linux-kernel - RE: [PATCH] xen-netback: remove unecessary condition check before debugfs_remove

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Date:   Tue, 11 Sep 2018 08:00:02 +0000
From:   Paul Durrant <Paul.Durrant@...rix.com>
To:     'zhong jiang' <zhongjiang@...wei.com>,
        "davem@...emloft.net" <davem@...emloft.net>,
        Wei Liu <wei.liu2@...rix.com>
CC:     "xen-devel@...ts.xenproject.org" <xen-devel@...ts.xenproject.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH] xen-netback: remove unecessary condition check before
 debugfs_remove_recursive

> -----Original Message-----
> From: zhong jiang [mailto:zhongjiang@...wei.com]
> Sent: 08 September 2018 14:54
> To: davem@...emloft.net; Paul Durrant <Paul.Durrant@...rix.com>; Wei Liu
> <wei.liu2@...rix.com>
> Cc: xen-devel@...ts.xenproject.org; netdev@...r.kernel.org; linux-
> kernel@...r.kernel.org
> Subject: [PATCH] xen-netback: remove unecessary condition check before
> debugfs_remove_recursive
> 
> debugfs_remove_recursive has taken IS_ERR_OR_NULL into account. So just
> remove the condition check before debugfs_remove_recursive.
> 
> Signed-off-by: zhong jiang <zhongjiang@...wei.com>

Reviewed-by: Paul Durrant <paul.durrant@...rix.com>

> ---
>  drivers/net/xen-netback/netback.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/drivers/net/xen-netback/netback.c b/drivers/net/xen-
> netback/netback.c
> index 3621e05..80aae3a 100644
> --- a/drivers/net/xen-netback/netback.c
> +++ b/drivers/net/xen-netback/netback.c
> @@ -1660,8 +1660,7 @@ static int __init netback_init(void)
>  static void __exit netback_fini(void)
>  {
>  #ifdef CONFIG_DEBUG_FS
> -	if (!IS_ERR_OR_NULL(xen_netback_dbg_root))
> -		debugfs_remove_recursive(xen_netback_dbg_root);
> +	debugfs_remove_recursive(xen_netback_dbg_root);
>  #endif /* CONFIG_DEBUG_FS */
>  	xenvif_xenbus_fini();
>  }
> --
> 1.7.12.4