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[media] smiapp: Fix resource management in registration failure 

If the registered() callback failed, resources were left unaccounted for.
Fix this, as well as add unregistering the sub-devices in driver
unregistered() callback.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Sebastian Reichel <sre@kernel.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This commit is contained in:
Sakari Ailus 2016-09-19 18:41:14 -03:00 committed by Mauro Carvalho Chehab
parent 231d1a014a
commit 9976954075
1 changed files with 21 additions and 1 deletions
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22
drivers/media/i2c/smiapp/smiapp-core.c
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@ -2524,12 +2524,22 @@ static int smiapp_register_subdev(struct smiapp_sensor *sensor,
if (rval) {
dev_err(&client->dev,
"media_create_pad_link failed\n");
v4l2_device_unregister_subdev(&ssd->sd);
return rval;
}
return 0;
}
static void smiapp_unregistered(struct v4l2_subdev *subdev)
{
struct smiapp_sensor *sensor = to_smiapp_sensor(subdev);
unsigned int i;
for (i = 1; i < sensor->ssds_used; i++)
v4l2_device_unregister_subdev(&sensor->ssds[i].sd);
}
static int smiapp_registered(struct v4l2_subdev *subdev)
{
struct smiapp_sensor *sensor = to_smiapp_sensor(subdev);
@ -2544,10 +2554,19 @@ static int smiapp_registered(struct v4l2_subdev *subdev)
return rval;
}
return smiapp_register_subdev(
rval = smiapp_register_subdev(
sensor, sensor->pixel_array, sensor->binner,
SMIAPP_PA_PAD_SRC, SMIAPP_PAD_SINK,
MEDIA_LNK_FL_ENABLED | MEDIA_LNK_FL_IMMUTABLE);
if (rval)
goto out_err;
return 0;
out_err:
smiapp_unregistered(subdev);
return rval;
}
static void smiapp_cleanup(struct smiapp_sensor *sensor)
@ -2894,6 +2913,7 @@ static const struct media_entity_operations smiapp_entity_ops = {
static const struct v4l2_subdev_internal_ops smiapp_internal_src_ops = {
.registered = smiapp_registered,
.unregistered = smiapp_unregistered,
.open = smiapp_open,
.close = smiapp_close,
};