From ac11da47ff45f1f6f19c87cde6f36d9b17d42989 Mon Sep 17 00:00:00 2001 From: Matt Ranostay Date: Sat, 24 Nov 2018 17:03:23 -0500 Subject: [PATCH] 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 Reviewed-by: Akinobu Mita Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab --- drivers/media/i2c/video-i2c.c | 22 +++++++++++++++++----- 1 file changed, 17 insertions(+), 5 deletions(-) diff --git a/drivers/media/i2c/video-i2c.c b/drivers/media/i2c/video-i2c.c index b6ebb8d53e90..01dcf179f203 100644 --- a/drivers/media/i2c/video-i2c.c +++ b/drivers/media/i2c/video-i2c.c @@ -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); }