dsbr100: fix and add rigth comments

diff -r 91319c812b7b linux/drivers/media/radio/dsbr100.c
@@ -1,5 +1,5 @@
-/* A driver for the D-Link DSB-R100 USB radio.  The R100 plugs
- into both the USB and an analog audio input, so this thing
+/* A driver for the D-Link DSB-R100 USB radio and Gemtek USB Radio 21.
+ The device plugs into both the USB and an analog audio input, so this thing
  only deals with initialisation and frequency setting, the
  audio data has to be handled by a sound driver.
 

@@ -173,7 +173,6 @@
 	int muted;
 };
 
-
 static struct usb_device_id usb_dsbr100_device_table [] = {
 	{ USB_DEVICE(DSB100_VENDOR, DSB100_PRODUCT) },
 	{ }						/* Terminating entry */

@@ -226,7 +225,6 @@
 	mutex_unlock(&radio->lock);
 	return (radio->transfer_buffer)[0];
 }
-
 
 /* switch off radio */
 static int dsbr100_stop(struct dsbr100_device *radio)

@@ -320,13 +318,14 @@
 	mutex_unlock(&radio->lock);
 }
 
-
 /* USB subsystem interface begins here */
 
-/* handle unplugging of the device, release data structures
-if nothing keeps us from doing it.  If something is still
-keeping us busy, the release callback of v4l will take care
-of releasing it. */
+/*
+ * Handle unplugging of the device.
+ * We call video_unregister_device in any case.
+ * The last function called in this procedure is
+ * usb_dsbr100_video_device_release
+ */
 static void usb_dsbr100_disconnect(struct usb_interface *intf)
 {
 	struct dsbr100_device *radio = usb_get_intfdata(intf);

@@ -597,6 +596,7 @@
 	return 0;
 }
 
+/* free data structures */
 static void usb_dsbr100_video_device_release(struct video_device *videodev)
 {
 	struct dsbr100_device *radio = videodev_to_radio(videodev);

@@ -640,8 +640,7 @@
 	.release	= usb_dsbr100_video_device_release,
 };
 
-/* check if the device is present and register with v4l and
-usb if it is */
+/* check if the device is present and register with v4l and usb if it is */
 static int usb_dsbr100_probe(struct usb_interface *intf,
 				const struct usb_device_id *id)
 {