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 <mb@bu3sch.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/char/ppdev.c

@@ -114,8 +114,7 @@ static ssize_t pp_read (struct file * file, char __user * buf, size_t count,
 
 	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;
 	}
 
@@ -198,8 +197,7 @@ static ssize_t pp_write (struct file * file, const char __user * buf,
 
 	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;
 	}
 
@@ -313,7 +311,7 @@ static int register_device (int minor, struct pp_struct *pp)
 	}
 
 	pp->pdev = pdev;
-	printk (KERN_DEBUG "%s: registered pardevice\n", name);
+	pr_debug("%s: registered pardevice\n", name);
 	return 0;
 }
 
@@ -343,8 +341,7 @@ static int pp_do_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 		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;
 		}
 
@@ -379,7 +376,7 @@ static int pp_do_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 	    }
 	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. */
@@ -491,8 +488,7 @@ static int pp_do_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 	/* 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;
 	}
 
@@ -624,8 +620,7 @@ static int pp_do_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 		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;
 	}
 
@@ -698,9 +693,8 @@ static int pp_release (struct inode * inode, struct file * file)
 	}
 	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) {
@@ -713,7 +707,7 @@ static int pp_release (struct inode * inode, struct file * file)
 		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);
 		}
 	}
@@ -723,8 +717,7 @@ static int pp_release (struct inode * inode, struct file * file)
 		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);