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>
diff --git a/drivers/media/radio/radio-mr800.c b/drivers/media/radio/radio-mr800.c
index 4064109..44efa68 100644
--- a/drivers/media/radio/radio-mr800.c
+++ b/drivers/media/radio/radio-mr800.c
@@ -132,6 +132,7 @@
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 @@
.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 @@
}
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 @@
if (!radio->usbdev)
retval = -EIO;
+ else
+ usb_autopm_put_interface(radio->intf);
mutex_unlock(&radio->lock);
return retval;
@@ -666,6 +675,7 @@
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);