[PATCH 0/4] Code cleanup

[PATCH 0/4] Code cleanup

[Srishti Sharma]

This patch series performs code cleanup like using list_for_each_entry_safe
to make code more compact and using list_entry instead of container_of for 
struct list_head* variable types. 

Srishti Sharma (4):
  Staging: rtl8188eu: core: rtw_xmit: Use list_for_each_entry_safe
  Staging: rtl8188eu: core: rtw_ap: Use list_for_each_entry_safe
  Staging: rtl8188eu: core: rtw_mlme_ext: Use list_for_each_entry_safe
  Staging: rtl8188eu: core: Use list_entry instead of container_of

 drivers/staging/rtl8188eu/core/rtw_ap.c       | 38 ++++++++-------------------
 drivers/staging/rtl8188eu/core/rtw_mlme.c     |  8 +++---
 drivers/staging/rtl8188eu/core/rtw_mlme_ext.c | 11 ++++----
 drivers/staging/rtl8188eu/core/rtw_sta_mgt.c  | 12 ++++-----
 drivers/staging/rtl8188eu/core/rtw_xmit.c     | 30 +++++++--------------
 5 files changed, 36 insertions(+), 63 deletions(-)

-- 
2.7.4

[PATCH 1/4] Staging: rtl8188eu: core: rtw_xmit: Use list_for_each_entry_safe

[Srishti Sharma]

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@gmail.com>
---
 drivers/staging/rtl8188eu/core/rtw_xmit.c | 22 ++++++----------------
 1 file changed, 6 insertions(+), 16 deletions(-)

diff --git a/drivers/staging/rtl8188eu/core/rtw_xmit.c b/drivers/staging/rtl8188eu/core/rtw_xmit.c
index e8d9858..5255c27 100644
--- a/drivers/staging/rtl8188eu/core/rtw_xmit.c
+++ b/drivers/staging/rtl8188eu/core/rtw_xmit.c
@@ -1866,6 +1866,7 @@ void stop_sta_xmit(struct adapter *padapter, struct sta_info *psta)
 
 void wakeup_sta_to_xmit(struct adapter *padapter, struct sta_info *psta)
 {
+	struct xmit_frame *tmp;
 	u8 update_mask = 0, wmmps_ac = 0;
 	struct sta_info *psta_bmc;
 	struct list_head *xmitframe_plist, *xmitframe_phead;
@@ -1877,11 +1878,7 @@ void wakeup_sta_to_xmit(struct adapter *padapter, struct sta_info *psta)
 	xmitframe_phead = get_list_head(&psta->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);
 
 		switch (pxmitframe->attrib.priority) {
@@ -1958,11 +1955,8 @@ void wakeup_sta_to_xmit(struct adapter *padapter, struct sta_info *psta)
 		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--;
@@ -1997,7 +1991,7 @@ void xmit_delivery_enabled_frames(struct adapter *padapter, struct sta_info *pst
 {
 	u8 wmmps_ac = 0;
 	struct list_head *xmitframe_plist, *xmitframe_phead;
-	struct xmit_frame *pxmitframe = NULL;
+	struct xmit_frame *pxmitframe = NULL, *tmp;
 	struct sta_priv *pstapriv = &padapter->stapriv;
 
 	spin_lock_bh(&psta->sleep_q.lock);
@@ -2005,11 +1999,7 @@ void xmit_delivery_enabled_frames(struct adapter *padapter, struct sta_info *pst
 	xmitframe_phead = get_list_head(&psta->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) {
 		switch (pxmitframe->attrib.priority) {
 		case 1:
 		case 2:
-- 
2.7.4

[PATCH 2/4] Staging: rtl8188eu: core: rtw_ap: Use list_for_each_entry_safe

[Srishti Sharma]

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@gmail.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) {
 		if (psta->expire_to > 0) {
 			psta->expire_to--;
 			if (psta->expire_to == 0) {
@@ -326,10 +323,7 @@ void	expire_timeout_chk(struct adapter *padapter)
 	plist = phead->next;
 
