[PATCH] gpio: gpiolib: set gpiochip_remove retval to void

From: abdoulaye berthe
Date: Fri May 23 2014 - 13:12:45 EST


This avoids handling gpiochip remove error in device
remove handler.

Signed-off-by: abdoulaye berthe <berthe.ab@xxxxxxxxx>
---
drivers/gpio/gpiolib.c | 24 +++++++-----------------
include/linux/gpio/driver.h | 2 +-
2 files changed, 8 insertions(+), 18 deletions(-)

diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index f48817d..4878980 100644
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -1263,10 +1263,9 @@ static void gpiochip_irqchip_remove(struct gpio_chip *gpiochip);
*
* A gpio_chip with any GPIOs still requested may not be removed.
*/
-int gpiochip_remove(struct gpio_chip *chip)
+void gpiochip_remove(struct gpio_chip *chip)
{
unsigned long flags;
- int status = 0;
unsigned id;

acpi_gpiochip_remove(chip);
@@ -1278,24 +1277,15 @@ int gpiochip_remove(struct gpio_chip *chip)
of_gpiochip_remove(chip);

for (id = 0; id < chip->ngpio; id++) {
- if (test_bit(FLAG_REQUESTED, &chip->desc[id].flags)) {
- status = -EBUSY;
- break;
- }
- }
- if (status == 0) {
- for (id = 0; id < chip->ngpio; id++)
- chip->desc[id].chip = NULL;
-
- list_del(&chip->list);
+ if (test_bit(FLAG_REQUESTED, &chip->desc[id].flags))
+ panic("gpiolib.c: gpiochip is still requested\n");
}
+ for (id = 0; id < chip->ngpio; id++)
+ chip->desc[id].chip = NULL;

+ list_del(&chip->list);
spin_unlock_irqrestore(&gpio_lock, flags);
-
- if (status == 0)
- gpiochip_unexport(chip);
-
- return status;
+ gpiochip_unexport(chip);
}
EXPORT_SYMBOL_GPL(gpiochip_remove);

diff --git a/include/linux/gpio/driver.h b/include/linux/gpio/driver.h
index 1827b43..72ed256 100644
--- a/include/linux/gpio/driver.h
+++ b/include/linux/gpio/driver.h
@@ -138,7 +138,7 @@ extern const char *gpiochip_is_requested(struct gpio_chip *chip,

/* add/remove chips */
extern int gpiochip_add(struct gpio_chip *chip);
-extern int __must_check gpiochip_remove(struct gpio_chip *chip);
+void gpiochip_remove(struct gpio_chip *chip);
extern struct gpio_chip *gpiochip_find(void *data,
int (*match)(struct gpio_chip *chip, void *data));

--
1.8.3.2

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