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gpio: clean up gpiochip_add error handling

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Clean up gpiochip_add error handling.

Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Johan Hovold 2015-01-12 17:12:26 +01:00 committed by Linus Walleij
parent 225fce83cb
commit 05aa520334
1 changed files with 16 additions and 20 deletions
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36
drivers/gpio/gpiolib.c
View file

@ -255,32 +255,29 @@ int gpiochip_add(struct gpio_chip *chip)
}
status = gpiochip_add_to_list(chip);
if (status) {
spin_unlock_irqrestore(&gpio_lock, flags);
goto err_free_descs;
}
if (status == 0) {
for (id = 0; id < chip->ngpio; id++) {
struct gpio_desc *desc = &descs[id];
desc->chip = chip;
for (id = 0; id < chip->ngpio; id++) {
struct gpio_desc *desc = &descs[id];
/* REVISIT: most hardware initializes GPIOs as
* inputs (often with pullups enabled) so power
* usage is minimized. Linux code should set the
* gpio direction first thing; but until it does,
* and in case chip->get_direction is not set,
* we may expose the wrong direction in sysfs.
*/
desc->flags = !chip->direction_input
? (1 << FLAG_IS_OUT)
: 0;
}
desc->chip = chip;
/* REVISIT: most hardware initializes GPIOs as inputs (often
* with pullups enabled) so power usage is minimized. Linux
* code should set the gpio direction first thing; but until
* it does, and in case chip->get_direction is not set, we may
* expose the wrong direction in sysfs.
*/
desc->flags = !chip->direction_input ? (1 << FLAG_IS_OUT) : 0;
}
chip->desc = descs;
spin_unlock_irqrestore(&gpio_lock, flags);
if (status)
goto fail;
#ifdef CONFIG_PINCTRL
INIT_LIST_HEAD(&chip->pin_ranges);
#endif
@ -304,10 +301,9 @@ err_remove_chip:
spin_lock_irqsave(&gpio_lock, flags);
list_del(&chip->list);
spin_unlock_irqrestore(&gpio_lock, flags);
fail:
chip->desc = NULL;
err_free_descs:
kfree(descs);
chip->desc = NULL;
/* failures here can mean systems won't boot... */
pr_err("%s: GPIOs %d..%d (%s) failed to register\n", __func__,