diff options
Diffstat (limited to 'drivers/gpio/gpio-pcf857x.c')
| -rw-r--r-- | drivers/gpio/gpio-pcf857x.c | 14 |
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; |