 	/* check asoc_queue */
-	while (phead != plist) {
-		psta = container_of(plist, struct sta_info, asoc_list);
-		plist = plist->next;
-
+	list_for_each_entry_safe(psta, tmp, plist, asoc_list) {
 		if (chk_sta_is_alive(psta) || !psta->expire_to) {
 			psta->expire_to = pstapriv->expire_to;
 			psta->keep_alive_trycnt = 0;
@@ -1196,7 +1190,7 @@ int rtw_acl_add_sta(struct adapter *padapter, u8 *addr)
 int rtw_acl_remove_sta(struct adapter *padapter, u8 *addr)
 {
 	struct list_head *plist, *phead;
-	struct rtw_wlan_acl_node *paclnode;
+	struct rtw_wlan_acl_node *paclnode, *tmp;
 	struct sta_priv *pstapriv = &padapter->stapriv;
 	struct wlan_acl_pool *pacl_list = &pstapriv->acl_list;
 	struct __queue *pacl_node_q = &pacl_list->acl_node_q;
@@ -1208,10 +1202,7 @@ int rtw_acl_remove_sta(struct adapter *padapter, u8 *addr)
 	phead = get_list_head(pacl_node_q);
 	plist = phead->next;
 
-	while (phead != plist) {
-		paclnode = container_of(plist, struct rtw_wlan_acl_node, list);
-		plist = plist->next;
-
+	list_for_each_entry_safe(paclnode, tmp, plist, list) {
 		if (!memcmp(paclnode->addr, addr, ETH_ALEN)) {
 			if (paclnode->valid) {
 				paclnode->valid = false;
@@ -1711,7 +1702,7 @@ u8 ap_free_sta(struct adapter *padapter, struct sta_info *psta,
 int rtw_sta_flush(struct adapter *padapter)
 {
 	struct list_head *phead, *plist;
-	struct sta_info *psta = NULL;
+	struct sta_info *psta = NULL, *tmp;
 	struct sta_priv *pstapriv = &padapter->stapriv;
 	struct mlme_ext_priv *pmlmeext = &padapter->mlmeextpriv;
 	struct mlme_ext_info	*pmlmeinfo = &pmlmeext->mlmext_info;
@@ -1727,11 +1718,7 @@ int rtw_sta_flush(struct adapter *padapter)
 	plist = phead->next;
 
 	/* free sta asoc_queue */
-	while (phead != plist) {
-		psta = container_of(plist, struct sta_info, asoc_list);
-
-		plist = plist->next;
-
+	list_for_each_entry_safe(psta, tmp, plist, asoc_list) {
 		list_del_init(&psta->asoc_list);
 		pstapriv->asoc_list_cnt--;
 
@@ -1833,7 +1820,7 @@ void start_ap_mode(struct adapter *padapter)
 void stop_ap_mode(struct adapter *padapter)
 {
 	struct list_head *phead, *plist;
-	struct rtw_wlan_acl_node *paclnode;
+	struct rtw_wlan_acl_node *paclnode, *tmp;
 	struct sta_info *psta = NULL;
 	struct sta_priv *pstapriv = &padapter->stapriv;
 	struct mlme_priv *pmlmepriv = &padapter->mlmepriv;
@@ -1855,10 +1842,7 @@ void stop_ap_mode(struct adapter *padapter)
 	spin_lock_bh(&pacl_node_q->lock);
 	phead = get_list_head(pacl_node_q);
 	plist = phead->next;
-	while (phead != plist) {
-		paclnode = container_of(plist, struct rtw_wlan_acl_node, list);
-		plist = plist->next;
-
+	list_for_each_entry_safe(paclnode, tmp, plist, list) {
 		if (paclnode->valid) {
 			paclnode->valid = false;
 
-- 
2.7.4

[PATCH 3/4] Staging: rtl8188eu: core: rtw_mlme_ext: Use list_for_each_entry_safe

[Srishti Sharma]

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@gmail.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

[PATCH 4/4] Staging: rtl8188eu: core: Use list_entry instead of container_of

[Srishti Sharma]

For variables of the struct list_head* use list_entry to access
current list element instead of using container_of.
Done using the following semantic patch by coccinelle.

@r@
struct list_head* l;
@@

-container_of
+list_entry
   (l,...)

Signed-off-by: Srishti Sharma <srishtishar@gmail.com>
---
 drivers/staging/rtl8188eu/core/rtw_ap.c       |  4 ++--
 drivers/staging/rtl8188eu/core/rtw_mlme.c     |  8 ++++----
 drivers/staging/rtl8188eu/core/rtw_mlme_ext.c |  2 +-
 drivers/staging/rtl8188eu/core/rtw_sta_mgt.c  | 12 ++++++------
 drivers/staging/rtl8188eu/core/rtw_xmit.c     |  8 ++++----
 5 files changed, 17 insertions(+), 17 deletions(-)

