Re: [PATCH v2] btrfs: normalize the error handling branch in btrfs_init_sysfs()

[Qu Wenruo]

On 2022/11/22 19:50, Zhen Lei wrote:
> Although kset_unregister() can eventually remove all attribute files,
> explicitly rolling back with the matching function makes the code logic
> look clearer.
>
> Signed-off-by: Zhen Lei <thunder.leizhen@xxxxxxxxxx>

Reviewed-by: Qu Wenruo <wqu@xxxxxxxx>

Thanks,
Qu

> ---
>   fs/btrfs/sysfs.c | 7 +++++--
>   1 file changed, 5 insertions(+), 2 deletions(-)
>
> v1 --> v2:
> 1. Add sysfs_unmerge_group() to unmerge group first.
> 2. Update subject and commit message, no resource leaks.
>
> diff --git a/fs/btrfs/sysfs.c b/fs/btrfs/sysfs.c
> index 699b54b3acaae0b..74fef1f49c358cd 100644
> --- a/fs/btrfs/sysfs.c
> +++ b/fs/btrfs/sysfs.c
> @@ -2321,8 +2321,11 @@ int __init btrfs_init_sysfs(void)
>   
>   #ifdef CONFIG_BTRFS_DEBUG
>   	ret = sysfs_create_group(&btrfs_kset->kobj, &btrfs_debug_feature_attr_group);
> -	if (ret)
> -		goto out2;
> +	if (ret) {
> +		sysfs_unmerge_group(&btrfs_kset->kobj,
> +				    &btrfs_static_feature_attr_group);
> +		goto out_remove_group;
> +	}
>   #endif
>   
>   	return 0;