ext4: print error when argument of inode_readahead_blk is invalid

If argument of inode_readahead_blk is too big, we just bail out
without printing any error. Fix this since it could confuse users.

Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>

1 files changed, 4 insertions, 5 deletions

diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 9b36c11baad9..b68f4b671bc7 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -1555,11 +1555,10 @@ static int handle_mount_opt(struct super_block *sb, char *opt, int token,
         } else if (token == Opt_min_batch_time) {
                 sbi->s_min_batch_time = arg;
         } else if (token == Opt_inode_readahead_blks) {
-                if (arg > (1 << 30))
-                        return -1;
-                if (arg && !is_power_of_2(arg)) {
-                        ext4_msg(sb, KERN_ERR, "EXT4-fs: inode_readahead_blks"
-                                 " must be a power of 2");
+                if (arg && (arg > (1 << 30) || !is_power_of_2(arg))) {
+                        ext4_msg(sb, KERN_ERR,
+                                 "EXT4-fs: inode_readahead_blks must be "
+                                 "0 or a power of 2 smaller than 2^31");
                         return -1;
                 }
                 sbi->s_inode_readahead_blks = arg;