diff --git a/drivers/staging/rtl8188eu/core/rtw_ap.c b/drivers/staging/rtl8188eu/core/rtw_ap.c
index 551af9e..c968472 100644
--- a/drivers/staging/rtl8188eu/core/rtw_ap.c
+++ b/drivers/staging/rtl8188eu/core/rtw_ap.c
@@ -1143,7 +1143,7 @@ int rtw_acl_add_sta(struct adapter *padapter, u8 *addr)
 	plist = phead->next;
 
 	while (phead != plist) {
-		paclnode = container_of(plist, struct rtw_wlan_acl_node, list);
+		paclnode = list_entry(plist, struct rtw_wlan_acl_node, list);
 		plist = plist->next;
 
 		if (!memcmp(paclnode->addr, addr, ETH_ALEN)) {
@@ -1447,7 +1447,7 @@ void associated_clients_update(struct adapter *padapter, u8 updated)
 
 		/* check asoc_queue */
 		while (phead != plist) {
-			psta = container_of(plist, struct sta_info, asoc_list);
+			psta = list_entry(plist, struct sta_info, asoc_list);
 
 			plist = plist->next;
 
diff --git a/drivers/staging/rtl8188eu/core/rtw_mlme.c b/drivers/staging/rtl8188eu/core/rtw_mlme.c
index b15cf17..82f25b6 100644
--- a/drivers/staging/rtl8188eu/core/rtw_mlme.c
+++ b/drivers/staging/rtl8188eu/core/rtw_mlme.c
@@ -198,7 +198,7 @@ struct wlan_network *rtw_find_network(struct __queue *scanned_queue, u8 *addr)
 	plist = phead->next;
 
 	while (plist != phead) {
-		pnetwork = container_of(plist, struct wlan_network, list);
+		pnetwork = list_entry(plist, struct wlan_network, list);
 		if (!memcmp(addr, pnetwork->network.MacAddress, ETH_ALEN))
 			break;
 		plist = plist->next;
@@ -223,7 +223,7 @@ void rtw_free_network_queue(struct adapter *padapter, u8 isfreeall)
 	plist = phead->next;
 
 	while (phead != plist) {
-		pnetwork = container_of(plist, struct wlan_network, list);
+		pnetwork = list_entry(plist, struct wlan_network, list);
 
 		plist = plist->next;
 
@@ -342,7 +342,7 @@ struct	wlan_network	*rtw_get_oldest_wlan_network(struct __queue *scanned_queue)
 	phead = get_list_head(scanned_queue);
 
 	for (plist = phead->next; plist != phead; plist = plist->next) {
-		pwlan = container_of(plist, struct wlan_network, list);
+		pwlan = list_entry(plist, struct wlan_network, list);
 
 		if (!pwlan->fixed) {
 			if (!oldest || time_after(oldest->last_scanned, pwlan->last_scanned))
@@ -421,7 +421,7 @@ void rtw_update_scanned_network(struct adapter *adapter, struct wlan_bssid_ex *t
 	plist = phead->next;
 
 	while (phead != plist) {
-		pnetwork	= container_of(plist, struct wlan_network, list);
+		pnetwork	= list_entry(plist, struct wlan_network, list);
 
 		if (is_same_network(&(pnetwork->network), target))
 			break;
diff --git a/drivers/staging/rtl8188eu/core/rtw_mlme_ext.c b/drivers/staging/rtl8188eu/core/rtw_mlme_ext.c
index cf85fb4..5b38f63 100644
--- a/drivers/staging/rtl8188eu/core/rtw_mlme_ext.c
+++ b/drivers/staging/rtl8188eu/core/rtw_mlme_ext.c
@@ -1798,7 +1798,7 @@ static void issue_action_BSSCoexistPacket(struct adapter *padapter)
 			u8 *p;
 			struct wlan_bssid_ex *pbss_network;
 
-			pnetwork = container_of(plist, struct wlan_network, list);
+			pnetwork = list_entry(plist, struct wlan_network, list);
 
 			plist = plist->next;
 
diff --git a/drivers/staging/rtl8188eu/core/rtw_sta_mgt.c b/drivers/staging/rtl8188eu/core/rtw_sta_mgt.c
index 2fd2a9e..aab2895 100644
--- a/drivers/staging/rtl8188eu/core/rtw_sta_mgt.c
+++ b/drivers/staging/rtl8188eu/core/rtw_sta_mgt.c
@@ -152,8 +152,8 @@ u32	_rtw_free_sta_priv(struct	sta_priv *pstapriv)
 			while (phead != plist) {
 				int i;
 
