linux-kernel - Re: [PATCH 2/4] Staging: rtl8188eu: core: rtw_ap: Use list_for_each_entry

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Date:   Thu, 19 Oct 2017 11:17:18 +0300
From:   Dan Carpenter <dan.carpenter@...cle.com>
To:     Srishti Sharma <srishtishar@...il.com>
Cc:     gregkh@...uxfoundation.org, devel@...verdev.osuosl.org,
        outreachy-kernel@...glegroups.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/4] Staging: rtl8188eu: core: rtw_ap: Use
 list_for_each_entry_safe

On Thu, Oct 19, 2017 at 01:01:14AM +0530, Srishti Sharma wrote:
> This is a cleanup patch and doesn't change runtime behaviour. It
> changes an open coded list traversal to use list_for_each_entry_safe.
> Done using the following semantic patch by coccinelle.
> 
> @r@
> struct list_head* l;
> expression e;
> identifier m,list_del_init,f;
> type T1;
> T1* pos;
> iterator name list_for_each_entry_safe;
> @@
> 
> f(...){
> 
> +T1* tmp;
> <+...
> -while(...)
> +list_for_each_entry_safe(pos,tmp,l,m)
> {
> ...
> -pos = container_of(l,T1,m);
> ...
> -l=e;
>  <+...
>  list_del_init(&pos->m)
>  ...+>
> }
> ...+>
> 
> }
> 
> Signed-off-by: Srishti Sharma <srishtishar@...il.com>
> ---
>  drivers/staging/rtl8188eu/core/rtw_ap.c | 34 +++++++++------------------------
>  1 file changed, 9 insertions(+), 25 deletions(-)
> 
> diff --git a/drivers/staging/rtl8188eu/core/rtw_ap.c b/drivers/staging/rtl8188eu/core/rtw_ap.c
> index 32a4837..551af9e 100644
> --- a/drivers/staging/rtl8188eu/core/rtw_ap.c
> +++ b/drivers/staging/rtl8188eu/core/rtw_ap.c
> @@ -280,7 +280,7 @@ void	expire_timeout_chk(struct adapter *padapter)
>  {
>  	struct list_head *phead, *plist;
>  	u8 updated = 0;
> -	struct sta_info *psta = NULL;
> +	struct sta_info *psta = NULL, *tmp;
>  	struct sta_priv *pstapriv = &padapter->stapriv;
>  	u8 chk_alive_num = 0;
>  	char chk_alive_list[NUM_STA];
> @@ -292,10 +292,7 @@ void	expire_timeout_chk(struct adapter *padapter)
>  	plist = phead->next;
>  
>  	/* check auth_queue */
> -	while (phead != plist) {
> -		psta = container_of(plist, struct sta_info, auth_list);
> -		plist = plist->next;
> -
> +	list_for_each_entry_safe(psta, tmp, plist, auth_list) {


This one as well.  (I'm reviewing in reverse order)  We don't need
plist, just phead.

regards,
dan carpenter