linux-kernel - [PATCH] tty_io.c: keep davej sane

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Message-ID: <20060802230210.GB6825@martell.zuzino.mipt.ru>
Date:	Thu, 3 Aug 2006 03:02:11 +0400
From:	Alexey Dobriyan <adobriyan@...il.com>
To:	Dave Jones <davej@...hat.com>, linux-kernel@...r.kernel.org
Cc:	Andrew Morton <akpm@...l.org>
Subject: [PATCH] tty_io.c: keep davej sane

On Wed, Aug 02, 2006 at 06:37:33PM -0400, Dave Jones wrote:
> On Wed, Aug 02, 2006 at 06:36:04PM -0400, Dave Jones wrote:
>  > I knew I'd regret digging in the tty code.
>  > Can someone enlighten me as to what this *should* be doing?
>  > 
>  > int tty_insert_flip_string(struct tty_struct *tty, const unsigned char *chars,
>  >                 size_t size)
>  > {   
>  >    	.... 
>  >     /* There is a small chance that we need to split the data over
>  >        several buffers. If this is the case we must loop */
>  >     while (unlikely(size > copied));
>  >     return copied;
>  > }   
>  > 
>  > 
>  > Looping I can understand, but forever ?
>  > Given we're not advancing 'copied', can we just kill that while loop?
>  > Or should we be changing it with each iteration?
> 
> Disregard, it's the end of a do { } while.

don't hold back, i need your ack

> I've been staring at this too long.

[PATCH] tty_io.c: keep davej sane

Just comment and next "while" look _very_ wrong. Place { correctly to
hint unsuspecting ones that it's the end of the loop actually.

Signed-off-by: Alexey Dobriyan <adobriyan@...il.com>
---

 drivers/char/tty_io.c |   14 ++++++--------
 1 file changed, 6 insertions(+), 8 deletions(-)

--- a/drivers/char/tty_io.c
+++ b/drivers/char/tty_io.c
@@ -362,10 +362,9 @@ int tty_insert_flip_string(struct tty_st
 		tb->used += space;
 		copied += space;
 		chars += space;
-	}
-	/* There is a small chance that we need to split the data over
-	   several buffers. If this is the case we must loop */
-	while (unlikely(size > copied));
+		/* There is a small chance that we need to split the data over
+		   several buffers. If this is the case we must loop */
+	} while (unlikely(size > copied));
 	return copied;
 }
 EXPORT_SYMBOL(tty_insert_flip_string);
@@ -386,10 +385,9 @@ int tty_insert_flip_string_flags(struct 
 		copied += space;
 		chars += space;
 		flags += space;
-	}
-	/* There is a small chance that we need to split the data over
-	   several buffers. If this is the case we must loop */
-	while (unlikely(size > copied));
+		/* There is a small chance that we need to split the data over
+		   several buffers. If this is the case we must loop */
+	} while (unlikely(size > copied));
 	return copied;
 }
 EXPORT_SYMBOL(tty_insert_flip_string_flags);

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