diff options
| author | Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2019-12-04 16:53:30 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2019-12-04 19:44:14 -0800 |
| commit | a97832f224893d6155aa785773df70263cfe94ef (patch) | |
| tree | 2d25dcb158ae36e5787b021abae793d634e63072 /drivers/gpio | |
| parent | 30544ed5de431fe25d3793e4dd5a058d877c4d77 (diff) | |
gpio: pca953x: remove redundant variable and check in IRQ handler
We always will have at least one iteration of the loop due to pending
being guaranteed to be non-zero. That is, we may remove extra variable
and check in the IRQ handler.
Link: http://lkml.kernel.org/r/20191022172922.61232-9-andriy.shevchenko@linux.intel.com
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Cc: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Cc: William Breathitt Gray <vilhelm.gray@gmail.com>
Cc: Yury Norov <yury.norov@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/gpio')
| -rw-r--r-- | drivers/gpio/gpio-pca953x.c | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/drivers/gpio/gpio-pca953x.c b/drivers/gpio/gpio-pca953x.c index 232e3f987511..9f3301130efb 100644 --- a/drivers/gpio/gpio-pca953x.c +++ b/drivers/gpio/gpio-pca953x.c @@ -743,7 +743,6 @@ static irqreturn_t pca953x_irq_handler(int irq, void *devid) struct pca953x_chip *chip = devid; u8 pending[MAX_BANK]; u8 level; - unsigned nhandled = 0; int i; if (!pca953x_irq_pending(chip, pending)) @@ -755,11 +754,10 @@ static irqreturn_t pca953x_irq_handler(int irq, void *devid) handle_nested_irq(irq_find_mapping(chip->gpio_chip.irq.domain, level + (BANK_SZ * i))); pending[i] &= ~(1 << level); - nhandled++; } } - return (nhandled > 0) ? IRQ_HANDLED : IRQ_NONE; + return IRQ_HANDLED; } static int pca953x_irq_setup(struct pca953x_chip *chip, |