diff options
| author | Sakari Ailus <sakari.ailus@linux.intel.com> | 2014-08-05 08:01:08 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <m.chehab@samsung.com> | 2014-09-03 08:50:25 -0300 |
| commit | 58e43d90b9cb75b4dd42ba1481d83011fa7412df (patch) | |
| tree | 21c41543ca3c93b61e091eec2b09bb67b4eb3e0c /drivers/media | |
| parent | 7d1311b93e58ed55f3a31cc8f94c4b8fe988a2b9 (diff) | |
| download | op-kernel-dev-58e43d90b9cb75b4dd42ba1481d83011fa7412df.zip op-kernel-dev-58e43d90b9cb75b4dd42ba1481d83011fa7412df.tar.gz | |
[media] smiapp: Fix power count handling
The sensor may be powered by either one of its sub-devices being accessed
from the user space (an open file handle) or by its s_power() op being
called with non-zero on argument. The driver counts the users and if any
reason to keep the device powered exists it will be powered.
However, a faulty condition was used in recognising the need to power off
the sensor, leading it to be powered off every time any of its uses went
away.
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
Diffstat (limited to 'drivers/media')
| -rw-r--r-- | drivers/media/i2c/smiapp/smiapp-core.c | 11 |
1 files changed, 2 insertions, 9 deletions
diff --git a/drivers/media/i2c/smiapp/smiapp-core.c b/drivers/media/i2c/smiapp/smiapp-core.c index 1eaf975..632bd9e 100644 --- a/drivers/media/i2c/smiapp/smiapp-core.c +++ b/drivers/media/i2c/smiapp/smiapp-core.c @@ -1282,19 +1282,12 @@ static int smiapp_set_power(struct v4l2_subdev *subdev, int on) mutex_lock(&sensor->power_mutex); - /* - * If the power count is modified from 0 to != 0 or from != 0 - * to 0, update the power state. - */ - if (!sensor->power_count == !on) - goto out; - - if (on) { + if (on && !sensor->power_count) { /* Power on and perform initialisation. */ ret = smiapp_power_on(sensor); if (ret < 0) goto out; - } else { + } else if (!on && sensor->power_count == 1) { smiapp_power_off(sensor); } |
