diff options
| author | Hans Holmberg <hans.holmberg@intel.com> | 2015-01-09 09:40:43 +0100 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2015-01-15 18:31:47 +0100 |
| commit | 7b8792bbdffdff3abda704f89c6a45ea97afdc62 (patch) | |
| tree | d85da0c9c8d3f220fea09473eb7568e61c11ffd5 | |
| parent | ebbeba120ab2ec6ac5f3afc1425ec6ff0b77ad6f (diff) | |
gpiolib: of: Correct error handling in of_get_named_gpiod_flags
of_get_named_gpiod_flags fails with -EPROBE_DEFER in cases
where the gpio chip is available and the GPIO translation fails.
This causes drivers to be re-probed erroneusly, and hides the
real problem(i.e. the GPIO number being out of range).
Cc: Stable <stable@vger.kernel.org>
Signed-off-by: Hans Holmberg <hans.holmberg@intel.com>
Reviewed-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
| -rw-r--r-- | drivers/gpio/gpiolib-of.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/drivers/gpio/gpiolib-of.c b/drivers/gpio/gpiolib-of.c index 604dbe60bdee..08261f2b3a82 100644 --- a/drivers/gpio/gpiolib-of.c +++ b/drivers/gpio/gpiolib-of.c @@ -45,8 +45,14 @@ static int of_gpiochip_find_and_xlate(struct gpio_chip *gc, void *data) return false; ret = gc->of_xlate(gc, &gg_data->gpiospec, gg_data->flags); - if (ret < 0) - return false; + if (ret < 0) { + /* We've found the gpio chip, but the translation failed. + * Return true to stop looking and return the translation + * error via out_gpio + */ + gg_data->out_gpio = ERR_PTR(ret); + return true; + } gg_data->out_gpio = gpiochip_get_desc(gc, ret); return true; |