X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?p=pandora-kernel.git;a=blobdiff_plain;f=fs%2Fbtrfs%2Fextent-tree.c;h=bcd59c7dfb574def82517a80affe6a9ddf756a92;hp=0c097f3aec418564e25df5b7e0af8d9a81a79d1d;hb=aa3fc52546b847f590d86a093afd863ff9081628;hpb=76db8ac45fc738f7d7664fe9b56d15c594a45228

diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 0c097f3aec41..bcd59c7dfb57 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -3412,7 +3412,7 @@ again:
 	 * our reservation.
 	 */
 	if (unused <= space_info->total_bytes) {
-		unused -= space_info->total_bytes;
+		unused = space_info->total_bytes - unused;
 		if (unused >= num_bytes) {
 			if (!reserved)
 				space_info->bytes_reserved += orig_bytes;