diff options
| author | Roland Stigge <stigge@antcom.de> | 2012-10-28 16:34:59 +0100 |
|---|---|---|
| committer | Bryan Wu <cooloney@gmail.com> | 2012-11-26 23:28:49 +0100 |
| commit | 04553e925baaa815025c6fd3cdc301a794fa2c74 (patch) | |
| tree | 39d49a08fca20eccdb2dc308a15e81f41096fc7d /drivers/leds/leds-gpio.c | |
| parent | leds: ledtrig-gpio: replace strict_strtoul() with kstrtoul() (diff) | |
| download | linux-04553e925baaa815025c6fd3cdc301a794fa2c74.tar.xz linux-04553e925baaa815025c6fd3cdc301a794fa2c74.zip | |
leds: leds-gpio: Defer probing in case of deferred gpio probing
This patch makes leds-gpio's probe() return -EPROBE_DEFER if any of the gpios
to register are deferred themselves. This makes a change of
gpio_leds_create_of()'s return value necessary: Instead of returning NULL on
error, we now use ERR_PTR() error coding.
Signed-off-by: Roland Stigge <stigge@antcom.de>
Signed-off-by: Bryan Wu <cooloney@gmail.com>
Diffstat (limited to 'drivers/leds/leds-gpio.c')
| -rw-r--r-- | drivers/leds/leds-gpio.c | 17 |
1 files changed, 11 insertions, 6 deletions
diff --git a/drivers/leds/leds-gpio.c b/drivers/leds/leds-gpio.c index 0b4185315261..6a2109638fbe 100644 --- a/drivers/leds/leds-gpio.c +++ b/drivers/leds/leds-gpio.c @@ -21,6 +21,7 @@ #include <linux/workqueue.h> #include <linux/module.h> #include <linux/pinctrl/consumer.h> +#include <linux/err.h> struct gpio_led_data { struct led_classdev cdev; @@ -174,12 +175,16 @@ static struct gpio_leds_priv * __devinit gpio_leds_create_of(struct platform_dev /* count LEDs in this device, so we know how much to allocate */ count = of_get_child_count(np); if (!count) - return NULL; + return ERR_PTR(-ENODEV); + + for_each_child_of_node(np, child) + if (of_get_gpio(child, 0) == -EPROBE_DEFER) + return ERR_PTR(-EPROBE_DEFER); priv = devm_kzalloc(&pdev->dev, sizeof_gpio_leds_priv(count), GFP_KERNEL); if (!priv) - return NULL; + return ERR_PTR(-ENOMEM); for_each_child_of_node(np, child) { struct gpio_led led = {}; @@ -214,7 +219,7 @@ static struct gpio_leds_priv * __devinit gpio_leds_create_of(struct platform_dev err: for (count = priv->num_leds - 2; count >= 0; count--) delete_gpio_led(&priv->leds[count]); - return NULL; + return ERR_PTR(-ENODEV); } static const struct of_device_id of_gpio_leds_match[] = { @@ -224,7 +229,7 @@ static const struct of_device_id of_gpio_leds_match[] = { #else /* CONFIG_OF_GPIO */ static struct gpio_leds_priv * __devinit gpio_leds_create_of(struct platform_device *pdev) { - return NULL; + return ERR_PTR(-ENODEV); } #endif /* CONFIG_OF_GPIO */ @@ -262,8 +267,8 @@ static int __devinit gpio_led_probe(struct platform_device *pdev) } } else { priv = gpio_leds_create_of(pdev); - if (!priv) - return -ENODEV; + if (IS_ERR(priv)) + return PTR_ERR(priv); } platform_set_drvdata(pdev, priv); |