1 files changed, 10 insertions, 9 deletions

diff --git a/fs/ext4/migrate.c b/fs/ext4/migrate.c
index f2a9cf498ecd..734abca25e35 100644
--- a/fs/ext4/migrate.c
+++ b/fs/ext4/migrate.c
@@ -59,7 +59,8 @@ static int finish_range(handle_t *handle, struct inode *inode,
         /*
          * Make sure the credit we accumalated is not really high
          */
-        if (needed && handle->h_buffer_credits >= EXT4_RESERVE_TRANS_BLOCKS) {
+        if (needed && ext4_handle_has_enough_credits(handle,
+                                                EXT4_RESERVE_TRANS_BLOCKS)) {
                 retval = ext4_journal_restart(handle, needed);
                 if (retval)
                         goto err_out;
@@ -229,7 +230,7 @@ static int extend_credit_for_blkdel(handle_t *handle, struct inode *inode)
 {
         int retval = 0, needed;
 
-        if (handle->h_buffer_credits > EXT4_RESERVE_TRANS_BLOCKS)
+        if (ext4_handle_has_enough_credits(handle, EXT4_RESERVE_TRANS_BLOCKS+1))
                 return 0;
         /*
          * We are freeing a blocks. During this we touch
@@ -458,13 +459,13 @@ int ext4_ext_migrate(struct inode *inode)
         struct list_blocks_struct lb;
         unsigned long max_entries;
 
-        if (!test_opt(inode->i_sb, EXTENTS))
-                /*
-                 * if mounted with noextents we don't allow the migrate
-                 */
-                return -EINVAL;
-
-        if ((EXT4_I(inode)->i_flags & EXT4_EXTENTS_FL))
+        /*
+         * If the filesystem does not support extents, or the inode
+         * already is extent-based, error out.
+         */
+        if (!EXT4_HAS_INCOMPAT_FEATURE(inode->i_sb,
+                                       EXT4_FEATURE_INCOMPAT_EXTENTS) ||
+            (EXT4_I(inode)->i_flags & EXT4_EXTENTS_FL))
                 return -EINVAL;
 
         if (S_ISLNK(inode->i_mode) && inode->i_blocks == 0)