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V4L/DVB (13402): radio-mr800 - autosuspend for radio-mr800 driver 

Patch adds autosuspend support for mr800 radio driver.

Signed-off-by: Oliver Neukum <oliver@neukum.org>
Acked-by: Alexey Klimov <klimov.linux@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Oliver Neukum 2009-11-09 19:09:49 -03:00 committed by Mauro Carvalho Chehab
parent 8791833479
commit d89ce0d9ec
1 changed files with 12 additions and 2 deletions
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14
drivers/media/radio/radio-mr800.c
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@ -132,6 +132,7 @@ static int usb_amradio_resume(struct usb_interface *intf);
struct amradio_device {
/* reference to USB and video device */
struct usb_device *usbdev;
struct usb_interface *intf;
struct video_device videodev;
struct v4l2_device v4l2_dev;
@ -163,7 +164,7 @@ static struct usb_driver usb_amradio_driver = {
.resume = usb_amradio_resume,
.reset_resume = usb_amradio_resume,
.id_table = usb_amradio_device_table,
.supports_autosuspend = 0,
.supports_autosuspend = 1,
};
/* switch on/off the radio. Send 8 bytes to device */
@ -506,9 +507,15 @@ static int usb_amradio_open(struct file *file)
}
file->private_data = radio;
retval = usb_autopm_get_interface(radio->intf);
if (retval)
goto unlock;
if (unlikely(!radio->initialized))
if (unlikely(!radio->initialized)) {
retval = usb_amradio_init(radio);
if (retval)
usb_autopm_put_interface(radio->intf);
}
unlock:
mutex_unlock(&radio->lock);
@ -525,6 +532,8 @@ static int usb_amradio_close(struct file *file)
if (!radio->usbdev)
retval = -EIO;
else
usb_autopm_put_interface(radio->intf);
mutex_unlock(&radio->lock);
return retval;
@ -666,6 +675,7 @@ static int usb_amradio_probe(struct usb_interface *intf,
radio->videodev.release = usb_amradio_video_device_release;
radio->usbdev = interface_to_usbdev(intf);
radio->intf = intf;
radio->curfreq = 95.16 * FREQ_MUL;
mutex_init(&radio->lock);