linux-kernel - [PATCH 3/4] Staging: rtl8188eu: core: rtw_mlme_ext: Use list_for_each_entry

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Date:   Thu, 19 Oct 2017 01:01:39 +0530
From:   Srishti Sharma <srishtishar@...il.com>
To:     gregkh@...uxfoundation.org
Cc:     devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org,
        outreachy-kernel@...glegroups.com,
        Srishti Sharma <srishtishar@...il.com>
Subject: [PATCH 3/4] Staging: rtl8188eu: core: rtw_mlme_ext: Use list_for_each_entry_safe

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_mlme_ext.c | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/drivers/staging/rtl8188eu/core/rtw_mlme_ext.c b/drivers/staging/rtl8188eu/core/rtw_mlme_ext.c
index 685c071..cf85fb4 100644
--- a/drivers/staging/rtl8188eu/core/rtw_mlme_ext.c
+++ b/drivers/staging/rtl8188eu/core/rtw_mlme_ext.c
@@ -5463,6 +5463,8 @@ u8 mlme_evt_hdl(struct adapter *padapter, unsigned char *pbuf)
 
 u8 tx_beacon_hdl(struct adapter *padapter, unsigned char *pbuf)
 {
+	struct xmit_frame *tmp;
+
 	if (send_beacon(padapter) == _FAIL) {
 		DBG_88E("issue_beacon, fail!\n");
 		return H2C_PARAMETERS_ERROR;
@@ -5486,11 +5488,8 @@ u8 tx_beacon_hdl(struct adapter *padapter, unsigned char *pbuf)
 			xmitframe_phead = get_list_head(&psta_bmc->sleep_q);
 			xmitframe_plist = xmitframe_phead->next;
 
-			while (xmitframe_phead != xmitframe_plist) {
-				pxmitframe = container_of(xmitframe_plist, struct xmit_frame, list);
-
-				xmitframe_plist = xmitframe_plist->next;
-
+			list_for_each_entry_safe(pxmitframe, tmp,
+						 xmitframe_plist, list) {
 				list_del_init(&pxmitframe->list);
 
 				psta_bmc->sleepq_len--;
-- 
2.7.4