diff options
| author | Baruch Siach <baruch@tkos.co.il> | 2009-06-30 11:41:39 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-06-30 18:56:01 -0700 |
| commit | 50efacf6711e6c75595afd9b92aa15c1e4f7c79d (patch) | |
| tree | 6b23a034d4a798572f8ef62d18a2531df7a6239d /drivers/gpio | |
| parent | 79d7f4ee23d41571d9e4663521b5e6604c55729a (diff) | |
| download | lwn-50efacf6711e6c75595afd9b92aa15c1e4f7c79d.tar.gz lwn-50efacf6711e6c75595afd9b92aa15c1e4f7c79d.zip | |
gpio: pl061: fix IRQ handling for GPIOs >= PL061_GPIO_NR
IRQ handling is wrong for any GPIO >= PL061_GPIO_NR.
Fix this by implementing and using a proper .to_irq method.
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Cc: David Brownell <david-b@pacbell.net>
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/pl061.c | 17 |
1 files changed, 14 insertions, 3 deletions
diff --git a/drivers/gpio/pl061.c b/drivers/gpio/pl061.c index 80e483986699..4ee4c8367a3f 100644 --- a/drivers/gpio/pl061.c +++ b/drivers/gpio/pl061.c @@ -109,6 +109,16 @@ static void pl061_set_value(struct gpio_chip *gc, unsigned offset, int value) writeb(!!value << offset, chip->base + (1 << (offset + 2))); } +static int pl061_to_irq(struct gpio_chip *gc, unsigned offset) +{ + struct pl061_gpio *chip = container_of(gc, struct pl061_gpio, gc); + + if (chip->irq_base == (unsigned) -1) + return -EINVAL; + + return chip->irq_base + offset; +} + /* * PL061 GPIO IRQ */ @@ -200,7 +210,7 @@ static void pl061_irq_handler(unsigned irq, struct irq_desc *desc) desc->chip->ack(irq); list_for_each(ptr, chip_list) { unsigned long pending; - int gpio; + int offset; chip = list_entry(ptr, struct pl061_gpio, list); pending = readb(chip->base + GPIOMIS); @@ -209,8 +219,8 @@ static void pl061_irq_handler(unsigned irq, struct irq_desc *desc) if (pending == 0) continue; - for_each_bit(gpio, &pending, PL061_GPIO_NR) - generic_handle_irq(gpio_to_irq(gpio)); + for_each_bit(offset, &pending, PL061_GPIO_NR) + generic_handle_irq(pl061_to_irq(&chip->gc, offset)); } desc->chip->unmask(irq); } @@ -251,6 +261,7 @@ static int __init pl061_probe(struct amba_device *dev, struct amba_id *id) chip->gc.direction_output = pl061_direction_output; chip->gc.get = pl061_get_value; chip->gc.set = pl061_set_value; + chip->gc.to_irq = pl061_to_irq; chip->gc.base = pdata->gpio_base; chip->gc.ngpio = PL061_GPIO_NR; chip->gc.label = dev_name(&dev->dev); |