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path: root/drivers/gpio/gpio-pcf857x.c
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Diffstat (limited to 'drivers/gpio/gpio-pcf857x.c')
-rw-r--r--drivers/gpio/gpio-pcf857x.c14
1 files changed, 5 insertions, 9 deletions
diff --git a/drivers/gpio/gpio-pcf857x.c b/drivers/gpio/gpio-pcf857x.c
index 404f3c61e..1d4d9bc8b 100644
--- a/drivers/gpio/gpio-pcf857x.c
+++ b/drivers/gpio/gpio-pcf857x.c
@@ -88,7 +88,6 @@ struct pcf857x {
struct gpio_chip chip;
struct i2c_client *client;
struct mutex lock; /* protect 'out' */
- spinlock_t slock; /* protect irq demux */
unsigned out; /* software latch */
unsigned status; /* current status */
unsigned int irq_parent;
@@ -185,23 +184,21 @@ static void pcf857x_set(struct gpio_chip *chip, unsigned offset, int value)
static irqreturn_t pcf857x_irq(int irq, void *data)
{
struct pcf857x *gpio = data;
- unsigned long change, i, status, flags;
+ unsigned long change, i, status;
status = gpio->read(gpio->client);
- spin_lock_irqsave(&gpio->slock, flags);
-
/*
* call the interrupt handler iff gpio is used as
* interrupt source, just to avoid bad irqs
*/
-
+ mutex_lock(&gpio->lock);
change = (gpio->status ^ status) & gpio->irq_enabled;
- for_each_set_bit(i, &change, gpio->chip.ngpio)
- handle_nested_irq(irq_find_mapping(gpio->chip.irqdomain, i));
gpio->status = status;
+ mutex_unlock(&gpio->lock);
- spin_unlock_irqrestore(&gpio->slock, flags);
+ for_each_set_bit(i, &change, gpio->chip.ngpio)
+ handle_nested_irq(irq_find_mapping(gpio->chip.irqdomain, i));
return IRQ_HANDLED;
}
@@ -293,7 +290,6 @@ static int pcf857x_probe(struct i2c_client *client,
return -ENOMEM;
mutex_init(&gpio->lock);
- spin_lock_init(&gpio->slock);
gpio->chip.base = pdata ? pdata->gpio_base : -1;
gpio->chip.can_sleep = true;