Using the GPIO chips list is much faster than parsing the entire GPIO
number space.
Signed-off-by: Alexandre Courbot <acourbot@xxxxxxxxxx>
---
drivers/gpio/gpiolib.c | 17 +++++++----------
1 file changed, 7 insertions(+), 10 deletions(-)
diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index 4ceb4a7..92f9ee4 100644
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -1194,20 +1194,17 @@ struct gpio_chip *gpiochip_find(void *data,
int (*match)(struct gpio_chip *chip,
void *data))
{
- struct gpio_chip *chip = NULL;
+ struct gpio_chip *chip;
unsigned long flags;
- int i;
spin_lock_irqsave(&gpio_lock, flags);
- for (i = 0; i < ARCH_NR_GPIOS; i++) {
- if (!gpio_desc[i].chip)
- continue;
-
- if (match(gpio_desc[i].chip, data)) {
- chip = gpio_desc[i].chip;
+ list_for_each_entry(chip, &gpio_chips, list)
+ if (match(chip, data))
break;
- }
- }
+
+ /* No match? */
+ if (&chip->list == &gpio_chips)
+ chip = NULL;
spin_unlock_irqrestore(&gpio_lock, flags);
return chip;
--
1.8.1.1
--
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