linux-kernel - Re: [PATCH v2] btrfs: add a check for sysfs_create

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Message-ID: <a840f129-9626-9b96-be2c-173b3e9371fe@gmx.com>
Date:   Wed, 26 Dec 2018 13:51:16 +0800
From:   Su Yue <Damenly_Su@....com>
To:     Kangjie Lu <kjlu@....edu>
Cc:     pakki001@....edu, Chris Mason <clm@...com>,
        Josef Bacik <josef@...icpanda.com>,
        David Sterba <dsterba@...e.com>, linux-btrfs@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] btrfs: add a check for sysfs_create_group



On 12/26/18 1:37 PM, Kangjie Lu wrote:
> In case sysfs_create_group fails, let's check its return value and
> issues an error message.
> 
> Signed-off-by: Kangjie Lu <kjlu@....edu>
> ---
>   fs/btrfs/sysfs.c | 2 ++
>   1 file changed, 2 insertions(+)
> 
> diff --git a/fs/btrfs/sysfs.c b/fs/btrfs/sysfs.c
> index 3717c864ba23..24ef416e700b 100644
> --- a/fs/btrfs/sysfs.c
> +++ b/fs/btrfs/sysfs.c
> @@ -889,6 +889,8 @@ void btrfs_sysfs_feature_update(struct btrfs_fs_info *fs_info,
>   	 */
>   	sysfs_remove_group(fsid_kobj, &btrfs_feature_attr_group);
>   	ret = sysfs_create_group(fsid_kobj, &btrfs_feature_attr_group);
> +	if (ret)
> +		btrfs_err(fs_info, "failed to create btrfs_feature_attr_group.\n");

NIT: ".\n" is unnecessary.

---
Su
>   }
>   
>   static int btrfs_init_debugfs(void)
>