diff options
| author | Mihai Mihalache <mihai.d.mihalache@intel.com> | 2016-03-16 18:21:12 +0300 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2016-03-17 14:44:57 +0300 |
| commit | 8d48794bb3bf7d7e421204a8cc3bd5c95ffc609b (patch) | |
| tree | 1812e794803bddf1f70f9931193ae1560ff459b7 /drivers/regulator | |
| parent | 768e66686cfe83f786f6ae26f1799cca69e80523 (diff) | |
| download | linux-8d48794bb3bf7d7e421204a8cc3bd5c95ffc609b.tar.xz | |
regulator: gpio: check return value of of_get_named_gpio
At boot time the regulator driver can be initialized before the
gpio, in which case the call to of_get_named_gpio will return
EPROBE_DEFER. This value is silently passed to regulator_register
which will return success, although the gpio is not registered
(regulator_ena_gpio_request not called) as the value passed is
detected as invalid. The gpio_regulator_probe will therefore
succeed win no gpio requested.
Signed-off-by: Mihai Mihalache <mihai.d.mihalache@intel.com>
Reviewed-by: Hans Holmberg <hans.holmberg@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/regulator')
| -rw-r--r-- | drivers/regulator/gpio-regulator.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/regulator/gpio-regulator.c b/drivers/regulator/gpio-regulator.c index a8718e98674a..83e89e5d4752 100644 --- a/drivers/regulator/gpio-regulator.c +++ b/drivers/regulator/gpio-regulator.c @@ -162,6 +162,8 @@ of_get_gpio_regulator_config(struct device *dev, struct device_node *np, of_property_read_u32(np, "startup-delay-us", &config->startup_delay); config->enable_gpio = of_get_named_gpio(np, "enable-gpio", 0); + if (config->enable_gpio == -EPROBE_DEFER) + return ERR_PTR(-EPROBE_DEFER); /* Fetch GPIOs. - optional property*/ ret = of_gpio_count(np); |