ext4: Simplify error handling in ext4_dax_huge_fault()

If transaction starting fails, just bail out of the function immediately instead of checking for that condition throughout the function. Reviewed-by: Ross Zwisler <[email protected]> Signed-off-by: Jan Kara <[email protected]> Signed-off-by: Dan Williams <[email protected]>
kyagi · Nov 3, 2017 · 497f692 · 497f692
1 parent 71eab6d
commit 497f692
Showing 1 changed file with 7 additions and 6 deletions.
diff --git a/fs/ext4/file.c b/fs/ext4/file.c
@@ -302,16 +302,17 @@ static int ext4_dax_huge_fault(struct vm_fault *vmf,
 		down_read(&EXT4_I(inode)->i_mmap_sem);
 		handle = ext4_journal_start_sb(sb, EXT4_HT_WRITE_PAGE,
 					       EXT4_DATA_TRANS_BLOCKS(sb));
+		if (IS_ERR(handle)) {
+			up_read(&EXT4_I(inode)->i_mmap_sem);
+			sb_end_pagefault(sb);
+			return VM_FAULT_SIGBUS;
+		}
 	} else {
 		down_read(&EXT4_I(inode)->i_mmap_sem);
 	}
-	if (!IS_ERR(handle))
-		result = dax_iomap_fault(vmf, pe_size, NULL, &ext4_iomap_ops);
-	else
-		result = VM_FAULT_SIGBUS;
+	result = dax_iomap_fault(vmf, pe_size, NULL, &ext4_iomap_ops);
 	if (write) {
-		if (!IS_ERR(handle))
-			ext4_journal_stop(handle);
+		ext4_journal_stop(handle);
 		up_read(&EXT4_I(inode)->i_mmap_sem);
 		sb_end_pagefault(sb);
 	} else {