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V4L/DVB (10052): radio-mr800: correct unplug, fix to previous patch 

This patch corrects unplug procedure, that was implemented wrong in
previous patch. New function usb_amradio_device_release added.
Disconnect lock removed.

Signed-off-by: Alexey Klimov <klimov.linux@gmail.com>
Signed-off-by: Douglas Schilling Landgraf <dougsland@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Alexey Klimov 2008-12-27 21:30:34 -03:00 committed by Mauro Carvalho Chehab
parent da3bcb5d90
commit f4e9043e5a
1 changed files with 19 additions and 19 deletions
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38
drivers/media/radio/radio-mr800.c
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@ -141,7 +141,6 @@ struct amradio_device {
unsigned char *buffer;
struct mutex lock; /* buffer locking */
struct mutex disconnect_lock;
int curfreq;
int stereo;
int users;
@ -302,16 +301,12 @@ static void usb_amradio_disconnect(struct usb_interface *intf)
{
struct amradio_device *radio = usb_get_intfdata(intf);
mutex_lock(&radio->disconnect_lock);
mutex_lock(&radio->lock);
radio->removed = 1;
usb_set_intfdata(intf, NULL);
mutex_unlock(&radio->lock);
if (radio->users == 0) {
video_unregister_device(radio->videodev);
kfree(radio->buffer);
kfree(radio);
}
mutex_unlock(&radio->disconnect_lock);
usb_set_intfdata(intf, NULL);
video_unregister_device(radio->videodev);
}
/* vidioc_querycap - query device capabilities */
@ -529,7 +524,7 @@ static int usb_amradio_open(struct inode *inode, struct file *file)
return 0;
}
/*close device - free driver structures */
/*close device */
static int usb_amradio_close(struct inode *inode, struct file *file)
{
struct amradio_device *radio = video_get_drvdata(video_devdata(file));
@ -538,21 +533,15 @@ static int usb_amradio_close(struct inode *inode, struct file *file)
if (!radio)
return -ENODEV;
mutex_lock(&radio->disconnect_lock);
radio->users = 0;
if (radio->removed) {
video_unregister_device(radio->videodev);
kfree(radio->buffer);
kfree(radio);
} else {
if (!radio->removed) {
retval = amradio_stop(radio);
if (retval < 0)
amradio_dev_warn(&radio->videodev->dev,
"amradio_stop failed\n");
}
mutex_unlock(&radio->disconnect_lock);
return 0;
}
@ -609,12 +598,24 @@ static const struct v4l2_ioctl_ops usb_amradio_ioctl_ops = {
.vidioc_s_input = vidioc_s_input,
};
static void usb_amradio_device_release(struct video_device *videodev)
{
struct amradio_device *radio = video_get_drvdata(videodev);
/* we call v4l to free radio->videodev */
video_device_release(videodev);
/* free rest memory */
kfree(radio->buffer);
kfree(radio);
}
/* V4L2 interface */
static struct video_device amradio_videodev_template = {
.name = "AverMedia MR 800 USB FM Radio",
.fops = &usb_amradio_fops,
.ioctl_ops = &usb_amradio_ioctl_ops,
.release = video_device_release,
.release = usb_amradio_device_release,
};
/* check if the device is present and register with v4l and
@ -652,7 +653,6 @@ static int usb_amradio_probe(struct usb_interface *intf,
radio->usbdev = interface_to_usbdev(intf);
radio->curfreq = 95.16 * FREQ_MUL;
mutex_init(&radio->disconnect_lock);
mutex_init(&radio->lock);
video_set_drvdata(radio->videodev, radio);