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authorOliver Neukum <oliver@neukum.org>2009-11-09 19:09:49 -0300
committerMauro Carvalho Chehab <mchehab@redhat.com>2009-12-05 18:41:42 -0200
commitd89ce0d9ec9f980d59eae8d5a0ead98988e3b545 (patch)
tree38f34ca547e5b9d5e37fdc875072f34b7f4d7258
parent87918334792a4d8a73b0511466b77bd6aa055db3 (diff)
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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>
-rw-r--r--drivers/media/radio/radio-mr800.c14
1 files changed, 12 insertions, 2 deletions
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 @@ 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);