/devres.c @@ -155,7 +155,7 @@ struct gpio_desc *devm_get_gpiod_from_child(struct device *dev, suffixes[i]); desc = fwnode_get_named_gpiod(child, prop_name); - if (!IS_ERR(desc) || (PTR_ERR(desc) == -EPROBE_DEFER)) + if (!IS_ERR(desc) || (PTR_ERR(desc) != -ENOENT)) break; } if (IS_ERR(desc)) { |