If the timer frequency has not been configured yet get_gptimer_period() will
return 0. Handle this case instead of blindly dividing by the returned value.
Signed-off-by: Lars-Peter Clausen <lars@xxxxxxxxxx>
---
drivers/staging/iio/trigger/iio-trig-bfin-timer.c | 10 ++++++++--
1 file changed, 8 insertions(+), 2 deletions(-)
diff --git a/drivers/staging/iio/trigger/iio-trig-bfin-timer.c b/drivers/staging/iio/trigger/iio-trig-bfin-timer.c
index ce6a7b1..2772ea2 100644
--- a/drivers/staging/iio/trigger/iio-trig-bfin-timer.c
+++ b/drivers/staging/iio/trigger/iio-trig-bfin-timer.c
@@ -99,9 +99,15 @@ static ssize_t iio_bfin_tmr_frequency_show(struct device *dev,
{
struct iio_trigger *trig = to_iio_trigger(dev);
struct bfin_tmr_state *st = trig->private_data;
+ unsigned int period = get_gptimer_period(st->t->id);
+ unsigned long val;
- return sprintf(buf, "%lu\n",
- get_sclk() / get_gptimer_period(st->t->id));
+ if (period == 0)
+ val = 0;
+ else
+ val = get_sclk() / get_gptimer_period(st->t->id);
+
+ return sprintf(buf, "%lu\n", val);
}
static DEVICE_ATTR(frequency, S_IRUGO | S_IWUSR, iio_bfin_tmr_frequency_show,
--
1.7.10.4
--
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