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gpiolib: cosmetic improvements for error handling in gpiochip_add() 

Hopefully it makes the code look nicer and makes it easier to extend
this function.

Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
CC: devicetree-discuss@lists.ozlabs.org
CC: linux-kernel@vger.kernel.org
This commit is contained in:
Anton Vorontsov 2010-06-08 07:48:15 -06:00 committed by Grant Likely
parent ac80a51e2c
commit cedb1881ba
1 changed files with 12 additions and 6 deletions
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18
drivers/gpio/gpiolib.c
View File

@ -1101,14 +1101,20 @@ int gpiochip_add(struct gpio_chip *chip)
unlock:
spin_unlock_irqrestore(&gpio_lock, flags);
if (status == 0)
status = gpiochip_export(chip);
if (status)
goto fail;
status = gpiochip_export(chip);
if (status)
goto fail;
return 0;
fail:
/* failures here can mean systems won't boot... */
if (status)
pr_err("gpiochip_add: gpios %d..%d (%s) failed to register\n",
chip->base, chip->base + chip->ngpio - 1,
chip->label ? : "generic");
pr_err("gpiochip_add: gpios %d..%d (%s) failed to register\n",
chip->base, chip->base + chip->ngpio - 1,
chip->label ? : "generic");
return status;
}
EXPORT_SYMBOL_GPL(gpiochip_add);