diff --git a/fs/ufs/super.c b/fs/ufs/super.c
index 54828ebcf1bacda4d1c94dc4461cd99d8264234d..2ba11a9aa995964721b9edd08ee1a0b1b3c0f688 100644
--- a/fs/ufs/super.c
+++ b/fs/ufs/super.c
@@ -1296,8 +1296,10 @@ static ssize_t ufs_quota_write(struct super_block *sb, int type,
 		blk++;
 	}
 out:
-	if (len == towrite)
+	if (len == towrite) {
+		up(&inode->i_sem);
 		return err;
+	}
 	if (inode->i_size < off+len-towrite)
 		i_size_write(inode, off+len-towrite);
 	inode->i_version++;