Merge tag 'mfd-for-linus-3.8-1' of git://git.kernel.org/pub/scm/linux/kernel/git...

[firefly-linux-kernel-4.4.55.git] / fs / btrfs / ioctl.c

diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index fcf1b1b400823de809da09827ddc4c42a645b5eb..5b22d45d3c6a232aeed49b24cf34bb374a96ecc9 100644 (file)
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -1243,7 +1243,7 @@ int btrfs_defrag_file(struct inode *inode, struct file *file,
                }
 
                defrag_count += ret;
-               balance_dirty_pages_ratelimited_nr(inode->i_mapping, ret);
+               balance_dirty_pages_ratelimited(inode->i_mapping);
                mutex_unlock(&inode->i_mutex);
 
                if (newer_than) {
@@ -2186,19 +2186,20 @@ static int btrfs_ioctl_defrag(struct file *file, void __user *argp)
        struct btrfs_ioctl_defrag_range_args *range;
        int ret;
 
-       if (btrfs_root_readonly(root))
-               return -EROFS;
+       ret = mnt_want_write_file(file);
+       if (ret)
+               return ret;
 
        if (atomic_xchg(&root->fs_info->mutually_exclusive_operation_running,
                        1)) {
                pr_info("btrfs: dev add/delete/balance/replace/resize operation in progress\n");
+               mnt_drop_write_file(file);
                return -EINVAL;
        }
-       ret = mnt_want_write_file(file);
-       if (ret) {
-               atomic_set(&root->fs_info->mutually_exclusive_operation_running,
-                          0);
-               return ret;
+
+       if (btrfs_root_readonly(root)) {
+               ret = -EROFS;
+               goto out;
        }
 
        switch (inode->i_mode & S_IFMT) {
@@ -2250,8 +2251,8 @@ static int btrfs_ioctl_defrag(struct file *file, void __user *argp)
                ret = -EINVAL;
        }
 out:
-       mnt_drop_write_file(file);
        atomic_set(&root->fs_info->mutually_exclusive_operation_running, 0);
+       mnt_drop_write_file(file);
        return ret;
 }
 
@@ -2319,8 +2320,8 @@ static long btrfs_ioctl_rm_dev(struct file *file, void __user *arg)
        kfree(vol_args);
 out:
        mutex_unlock(&root->fs_info->volume_mutex);
-       mnt_drop_write_file(file);
        atomic_set(&root->fs_info->mutually_exclusive_operation_running, 0);
+       mnt_drop_write_file(file);
        return ret;
 }