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From: Guenter Roeck <linux@roeck-us.net>
To: Dan Carpenter <dan.carpenter@oracle.com>
Cc: Larry Finger <Larry.Finger@lwfinger.net>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Ivan Safonov <insafonov@gmail.com>,
	Michael Straube <straube.linux@gmail.com>,
	Christophe JAILLET <christophe.jaillet@wanadoo.fr>,
	Peilin Ye <yepeilin.cs@gmail.com>,
	linux-staging@lists.linux.dev, kernel-janitors@vger.kernel.org
Subject: Re: [PATCH 2/7] staging: rtl8188eu: use safe iterator in tx_beacon_hdl()
Date: Wed, 9 Jun 2021 03:34:43 -0700	[thread overview]
Message-ID: <20210609103443.GB3727184@roeck-us.net> (raw)
In-Reply-To: <YL5iunD5ilf+mKPR@mwanda>

On Mon, Jun 07, 2021 at 09:17:30PM +0300, Dan Carpenter wrote:
> This loop calls list_del_init() on the list iterator so it has to use
> the _safe() iterator or it leads to an endless loop.
> 
> Fixes: 23017c8842d2 ("staging: rtl8188eu: Use list iterators and helpers")
> Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>

Reviewed-by: Guenter Roeck <linux@roeck-us.net>

> ---
>  drivers/staging/rtl8188eu/core/rtw_mlme_ext.c | 11 ++++-------
>  1 file changed, 4 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/staging/rtl8188eu/core/rtw_mlme_ext.c b/drivers/staging/rtl8188eu/core/rtw_mlme_ext.c
> index b4d81d3a856c..42cfa1e95e2c 100644
> --- a/drivers/staging/rtl8188eu/core/rtw_mlme_ext.c
> +++ b/drivers/staging/rtl8188eu/core/rtw_mlme_ext.c
> @@ -5378,8 +5378,8 @@ u8 tx_beacon_hdl(struct adapter *padapter, unsigned char *pbuf)
>  #ifdef CONFIG_88EU_AP_MODE
>  	else { /* tx bc/mc frames after update TIM */
>  		struct sta_info *psta_bmc;
> -		struct list_head *xmitframe_plist, *xmitframe_phead;
> -		struct xmit_frame *pxmitframe = NULL;
> +		struct list_head *xmitframe_phead;
> +		struct xmit_frame *pxmitframe, *n;
>  		struct sta_priv *pstapriv = &padapter->stapriv;
>  
>  		/* for BC/MC Frames */
> @@ -5392,11 +5392,8 @@ u8 tx_beacon_hdl(struct adapter *padapter, unsigned char *pbuf)
>  			spin_lock_bh(&psta_bmc->sleep_q.lock);
>  
>  			xmitframe_phead = get_list_head(&psta_bmc->sleep_q);
> -			list_for_each(xmitframe_plist, xmitframe_phead) {
> -				pxmitframe = list_entry(xmitframe_plist,
> -							struct xmit_frame,
> -							list);
> -
> +			list_for_each_entry_safe(pxmitframe, n, xmitframe_phead,
> +						 list) {
>  				list_del_init(&pxmitframe->list);
>  
>  				psta_bmc->sleepq_len--;
> -- 
> 2.30.2
> 

  reply	other threads:[~2021-06-09 10:34 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-07 18:15 [PATCH 0/7] staging: rtl8188eu: use safe version of list iterators Dan Carpenter
2021-06-07 18:17 ` [PATCH 1/7] staging: rtl8188eu: use safe iterator in stop_ap_mode() Dan Carpenter
2021-06-09 10:33   ` Guenter Roeck
2021-06-07 18:17 ` [PATCH 2/7] staging: rtl8188eu: use safe iterator in tx_beacon_hdl() Dan Carpenter
2021-06-09 10:34   ` Guenter Roeck [this message]
2021-06-07 18:17 ` [PATCH 3/7] staging: rtl8188eu: use safe iterator in dequeue_xmitframes_to_sleeping_queue() Dan Carpenter
2021-06-09 10:35   ` Guenter Roeck
2021-06-07 18:17 ` [PATCH 4/7] staging: rtl8188eu: use safe iterator in wakeup_sta_to_xmit() Dan Carpenter
2021-06-09 10:36   ` Guenter Roeck
2021-06-07 18:18 ` [PATCH 5/7] staging: rtl8188eu: use safe iterator in xmit_delivery_enabled_frames() Dan Carpenter
2021-06-09 10:37   ` Guenter Roeck
2021-06-07 18:18 ` [PATCH 6/7] staging: rtl8188eu: use safe iterator in rtl8188eu_xmitframe_complete() Dan Carpenter
2021-06-09 10:37   ` Guenter Roeck
2021-06-07 18:19 ` [PATCH 7/7] staging: rtl8188eu: delete some dead code Dan Carpenter
2021-06-09 10:39   ` Guenter Roeck

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