ppdev: reduce kernel log spam

One of my programs frequently grabs the parport, does something with it
and then drops it again. This results in spamming of the kernel log with

"... registered pardevice"
"... unregistered pardevice"

These messages are completely useless, except for debugging ppdev,
probably. So put them under DEBUG (or dynamic debug).

Signed-off-by: Michael Buesch <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

drivers/char/ppdev.c

···
 
 	if (!(pp->flags & PP_CLAIMED)) {
 		/* Don't have the port claimed */
-		printk (KERN_DEBUG CHRDEV "%x: claim the port first\n",
-			minor);
+		pr_debug(CHRDEV "%x: claim the port first\n", minor);
 		return -EINVAL;
 	}
 
···
 
 	if (!(pp->flags & PP_CLAIMED)) {
 		/* Don't have the port claimed */
-		printk (KERN_DEBUG CHRDEV "%x: claim the port first\n",
-			minor);
+		pr_debug(CHRDEV "%x: claim the port first\n", minor);
 		return -EINVAL;
 	}
 
···
 	}
 
 	pp->pdev = pdev;
-	printk (KERN_DEBUG "%s: registered pardevice\n", name);
+	pr_debug("%s: registered pardevice\n", name);
 	return 0;
 }
 
···
 		int ret;
 
 		if (pp->flags & PP_CLAIMED) {
-			printk (KERN_DEBUG CHRDEV
-				"%x: you've already got it!\n", minor);
+			pr_debug(CHRDEV "%x: you've already got it!\n", minor);
 			return -EINVAL;
 		}
 
···
 	    }
 	case PPEXCL:
 		if (pp->pdev) {
-			printk (KERN_DEBUG CHRDEV "%x: too late for PPEXCL; "
+			pr_debug(CHRDEV "%x: too late for PPEXCL; "
 				"already registered\n", minor);
 			if (pp->flags & PP_EXCL)
 				/* But it's not really an error. */
···
 	/* Everything else requires the port to be claimed, so check
 	 * that now. */
 	if ((pp->flags & PP_CLAIMED) == 0) {
-		printk (KERN_DEBUG CHRDEV "%x: claim the port first\n",
-			minor);
+		pr_debug(CHRDEV "%x: claim the port first\n", minor);
 		return -EINVAL;
 	}
 
···
 		return 0;
 
 	default:
-		printk (KERN_DEBUG CHRDEV "%x: What? (cmd=0x%x)\n", minor,
-			cmd);
+		pr_debug(CHRDEV "%x: What? (cmd=0x%x)\n", minor, cmd);
 		return -EINVAL;
 	}
 
···
 	}
 	if (compat_negot) {
 		parport_negotiate (pp->pdev->port, IEEE1284_MODE_COMPAT);
-		printk (KERN_DEBUG CHRDEV
-			"%x: negotiated back to compatibility mode because "
-			"user-space forgot\n", minor);
+		pr_debug(CHRDEV "%x: negotiated back to compatibility "
+			"mode because user-space forgot\n", minor);
 	}
 
 	if (pp->flags & PP_CLAIMED) {
···
 		info->phase = pp->saved_state.phase;
 		parport_release (pp->pdev);
 		if (compat_negot != 1) {
-			printk (KERN_DEBUG CHRDEV "%x: released pardevice "
+			pr_debug(CHRDEV "%x: released pardevice "
 				"because user-space forgot\n", minor);
 		}
 	}
···
 		parport_unregister_device (pp->pdev);
 		kfree (name);
 		pp->pdev = NULL;
-		printk (KERN_DEBUG CHRDEV "%x: unregistered pardevice\n",
-			minor);
+		pr_debug(CHRDEV "%x: unregistered pardevice\n", minor);
 	}
 
 	kfree (pp);