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-rw-r--r--fs/ext4/super.c9
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,
1555 } else if (token == Opt_min_batch_time) { 1555 } else if (token == Opt_min_batch_time) {
1556 sbi->s_min_batch_time = arg; 1556 sbi->s_min_batch_time = arg;
1557 } else if (token == Opt_inode_readahead_blks) { 1557 } else if (token == Opt_inode_readahead_blks) {
1558 if (arg > (1 << 30)) 1558 if (arg && (arg > (1 << 30) || !is_power_of_2(arg))) {
1559 return -1; 1559 ext4_msg(sb, KERN_ERR,
1560 if (arg && !is_power_of_2(arg)) { 1560 "EXT4-fs: inode_readahead_blks must be "
1561 ext4_msg(sb, KERN_ERR, "EXT4-fs: inode_readahead_blks" 1561 "0 or a power of 2 smaller than 2^31");
1562 " must be a power of 2");
1563 return -1; 1562 return -1;
1564 } 1563 }
1565 sbi->s_inode_readahead_blks = arg; 1564 sbi->s_inode_readahead_blks = arg;