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authorHans Verkuil <hverkuil@xs4all.nl>2011-01-17 20:25:11 -0300
committerMauro Carvalho Chehab <mchehab@redhat.com>2011-03-22 16:38:09 -0300
commit13099294973b14f07915d0342af2be8fa0af589b (patch)
tree0b755cadc08407c29f0046c83f03df40e7c568cf
parente64d07c92daa5c7973c1d4433f939a4e0fa3beb9 (diff)
downloadlinux-linaro-stable-13099294973b14f07915d0342af2be8fa0af589b.tar.gz
[media] dsbr100: ensure correct disconnect sequence
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
-rw-r--r--drivers/media/radio/dsbr100.c59
1 files changed, 12 insertions, 47 deletions
diff --git a/drivers/media/radio/dsbr100.c b/drivers/media/radio/dsbr100.c
index bf2dd6ff042a..3d8cc425fa6b 100644
--- a/drivers/media/radio/dsbr100.c
+++ b/drivers/media/radio/dsbr100.c
@@ -129,7 +129,7 @@ devices, that would be 76 and 91. */
#define STARTED 0
#define STOPPED 1
-#define videodev_to_radio(d) container_of(d, struct dsbr100_device, videodev)
+#define v4l2_dev_to_radio(d) container_of(d, struct dsbr100_device, v4l2_dev)
static int usb_dsbr100_probe(struct usb_interface *intf,
const struct usb_device_id *id);
@@ -151,7 +151,6 @@ struct dsbr100_device {
struct mutex v4l2_lock;
int curfreq;
int stereo;
- int removed;
int status;
};
@@ -346,10 +345,6 @@ static int vidioc_g_tuner(struct file *file, void *priv,
{
struct dsbr100_device *radio = video_drvdata(file);
- /* safety check */
- if (radio->removed)
- return -EIO;
-
if (v->index > 0)
return -EINVAL;
@@ -371,16 +366,7 @@ static int vidioc_g_tuner(struct file *file, void *priv,
static int vidioc_s_tuner(struct file *file, void *priv,
struct v4l2_tuner *v)
{
- struct dsbr100_device *radio = video_drvdata(file);
-
- /* safety check */
- if (radio->removed)
- return -EIO;
-
- if (v->index > 0)
- return -EINVAL;
-
- return 0;
+ return v->index ? -EINVAL : 0;
}
static int vidioc_s_frequency(struct file *file, void *priv,
@@ -389,10 +375,6 @@ static int vidioc_s_frequency(struct file *file, void *priv,
struct dsbr100_device *radio = video_drvdata(file);
int retval;
- /* safety check */
- if (radio->removed)
- return -EIO;
-
radio->curfreq = f->frequency;
retval = dsbr100_setfreq(radio);
@@ -406,10 +388,6 @@ static int vidioc_g_frequency(struct file *file, void *priv,
{
struct dsbr100_device *radio = video_drvdata(file);
- /* safety check */
- if (radio->removed)
- return -EIO;
-
f->type = V4L2_TUNER_RADIO;
f->frequency = radio->curfreq;
return 0;
@@ -431,10 +409,6 @@ static int vidioc_g_ctrl(struct file *file, void *priv,
{
struct dsbr100_device *radio = video_drvdata(file);
- /* safety check */
- if (radio->removed)
- return -EIO;
-
switch (ctrl->id) {
case V4L2_CID_AUDIO_MUTE:
ctrl->value = radio->status;
@@ -449,10 +423,6 @@ static int vidioc_s_ctrl(struct file *file, void *priv,
struct dsbr100_device *radio = video_drvdata(file);
int retval;
- /* safety check */
- if (radio->removed)
- return -EIO;
-
switch (ctrl->id) {
case V4L2_CID_AUDIO_MUTE:
if (ctrl->value) {
@@ -494,17 +464,13 @@ static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
static int vidioc_s_input(struct file *filp, void *priv, unsigned int i)
{
- if (i != 0)
- return -EINVAL;
- return 0;
+ return i ? -EINVAL : 0;
}
static int vidioc_s_audio(struct file *file, void *priv,
struct v4l2_audio *a)
{
- if (a->index != 0)
- return -EINVAL;
- return 0;
+ return a->index ? -EINVAL : 0;
}
/* USB subsystem interface begins here */
@@ -519,14 +485,13 @@ static void usb_dsbr100_disconnect(struct usb_interface *intf)
{
struct dsbr100_device *radio = usb_get_intfdata(intf);
- usb_set_intfdata(intf, NULL);
-
+ v4l2_device_get(&radio->v4l2_dev);
mutex_lock(&radio->v4l2_lock);
- radio->removed = 1;
- mutex_unlock(&radio->v4l2_lock);
-
+ usb_set_intfdata(intf, NULL);
video_unregister_device(&radio->videodev);
v4l2_device_disconnect(&radio->v4l2_dev);
+ mutex_unlock(&radio->v4l2_lock);
+ v4l2_device_put(&radio->v4l2_dev);
}
@@ -576,9 +541,9 @@ static int usb_dsbr100_resume(struct usb_interface *intf)
}
/* free data structures */
-static void usb_dsbr100_video_device_release(struct video_device *videodev)
+static void usb_dsbr100_release(struct v4l2_device *v4l2_dev)
{
- struct dsbr100_device *radio = videodev_to_radio(videodev);
+ struct dsbr100_device *radio = v4l2_dev_to_radio(v4l2_dev);
v4l2_device_unregister(&radio->v4l2_dev);
kfree(radio->transfer_buffer);
@@ -627,6 +592,7 @@ static int usb_dsbr100_probe(struct usb_interface *intf,
}
v4l2_dev = &radio->v4l2_dev;
+ v4l2_dev->release = usb_dsbr100_release;
retval = v4l2_device_register(&intf->dev, v4l2_dev);
if (retval < 0) {
@@ -641,10 +607,9 @@ static int usb_dsbr100_probe(struct usb_interface *intf,
radio->videodev.v4l2_dev = v4l2_dev;
radio->videodev.fops = &usb_dsbr100_fops;
radio->videodev.ioctl_ops = &usb_dsbr100_ioctl_ops;
- radio->videodev.release = usb_dsbr100_video_device_release;
+ radio->videodev.release = video_device_release_empty;
radio->videodev.lock = &radio->v4l2_lock;
- radio->removed = 0;
radio->usbdev = interface_to_usbdev(intf);
radio->curfreq = FREQ_MIN * FREQ_MUL;
radio->status = STOPPED;