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media: video-i2c: check if chip struct has set_power function 

Not all future supported video chips will always have power management
support, and so it is important to check before calling set_power() is
defined.

Signed-off-by: Matt Ranostay <matt.ranostay@konsulko.com>
Reviewed-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
This commit is contained in:
Matt Ranostay 2018-11-24 17:03:23 -05:00 committed by Mauro Carvalho Chehab
parent 69d2a734c5
commit ac11da47ff
1 changed files with 17 additions and 5 deletions
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22
drivers/media/i2c/video-i2c.c
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@ -736,9 +736,11 @@ static int video_i2c_probe(struct i2c_client *client,
video_set_drvdata(&data->vdev, data);
i2c_set_clientdata(client, data);
ret = data->chip->set_power(data, true);
if (ret)
goto error_unregister_device;
if (data->chip->set_power) {
ret = data->chip->set_power(data, true);
if (ret)
goto error_unregister_device;
}
pm_runtime_get_noresume(&client->dev);
pm_runtime_set_active(&client->dev);
@ -767,7 +769,9 @@ error_pm_disable:
pm_runtime_disable(&client->dev);
pm_runtime_set_suspended(&client->dev);
pm_runtime_put_noidle(&client->dev);
data->chip->set_power(data, false);
if (data->chip->set_power)
data->chip->set_power(data, false);
error_unregister_device:
v4l2_device_unregister(v4l2_dev);
@ -791,7 +795,9 @@ static int video_i2c_remove(struct i2c_client *client)
pm_runtime_disable(&client->dev);
pm_runtime_set_suspended(&client->dev);
pm_runtime_put_noidle(&client->dev);
data->chip->set_power(data, false);
if (data->chip->set_power)
data->chip->set_power(data, false);
video_unregister_device(&data->vdev);
@ -804,6 +810,9 @@ static int video_i2c_pm_runtime_suspend(struct device *dev)
{
struct video_i2c_data *data = i2c_get_clientdata(to_i2c_client(dev));
if (!data->chip->set_power)
return 0;
return data->chip->set_power(data, false);
}
@ -811,6 +820,9 @@ static int video_i2c_pm_runtime_resume(struct device *dev)
{
struct video_i2c_data *data = i2c_get_clientdata(to_i2c_client(dev));
if (!data->chip->set_power)
return 0;
return data->chip->set_power(data, true);
}