linux-kernel - [PATCH] staging: r8188eu: replace hand coded loop with list_for_each

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Date:   Sat, 11 Feb 2023 18:02:23 +0100
From:   Martin Kaiser <martin@...ser.cx>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Larry Finger <Larry.Finger@...inger.net>,
        Phillip Potter <phil@...lpotter.co.uk>,
        Michael Straube <straube.linux@...il.com>,
        Pavel Skripkin <paskripkin@...il.com>,
        linux-staging@...ts.linux.dev, linux-kernel@...r.kernel.org,
        Martin Kaiser <martin@...ser.cx>
Subject: [PATCH] staging: r8188eu: replace hand coded loop with list_for_each_entry

In function rtw_get_stainfo, we can use list_for_each_entry to iterate
over the list of stations and make the code a bit simpler.

Signed-off-by: Martin Kaiser <martin@...ser.cx>
---
 drivers/staging/r8188eu/core/rtw_sta_mgt.c | 16 ++++------------
 1 file changed, 4 insertions(+), 12 deletions(-)

diff --git a/drivers/staging/r8188eu/core/rtw_sta_mgt.c b/drivers/staging/r8188eu/core/rtw_sta_mgt.c
index a9c29b2bf230..e1ae1859686e 100644
--- a/drivers/staging/r8188eu/core/rtw_sta_mgt.c
+++ b/drivers/staging/r8188eu/core/rtw_sta_mgt.c
@@ -391,8 +391,7 @@ void rtw_free_all_stainfo(struct adapter *padapter)
 /* any station allocated can be searched by hash list */
 struct sta_info *rtw_get_stainfo(struct sta_priv *pstapriv, u8 *hwaddr)
 {
-	struct list_head *plist, *phead;
-	struct sta_info *psta = NULL;
+	struct sta_info *ploop, *psta = NULL;
 	u32	index;
 	u8 *addr;
 	u8 bc_addr[ETH_ALEN] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
@@ -409,18 +408,11 @@ struct sta_info *rtw_get_stainfo(struct sta_priv *pstapriv, u8 *hwaddr)
 
 	spin_lock_bh(&pstapriv->sta_hash_lock);
 
-	phead = &pstapriv->sta_hash[index];
-	plist = phead->next;
-
-	while (phead != plist) {
-		psta = container_of(plist, struct sta_info, hash_list);
-
-		if ((!memcmp(psta->hwaddr, addr, ETH_ALEN))) {
-			/*  if found the matched address */
+	list_for_each_entry(ploop, &pstapriv->sta_hash[index], hash_list) {
+		if (!memcmp(ploop->hwaddr, addr, ETH_ALEN)) {
+			psta = ploop;
 			break;
 		}
-		psta = NULL;
-		plist = plist->next;
 	}
 
 	spin_unlock_bh(&pstapriv->sta_hash_lock);
-- 
2.30.2