diff options
| author | Mathias Nyman <mathias.nyman@linux.intel.com> | 2011-07-08 13:02:18 +0400 |
|---|---|---|
| committer | Grant Likely <grant.likely@secretlab.ca> | 2011-07-08 19:32:01 +0400 |
| commit | 2345b20fd9160d99f7cdf34e7b028ea351bf9c25 (patch) | |
| tree | fd0ed3845b64d9972abb332f4c39d20c5b5a1536 | |
| parent | 58956ba23e2dce83e78cd212cc8305261647684f (diff) | |
| download | linux-2345b20fd9160d99f7cdf34e7b028ea351bf9c25.tar.xz | |
gpio/langwell_gpio: ack the correct bit for langwell gpio interrupts
The wrong bit was masked when acking langwell gpio interrupts.
Reason for maskig the wrong bit was probably because__ffs() and ffs() functions
return bit indexes differently (0..31 vs 1..32)
This fixes langwell based devices from hanging when a gpio interrupt is
triggered and undoes the breakage which occurred in change set
732063b92bb727b27e61580ce278dddefe31c6ad
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
| -rw-r--r-- | drivers/gpio/langwell_gpio.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/gpio/langwell_gpio.c b/drivers/gpio/langwell_gpio.c index bd6571e0097a..644ba1255d3c 100644 --- a/drivers/gpio/langwell_gpio.c +++ b/drivers/gpio/langwell_gpio.c @@ -223,7 +223,7 @@ static void lnw_irq_handler(unsigned irq, struct irq_desc *desc) gedr = gpio_reg(&lnw->chip, base, GEDR); pending = readl(gedr); while (pending) { - gpio = __ffs(pending) - 1; + gpio = __ffs(pending); mask = BIT(gpio); pending &= ~mask; /* Clear before handling so we can't lose an edge */ |