ext4: Convert to host order before using the values.

(cherry picked from commit d94e99a64c3beece22dbfb2b335771a59184eb0a)

Use le16_to_cpu to read the s_reserved_gdt_blocks values
from super block.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index e1255cc1642362ee0dbea80f6116a9856349fe13..b6fdc2b38ba3f3ed5328bbf2013ff7b598863634 100644 (file)
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -1506,9 +1506,8 @@ static int ext4_fill_flex_info(struct super_block *sb)
 
        /* We allocate both existing and potentially added groups */
        flex_group_count = ((sbi->s_groups_count + groups_per_flex - 1) +
-                           ((sbi->s_es->s_reserved_gdt_blocks +1 ) <<
-                             EXT4_DESC_PER_BLOCK_BITS(sb))) /
-                          groups_per_flex;
+                       ((le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) + 1) <<
+                             EXT4_DESC_PER_BLOCK_BITS(sb))) / groups_per_flex;
        sbi->s_flex_groups = kzalloc(flex_group_count *
                                     sizeof(struct flex_groups), GFP_KERNEL);
        if (sbi->s_flex_groups == NULL) {