[media] em28xx: improve extension information messages

Add a message with consistent prints before and after each
extension initialization, and provide a better text for module
load.

While here, add a missing sanity check for extension finish
code at em28xx-v4l extension.
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

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

@@ -649,7 +649,8 @@ static int em28xx_audio_init(struct em28xx *dev)
 		return 0;
 	}
 
-	printk(KERN_INFO "em28xx-audio.c: probing for em28xx Audio Vendor Class\n");
+	em28xx_info("Binding audio extension\n");
+
 	printk(KERN_INFO "em28xx-audio.c: Copyright (C) 2006 Markus "
 			 "Rechberger\n");
 	printk(KERN_INFO "em28xx-audio.c: Copyright (C) 2007-2011 Mauro Carvalho Chehab\n");
@@ -702,6 +703,7 @@ static int em28xx_audio_init(struct em28xx *dev)
 	adev->sndcard = card;
 	adev->udev = dev->udev;
 
+	em28xx_info("Audio extension successfully initialized\n");
 	return 0;
 }
 

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

@@ -1069,7 +1069,7 @@ int em28xx_register_extension(struct em28xx_ops *ops)
 		ops->init(dev);
 	}
 	mutex_unlock(&em28xx_devlist_mutex);
-	printk(KERN_INFO "Em28xx: Initialized (%s) extension\n", ops->name);
+	printk(KERN_INFO "em28xx: Registered (%s) extension\n", ops->name);
 	return 0;
 }
 EXPORT_SYMBOL(em28xx_register_extension);

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

@@ -274,7 +274,7 @@ static int em28xx_stop_feed(struct dvb_demux_feed *feed)
 static int em28xx_dvb_bus_ctrl(struct dvb_frontend *fe, int acquire)
 {
 	struct em28xx_i2c_bus *i2c_bus = fe->dvb->priv;
-        struct em28xx *dev = i2c_bus->dev;
+	struct em28xx *dev = i2c_bus->dev;
 
 	if (acquire)
 		return em28xx_set_mode(dev, EM28XX_DIGITAL_MODE);
@@ -992,10 +992,11 @@ static int em28xx_dvb_init(struct em28xx *dev)
 
 	if (!dev->board.has_dvb) {
 		/* This device does not support the extension */
-		printk(KERN_INFO "em28xx_dvb: This device does not support the extension\n");
 		return 0;
 	}
 
+	em28xx_info("Binding DVB extension\n");
+
 	dvb = kzalloc(sizeof(struct em28xx_dvb), GFP_KERNEL);
 
 	if (dvb == NULL) {
@@ -1407,7 +1408,7 @@ static int em28xx_dvb_init(struct em28xx *dev)
 	/* MFE lock */
 	dvb->adapter.mfe_shared = mfe_shared;
 
-	em28xx_info("Successfully loaded em28xx-dvb\n");
+	em28xx_info("DVB extension successfully initialized\n");
 ret:
 	em28xx_set_mode(dev, EM28XX_SUSPEND);
 	mutex_unlock(&dev->lock);

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

@@ -692,6 +692,8 @@ static int em28xx_ir_init(struct em28xx *dev)
 		return 0;
 	}
 
+	em28xx_info("Registering input extension\n");
+
 	ir = kzalloc(sizeof(*ir), GFP_KERNEL);
 	rc = rc_allocate_device();
 	if (!ir || !rc)
@@ -785,6 +787,8 @@ static int em28xx_ir_init(struct em28xx *dev)
 	if (err)
 		goto error;
 
+	em28xx_info("Input extension successfully initalized\n");
+
 	return 0;
 
 error:

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

@@ -2216,8 +2216,7 @@ static int em28xx_v4l2_init(struct em28xx *dev)
 		return 0;
 	}
 
-	printk(KERN_INFO "%s: v4l2 driver version %s\n",
-		dev->name, EM28XX_VERSION);
+	em28xx_info("Registering V4L2 extension\n");
 
 	mutex_lock(&dev->lock);
 
@@ -2499,6 +2498,8 @@ static int em28xx_v4l2_init(struct em28xx *dev)
 	/* initialize videobuf2 stuff */
 	em28xx_vb2_setup(dev);
 
+	em28xx_info("V4L2 extension successfully initialized\n");
+
 	mutex_unlock(&dev->lock);
 	return 0;