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gpio: tegra: fix unbalanced chained_irq_enter/exit 

When more than one GPIO IRQs are triggered simultaneously,
tegra_gpio_irq_handler() called chained_irq_exit() multiple
times for one chained_irq_enter().

Fixes: 3c92db9ac0
Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
[Also changed the variable to a bool]
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Michał Mirosław 2017-07-18 14:35:45 +02:00 committed by Linus Walleij
parent df1e76f28f
commit 9e9509e38f
1 changed files with 3 additions and 3 deletions
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6
drivers/gpio/gpio-tegra.c
View File

@ -360,7 +360,7 @@ static void tegra_gpio_irq_handler(struct irq_desc *desc)
{
int port;
int pin;
int unmasked = 0;
bool unmasked = false;
int gpio;
u32 lvl;
unsigned long sta;
@ -384,8 +384,8 @@ static void tegra_gpio_irq_handler(struct irq_desc *desc)
* before executing the handler so that we don't
* miss edges
*/
if (lvl & (0x100 << pin)) {
unmasked = 1;
if (!unmasked && lvl & (0x100 << pin)) {
unmasked = true;
chained_irq_exit(chip, desc);
}