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authorDan Carpenter <dan.carpenter@oracle.com>2015-10-08 10:12:01 +0300
committerLinus Walleij <linus.walleij@linaro.org>2015-10-15 16:43:51 +0200
commit21d4de1469a1da20a14a745c5f49488bba417ea7 (patch)
treed0c39132649b032b524328ea7d0abf88a4134795 /drivers/gpio
parent78856ac0dd33036ae08a18b644e9fa40b30ee011 (diff)
downloadlinux-21d4de1469a1da20a14a745c5f49488bba417ea7.tar.bz2
gpio: pl061: returning with lock held in pl061_irq_type()
We were returning with "chip->lock" held by mistake. It's safe to move the return to before we take the spinlock. Fixes: 1dbf7f299f90 ('gpio: pl061: detail IRQ trigger handling') Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/gpio')
-rw-r--r--drivers/gpio/gpio-pl061.c13
1 files changed, 7 insertions, 6 deletions
diff --git a/drivers/gpio/gpio-pl061.c b/drivers/gpio/gpio-pl061.c
index 5b1461f6aeed..179339739d60 100644
--- a/drivers/gpio/gpio-pl061.c
+++ b/drivers/gpio/gpio-pl061.c
@@ -152,12 +152,6 @@ static int pl061_irq_type(struct irq_data *d, unsigned trigger)
if (offset < 0 || offset >= PL061_GPIO_NR)
return -EINVAL;
- spin_lock_irqsave(&chip->lock, flags);
-
- gpioiev = readb(chip->base + GPIOIEV);
- gpiois = readb(chip->base + GPIOIS);
- gpioibe = readb(chip->base + GPIOIBE);
-
if ((trigger & (IRQ_TYPE_LEVEL_HIGH | IRQ_TYPE_LEVEL_LOW)) &&
(trigger & (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING)))
{
@@ -168,6 +162,13 @@ static int pl061_irq_type(struct irq_data *d, unsigned trigger)
return -EINVAL;
}
+
+ spin_lock_irqsave(&chip->lock, flags);
+
+ gpioiev = readb(chip->base + GPIOIEV);
+ gpiois = readb(chip->base + GPIOIS);
+ gpioibe = readb(chip->base + GPIOIBE);
+
if (trigger & (IRQ_TYPE_LEVEL_HIGH | IRQ_TYPE_LEVEL_LOW)) {
bool polarity = trigger & IRQ_TYPE_LEVEL_HIGH;