1 files changed, 5 insertions, 4 deletions

diff --git a/fs/fat/inode.c b/fs/fat/inode.c
index 78e363c844cb..68cb5a6eb539 100644
--- a/fs/fat/inode.c
+++ b/fs/fat/inode.c
@@ -662,7 +662,8 @@ static int __fat_write_inode(struct inode *inode, int wait)
         struct buffer_head *bh;
         struct msdos_dir_entry *raw_entry;
         loff_t i_pos;
-        int err;
+        sector_t blocknr;
+        int err, offset;
 
         if (inode->i_ino == MSDOS_ROOT_INO)
                 return 0;
@@ -672,7 +673,8 @@ retry:
         if (!i_pos)
                 return 0;
 
-        bh = sb_bread(sb, i_pos >> sbi->dir_per_block_bits);
+        fat_get_blknr_offset(sbi, i_pos, &blocknr, &offset);
+        bh = sb_bread(sb, blocknr);
         if (!bh) {
                 fat_msg(sb, KERN_ERR, "unable to read inode block "
                        "for updating (i_pos %lld)", i_pos);
@@ -685,8 +687,7 @@ retry:
                 goto retry;
         }
 
-        raw_entry = &((struct msdos_dir_entry *) (bh->b_data))
-            [i_pos & (sbi->dir_per_block - 1)];
+        raw_entry = &((struct msdos_dir_entry *) (bh->b_data))[offset];
         if (S_ISDIR(inode->i_mode))
                 raw_entry->size = 0;
         else