From 05aa52033494a13178fb550660aea87cd8a99cfd Mon Sep 17 00:00:00 2001 From: Johan Hovold Date: Mon, 12 Jan 2015 17:12:26 +0100 Subject: [PATCH] gpio: clean up gpiochip_add error handling Clean up gpiochip_add error handling. Signed-off-by: Johan Hovold Signed-off-by: Linus Walleij --- drivers/gpio/gpiolib.c | 38 +++++++++++++++++--------------------- 1 file changed, 17 insertions(+), 21 deletions(-) diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c index ac5944b..4efb92c 100644 --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -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; - - /* 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; - } + for (id = 0; id < chip->ngpio; id++) { + struct gpio_desc *desc = &descs[id]; + + 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__, -- 2.7.4