-				psta = container_of(plist, struct sta_info,
-						    hash_list);
+				psta = list_entry(plist, struct sta_info,
+						  hash_list);
 				plist = plist->next;
 
 				for (i = 0; i < 16; i++) {
@@ -323,7 +323,7 @@ u32	rtw_free_stainfo(struct adapter *padapter, struct sta_info *psta)
 		plist = phead->next;
 
 		while (!list_empty(phead)) {
-			prframe = container_of(plist, struct recv_frame, list);
+			prframe = list_entry(plist, struct recv_frame, list);
 
 			plist = plist->next;
 
@@ -399,7 +399,7 @@ void rtw_free_all_stainfo(struct adapter *padapter)
 		plist = phead->next;
 
 		while (phead != plist) {
-			psta = container_of(plist, struct sta_info, hash_list);
+			psta = list_entry(plist, struct sta_info, hash_list);
 
 			plist = plist->next;
 
@@ -435,7 +435,7 @@ struct sta_info *rtw_get_stainfo(struct sta_priv *pstapriv, u8 *hwaddr)
 	plist = phead->next;
 
 	while (phead != plist) {
-		psta = container_of(plist, struct sta_info, hash_list);
+		psta = list_entry(plist, struct sta_info, hash_list);
 
 		if ((!memcmp(psta->hwaddr, addr, ETH_ALEN)) == true) {
 			/*  if found the matched address */
@@ -493,7 +493,7 @@ u8 rtw_access_ctrl(struct adapter *padapter, u8 *mac_addr)
 	phead = get_list_head(pacl_node_q);
 	plist = phead->next;
 	while (phead != plist) {
-		paclnode = container_of(plist, struct rtw_wlan_acl_node, list);
+		paclnode = list_entry(plist, struct rtw_wlan_acl_node, list);
 		plist = plist->next;
 
 		if (!memcmp(paclnode->addr, mac_addr, ETH_ALEN)) {
diff --git a/drivers/staging/rtl8188eu/core/rtw_xmit.c b/drivers/staging/rtl8188eu/core/rtw_xmit.c
index 5255c27..1bc98c6 100644
--- a/drivers/staging/rtl8188eu/core/rtw_xmit.c
+++ b/drivers/staging/rtl8188eu/core/rtw_xmit.c
@@ -1401,7 +1401,7 @@ void rtw_free_xmitframe_queue(struct xmit_priv *pxmitpriv, struct __queue *pfram
 	plist = phead->next;
 
 	while (phead != plist) {
-		pxmitframe = container_of(plist, struct xmit_frame, list);
+		pxmitframe = list_entry(plist, struct xmit_frame, list);
 
 		plist = plist->next;
 
@@ -1432,7 +1432,7 @@ static struct xmit_frame *dequeue_one_xmitframe(struct xmit_priv *pxmitpriv, str
 	xmitframe_plist = xmitframe_phead->next;
 
 	if (xmitframe_phead != xmitframe_plist) {
-		pxmitframe = container_of(xmitframe_plist, struct xmit_frame, list);
+		pxmitframe = list_entry(xmitframe_plist, struct xmit_frame, list);
 
 		xmitframe_plist = xmitframe_plist->next;
 
@@ -1473,7 +1473,7 @@ struct xmit_frame *rtw_dequeue_xframe(struct xmit_priv *pxmitpriv, struct hw_xmi
 		sta_plist = sta_phead->next;
 
 		while (sta_phead != sta_plist) {
-			ptxservq = container_of(sta_plist, struct tx_servq, tx_pending);
+			ptxservq = list_entry(sta_plist, struct tx_servq, tx_pending);
 
 			pframe_queue = &ptxservq->sta_pending;
 
@@ -1811,7 +1811,7 @@ static void dequeue_xmitframes_to_sleeping_queue(struct adapter *padapter, struc
 	plist = phead->next;
 
 	while (phead != plist) {
-		pxmitframe = container_of(plist, struct xmit_frame, list);
+		pxmitframe = list_entry(plist, struct xmit_frame, list);
 
 		plist = plist->next;
 
-- 
2.7.4

Re: [PATCH 3/4] Staging: rtl8188eu: core: rtw_mlme_ext: Use list_for_each_entry_safe

[Dan Carpenter]

On Thu, Oct 19, 2017 at 01:01:39AM +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@gmail.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) {

I'm pretty sure we should get rid of the xmitframe_plist variable and
use xmitframe_phead here.

regards,
dan carpenter 

Re: [PATCH 2/4] Staging: rtl8188eu: core: rtw_ap: Use list_for_each_entry_safe

[Dan Carpenter]

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@gmail.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