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| author | Hans Verkuil <hverkuil@xs4all.nl> | 2010-11-14 09:36:23 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2010-12-01 20:10:05 -0200 |
| commit | 32958fdd1663aeaa23b5edbfbb0db684ffd4e20e (patch) | |
| tree | 849f927c20c352650b0d39110ac5d223941c4c44 /drivers/media/radio/radio-miropcm20.c | |
| parent | e53beacd23d9cb47590da6a7a7f6d417b941a994 (diff) | |
| download | talos-obmc-linux-32958fdd1663aeaa23b5edbfbb0db684ffd4e20e.tar.gz talos-obmc-linux-32958fdd1663aeaa23b5edbfbb0db684ffd4e20e.zip | |
[media] BKL: trivial BKL removal from V4L2 radio drivers
The patch converts a bunch of V4L2 radio drivers to unlocked_ioctl.
These are all simple conversions: most already had a lock and so the ioctl
fop could simply be replaced by unlocked_ioctl.
radio-miropcm20.c was converted to use the new V4L2 core lock.
While doing this work I noticed that many of these drivers initialized
some more fields or muted audio or something like that *after* creating
the device node. This should be done before the device node is created
to prevent problems. Especially hal tends to grab a device node as soon
as it is created.
In one or two cases the mutex_init was even done after the device creation!
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/radio/radio-miropcm20.c')
| -rw-r--r-- | drivers/media/radio/radio-miropcm20.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/media/radio/radio-miropcm20.c b/drivers/media/radio/radio-miropcm20.c index 4ff885445fd4..3fb76e3834c9 100644 --- a/drivers/media/radio/radio-miropcm20.c +++ b/drivers/media/radio/radio-miropcm20.c @@ -33,6 +33,7 @@ struct pcm20 { unsigned long freq; int muted; struct snd_miro_aci *aci; + struct mutex lock; }; static struct pcm20 pcm20_card = { @@ -72,7 +73,7 @@ static int pcm20_setfreq(struct pcm20 *dev, unsigned long freq) static const struct v4l2_file_operations pcm20_fops = { .owner = THIS_MODULE, - .ioctl = video_ioctl2, + .unlocked_ioctl = video_ioctl2, }; static int vidioc_querycap(struct file *file, void *priv, @@ -229,7 +230,7 @@ static int __init pcm20_init(void) return -ENODEV; } strlcpy(v4l2_dev->name, "miropcm20", sizeof(v4l2_dev->name)); - + mutex_init(&dev->lock); res = v4l2_device_register(NULL, v4l2_dev); if (res < 0) { @@ -242,6 +243,7 @@ static int __init pcm20_init(void) dev->vdev.fops = &pcm20_fops; dev->vdev.ioctl_ops = &pcm20_ioctl_ops; dev->vdev.release = video_device_release_empty; + dev->vdev.lock = &dev->lock; video_set_drvdata(&dev->vdev, dev); if (video_register_device(&dev->vdev, VFL_TYPE_RADIO, radio_nr) < 0) |
