commit: d46329a708c1a3301e272a029266b69339c0877f From: Gabor Juhos <[email protected]> Date: Sun, 23 Dec 2012 01:54:58 -0800 Subject: Input: gpio_keys_polled - defer probing if GPIO probing is deferred
If GPIO probing is deferred, the driver tries to claim an invalid GPIO line which leads to an error message like this: gpio-keys-polled buttons.2: unable to claim gpio 4294966779, err=-22 gpio-keys-polled: probe of buttons.2 failed with error -22 We should make sure that error code returned by of_get_gpio_flags (including -EPROBE_DEFER) is propagated up the stack. Cc: [email protected] Signed-off-by: Gabor Juhos <[email protected]> Signed-off-by: Dmitry Torokhov <[email protected]> --- drivers/input/keyboard/gpio_keys_polled.c | 13 ++++++++++++- 1 files changed, 12 insertions(+), 1 deletions(-) diff --git a/drivers/input/keyboard/gpio_keys_polled.c b/drivers/input/keyboard/gpio_keys_polled.c index f686fd9..2114716 100644 --- a/drivers/input/keyboard/gpio_keys_polled.c +++ b/drivers/input/keyboard/gpio_keys_polled.c @@ -135,6 +135,7 @@ static struct gpio_keys_platform_data *gpio_keys_polled_get_devtree_pdata(struct i = 0; for_each_child_of_node(node, pp) { + int gpio; enum of_gpio_flags flags; if (!of_find_property(pp, "gpios", NULL)) { @@ -143,9 +144,19 @@ static struct gpio_keys_platform_data *gpio_keys_polled_get_devtree_pdata(struct continue; } + gpio = of_get_gpio_flags(pp, 0, &flags); + if (gpio < 0) { + error = gpio; + if (error != -EPROBE_DEFER) + dev_err(dev, + "Failed to get gpio flags, error: %d\n", + error); + goto err_free_pdata; + } + button = &pdata->buttons[i++]; - button->gpio = of_get_gpio_flags(pp, 0, &flags); + button->gpio = gpio; button->active_low = flags & OF_GPIO_ACTIVE_LOW; if (of_property_read_u32(pp, "linux,code", &button->code)) { -- 1.7.3.4 -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
