ext4: clean up error handling in swap_inode_boot_loader()

Tighten up the code to make the code easier to read and maintain.

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>

diff --git a/fs/ext4/ioctl.c b/fs/ext4/ioctl.c
index a2a837f..0f2252e 100644 (file)
--- a/fs/ext4/ioctl.c
+++ b/fs/ext4/ioctl.c
@@ -104,21 +104,15 @@ static long swap_inode_boot_loader(struct super_block *sb,
        struct ext4_inode_info *ei_bl;
        struct ext4_sb_info *sbi = EXT4_SB(sb);
 
-       if (inode->i_nlink != 1 || !S_ISREG(inode->i_mode)) {
-               err = -EINVAL;
-               goto swap_boot_out;
-       }
+       if (inode->i_nlink != 1 || !S_ISREG(inode->i_mode))
+               return -EINVAL;
 
-       if (!inode_owner_or_capable(inode) || !capable(CAP_SYS_ADMIN)) {
-               err = -EPERM;
-               goto swap_boot_out;
-       }
+       if (!inode_owner_or_capable(inode) || !capable(CAP_SYS_ADMIN))
+               return -EPERM;
 
        inode_bl = ext4_iget(sb, EXT4_BOOT_LOADER_INO);
-       if (IS_ERR(inode_bl)) {
-               err = PTR_ERR(inode_bl);
-               goto swap_boot_out;
-       }
+       if (IS_ERR(inode_bl))
+               return PTR_ERR(inode_bl);
        ei_bl = EXT4_I(inode_bl);
 
        filemap_flush(inode->i_mapping);
@@ -193,20 +187,14 @@ static long swap_inode_boot_loader(struct super_block *sb,
                        ext4_mark_inode_dirty(handle, inode);
                }
        }
-
        ext4_journal_stop(handle);
-
        ext4_double_up_write_data_sem(inode, inode_bl);
 
 journal_err_out:
        ext4_inode_resume_unlocked_dio(inode);
        ext4_inode_resume_unlocked_dio(inode_bl);
-
        unlock_two_nondirectories(inode, inode_bl);
-
        iput(inode_bl);
-
-swap_boot_out:
        return err;
 }