linux-ext4 - [PATCH 2/2] ext3: don't forget to discard last block in a group

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Date:	Thu,  1 Mar 2012 14:40:07 +0100
From:	Lukas Czerner <lczerner@...hat.com>
To:	linux-ext4@...r.kernel.org
Cc:	tytso@....edu, Lukas Czerner <lczerner@...hat.com>
Subject: [PATCH 2/2] ext3: don't forget to discard last block in a group

Currently we might omit to discard the last block in the group (max)
because of off-by-one condition error. This commit fixes the condition
so we always discard the whole range if possible.

Signed-off-by: Lukas Czerner <lczerner@...hat.com>
---
 fs/ext3/balloc.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/fs/ext3/balloc.c b/fs/ext3/balloc.c
index e3a8d9e..997da27 100644
--- a/fs/ext3/balloc.c
+++ b/fs/ext3/balloc.c
@@ -1970,7 +1970,7 @@ static ext3_grpblk_t ext3_trim_all_free(struct super_block *sb,
 	sbi = EXT3_SB(sb);
 
 	 /* Walk through the whole group */
-	while (start < max) {
+	while (start <= max) {
 		start = bitmap_search_next_usable_block(start, bitmap_bh, max);
 		if (start < 0)
 			break;
@@ -1980,7 +1980,7 @@ static ext3_grpblk_t ext3_trim_all_free(struct super_block *sb,
 		 * Allocate contiguous free extents by setting bits in the
 		 * block bitmap
 		 */
-		while (next < max
+		while (next <= max
 			&& claim_block(sb_bgl_lock(sbi, group),
 					next, bitmap_bh)) {
 			next++;
-- 
1.7.4.4

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