in_illuminance_scale_available_show() references the
isl29018_chip->int_time variable in three places inside a for loop.
The value of the int_time variable can be updated by the
isl29018_set_integration_time() function, which is called by the
isl29018_write_raw() function. isl29018_write_raw() locks a
mutex specific to this driver when the integration time variable is
updated.
Signed-off-by: Brian Masney <masn...@onstation.org>
---
drivers/staging/iio/light/isl29018.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/staging/iio/light/isl29018.c
b/drivers/staging/iio/light/isl29018.c
index 19f282c..990c6e5 100644
--- a/drivers/staging/iio/light/isl29018.c
+++ b/drivers/staging/iio/light/isl29018.c
@@ -277,10 +277,12 @@ static ssize_t in_illuminance_scale_available_show
unsigned int i;
int len = 0;
+ mutex_lock(&chip->lock);
for (i = 0; i < ARRAY_SIZE(isl29018_scales[chip->int_time]); ++i)
len += sprintf(buf + len, "%d.%06d ",
isl29018_scales[chip->int_time][i].scale,
isl29018_scales[chip->int_time][i].uscale);
+ mutex_unlock(&chip->lock);
buf[len - 1] = '\n';
--
2.7.4
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