[media] em28xx: print a message at disconnect

That helps to identify if something fails and explain why em28xx
struct is not freed (if it ever happens).

Reviewed-by: Frank Schäfer <fschaefer.oss@googlemail.com>
Tested-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

drivers/media/usb/em28xx/em28xx-audio.c

@@ -956,6 +956,8 @@ static int em28xx_audio_fini(struct em28xx *dev)
 		return 0;
 	}
 
+	em28xx_info("Closing audio extension");
+
 	snd_card_disconnect(dev->adev.sndcard);
 	em28xx_audio_free_urb(dev);
 

drivers/media/usb/em28xx/em28xx-dvb.c

@@ -1472,6 +1472,8 @@ static int em28xx_dvb_fini(struct em28xx *dev)
 		return 0;
 	}
 
+	em28xx_info("Closing DVB extension");
+
 	if (dev->dvb) {
 		struct em28xx_dvb *dvb = dev->dvb;
 

drivers/media/usb/em28xx/em28xx-input.c

@@ -810,6 +810,8 @@ static int em28xx_ir_fini(struct em28xx *dev)
 		return 0;
 	}
 
+	em28xx_info("Closing input extension");
+
 	em28xx_shutdown_buttons(dev);
 
 	/* skip detach on non attached boards */

drivers/media/usb/em28xx/em28xx-video.c

@@ -1894,6 +1894,8 @@ static int em28xx_v4l2_fini(struct em28xx *dev)
 		return 0;
 	}
 
+	em28xx_info("Closing video extension");
+
 	v4l2_device_disconnect(&dev->v4l2_dev);
 
 	em28xx_uninit_usb_xfer(dev, EM28XX_ANALOG_MODE);