[patch-2.4.2] bugfix -- ENXIO for read/write beyond end of raw device

[Tigran Aivazian]

Hi Linus,

Yes, I know that Stephen had fixed this bug ages ago but, nevertheless, it
is still present in 2.4.2 and I don't know about his plans for resending
the patch -- but it is a part of the set I maintain so I just wanted to
bring it to your attention. Small bug, small obvious fix -- why not
consider it sooner rather than later?

Regards,
Tigran

diff -urN -X dontdiff linux/drivers/char/raw.c vmfs/drivers/char/raw.c
--- linux/drivers/char/raw.c	Mon Oct  2 04:35:15 2000
+++ vmfs/drivers/char/raw.c	Thu Feb 22 07:21:26 2001
@@ -277,8 +277,11 @@
 	
 	if ((*offp & sector_mask) || (size & sector_mask))
 		return -EINVAL;
-	if ((*offp >> sector_bits) > limit)
+	if ((*offp >> sector_bits) >= limit) {
+		if (size)
+			return -ENXIO;
 		return 0;
+	}
 
 	/* 
 	 * We'll just use one kiobuf