From: David Sterba <dsterba@xxxxxxx>
Move the op exclusivity check before the other code (same as in
ADD_DEV).
Signed-off-by: David Sterba <dsterba@xxxxxxxx>
---
fs/btrfs/ioctl.c | 23 +++++++++++------------
1 file changed, 11 insertions(+), 12 deletions(-)
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index 5a23806ae418..70e9687f1d59 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -2680,32 +2680,31 @@ static long btrfs_ioctl_rm_dev(struct file *file, void __user *arg)
if (ret)
return ret;
- vol_args = memdup_user(arg, sizeof(*vol_args));
- if (IS_ERR(vol_args)) {
- ret = PTR_ERR(vol_args);
- goto err_drop;
- }
-
- vol_args->name[BTRFS_PATH_NAME_MAX] = '\0';
-
if (atomic_xchg(&root->fs_info->mutually_exclusive_operation_running,
1)) {
ret = BTRFS_ERROR_DEV_EXCL_RUN_IN_PROGRESS;
+ goto out_drop_write;
+ }
+
+ vol_args = memdup_user(arg, sizeof(*vol_args));
+ if (IS_ERR(vol_args)) {
+ ret = PTR_ERR(vol_args);
goto out;
}
+ vol_args->name[BTRFS_PATH_NAME_MAX] = '\0';
mutex_lock(&root->fs_info->volume_mutex);
ret = btrfs_rm_device(root, vol_args->name);
mutex_unlock(&root->fs_info->volume_mutex);
- atomic_set(&root->fs_info->mutually_exclusive_operation_running, 0);
if (!ret)
btrfs_info(root->fs_info, "disk deleted %s",vol_args->name);
-
-out:
kfree(vol_args);
-err_drop:
+out:
+ atomic_set(&root->fs_info->mutually_exclusive_operation_running, 0);
+out_drop_write:
mnt_drop_write_file(file);
+
return ret;
}
--
2.7.1
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