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gpio: fix warning about iterator 

We were getting build warning about "iterator" being used uninitialized.
Use iterator properly to fix the build warning and in the process remove
the variable "pos" which is not required now.

Signed-off-by: Sudip Mukherjee <sudip@vectorindia.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
hifive-unleashed-5.1
Sudip Mukherjee 2015-12-27 19:06:50 +05:30 committed by Linus Walleij
parent 60befd2ea1
commit e28ecca6ea
1 changed files with 12 additions and 8 deletions
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20
drivers/gpio/gpiolib.c
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@ -189,23 +189,21 @@ EXPORT_SYMBOL_GPL(gpiod_get_direction);
*/
static int gpiochip_add_to_list(struct gpio_chip *chip)
{
struct list_head *pos;
struct gpio_chip *iterator;
struct gpio_chip *previous = NULL;
if (list_empty(&gpio_chips)) {
pos = gpio_chips.next;
goto found;
list_add_tail(&chip->list, &gpio_chips);
return 0;
}
list_for_each(pos, &gpio_chips) {
iterator = list_entry(pos, struct gpio_chip, list);
list_for_each_entry(iterator, &gpio_chips, list) {
if (iterator->base >= chip->base + chip->ngpio) {
/*
* Iterator is the first GPIO chip so there is no
* previous one
*/
if (previous == NULL) {
if (!previous) {
goto found;
} else {
/*
@ -221,7 +219,13 @@ static int gpiochip_add_to_list(struct gpio_chip *chip)
previous = iterator;
}
/* We are beyond the last chip in the list */
/*
* We are beyond the last chip in the list and iterator now
* points to the head.
* Let iterator point to the last chip in the list.
*/
iterator = list_last_entry(&gpio_chips, struct gpio_chip, list);
if (iterator->base + iterator->ngpio <= chip->base)
goto found;
@ -230,7 +234,7 @@ static int gpiochip_add_to_list(struct gpio_chip *chip)
return -EBUSY;
found:
list_add_tail(&chip->list, pos);
list_add_tail(&chip->list, &iterator->list);
return 0;
}