From: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Date: Wed, 20 Aug 2008 01:16:54 +0000 (-0400)
Subject: ext4: make sure ext4_has_free_blocks returns 0 for ENOSPC
X-Git-Url: http://www.pilppa.org/gitweb/gitweb.cgi?a=commitdiff_plain;h=16eb72956496594d023a7d7cd14a86404ad195ad;p=linux-2.6-omap-h63xx.git

ext4: make sure ext4_has_free_blocks returns 0 for ENOSPC

Fix ext4_has_free_blocks() to return 0 when we don't have enough space.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Mingming Cao <cmm@us.ibm.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
---

diff --git a/fs/ext4/balloc.c b/fs/ext4/balloc.c
index 1ae5004e93f..e9fa960ba6d 100644
--- a/fs/ext4/balloc.c
+++ b/fs/ext4/balloc.c
@@ -1626,6 +1626,9 @@ ext4_fsblk_t ext4_has_free_blocks(struct ext4_sb_info *sbi,
 		free_blocks =
 			percpu_counter_sum_and_set(&sbi->s_freeblocks_counter);
 #endif
+	if (free_blocks <= root_blocks)
+		/* we don't have free space */
+		return 0;
 	if (free_blocks - root_blocks < nblocks)
 		return free_blocks - root_blocks;
 	return nblocks;