netdev - [PATCH] rtlwifi: replace usage of found with dedicated list iterator variable

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Date:   Thu, 24 Mar 2022 08:21:24 +0100
From:   Jakob Koschel <jakobkoschel@...il.com>
To:     Ping-Ke Shih <pkshih@...ltek.com>
Cc:     Kalle Valo <kvalo@...nel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, Mike Rapoport <rppt@...nel.org>,
        "Brian Johannesmeyer" <bjohannesmeyer@...il.com>,
        Cristiano Giuffrida <c.giuffrida@...nl>,
        "Bos, H.J." <h.j.bos@...nl>, Jakob Koschel <jakobkoschel@...il.com>
Subject: [PATCH] rtlwifi: replace usage of found with dedicated list iterator variable

To move the list iterator variable into the list_for_each_entry_*()
macro in the future it should be avoided to use the list iterator
variable after the loop body.

To *never* use the list iterator variable after the loop it was
concluded to use a separate iterator variable instead of a
found boolean [1].

This removes the need to use a found variable and simply checking if
the variable was set, can determine if the break/goto was hit.

Link: https://lore.kernel.org/all/CAHk-=wgRr_D8CB-D9Kg-c=EHreAsk5SqXPwr9Y7k9sA6cWXJ6w@mail.gmail.com/
Signed-off-by: Jakob Koschel <jakobkoschel@...il.com>
---
 drivers/net/wireless/realtek/rtlwifi/base.c | 13 ++++++-------
 drivers/net/wireless/realtek/rtlwifi/pci.c  | 15 +++++++--------
 2 files changed, 13 insertions(+), 15 deletions(-)

diff --git a/drivers/net/wireless/realtek/rtlwifi/base.c b/drivers/net/wireless/realtek/rtlwifi/base.c
index ffd150ec181f..a7ef84f55939 100644
--- a/drivers/net/wireless/realtek/rtlwifi/base.c
+++ b/drivers/net/wireless/realtek/rtlwifi/base.c
@@ -1994,8 +1994,7 @@ void rtl_collect_scan_list(struct ieee80211_hw *hw, struct sk_buff *skb)
 	struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 	unsigned long flags;
 
-	struct rtl_bssid_entry *entry;
-	bool entry_found = false;
+	struct rtl_bssid_entry *entry = NULL, *iter;
 
 	/* check if it is scanning */
 	if (!mac->act_scanning)
@@ -2008,10 +2007,10 @@ void rtl_collect_scan_list(struct ieee80211_hw *hw, struct sk_buff *skb)
 
 	spin_lock_irqsave(&rtlpriv->locks.scan_list_lock, flags);
 
-	list_for_each_entry(entry, &rtlpriv->scan_list.list, list) {
-		if (memcmp(entry->bssid, hdr->addr3, ETH_ALEN) == 0) {
-			list_del_init(&entry->list);
-			entry_found = true;
+	list_for_each_entry(iter, &rtlpriv->scan_list.list, list) {
+		if (memcmp(iter->bssid, hdr->addr3, ETH_ALEN) == 0) {
+			list_del_init(&iter->list);
+			entry = iter;
 			rtl_dbg(rtlpriv, COMP_SCAN, DBG_LOUD,
 				"Update BSSID=%pM to scan list (total=%d)\n",
 				hdr->addr3, rtlpriv->scan_list.num);
@@ -2019,7 +2018,7 @@ void rtl_collect_scan_list(struct ieee80211_hw *hw, struct sk_buff *skb)
 		}
 	}
 
-	if (!entry_found) {
+	if (!entry) {
 		entry = kmalloc(sizeof(*entry), GFP_ATOMIC);
 
 		if (!entry)
diff --git a/drivers/net/wireless/realtek/rtlwifi/pci.c b/drivers/net/wireless/realtek/rtlwifi/pci.c
index ad327bae754b..8e4c15654746 100644
--- a/drivers/net/wireless/realtek/rtlwifi/pci.c
+++ b/drivers/net/wireless/realtek/rtlwifi/pci.c
@@ -323,14 +323,13 @@ static bool rtl_pci_check_buddy_priv(struct ieee80211_hw *hw,
 {
 	struct rtl_priv *rtlpriv = rtl_priv(hw);
 	struct rtl_pci_priv *pcipriv = rtl_pcipriv(hw);
-	bool find_buddy_priv = false;
-	struct rtl_priv *tpriv;
+	struct rtl_priv *tpriv = NULL, *iter;
 	struct rtl_pci_priv *tpcipriv = NULL;
 
 	if (!list_empty(&rtlpriv->glb_var->glb_priv_list)) {
-		list_for_each_entry(tpriv, &rtlpriv->glb_var->glb_priv_list,
+		list_for_each_entry(iter, &rtlpriv->glb_var->glb_priv_list,
 				    list) {
-			tpcipriv = (struct rtl_pci_priv *)tpriv->priv;
+			tpcipriv = (struct rtl_pci_priv *)iter->priv;
 			rtl_dbg(rtlpriv, COMP_INIT, DBG_LOUD,
 				"pcipriv->ndis_adapter.funcnumber %x\n",
 				pcipriv->ndis_adapter.funcnumber);
@@ -344,19 +343,19 @@ static bool rtl_pci_check_buddy_priv(struct ieee80211_hw *hw,
 			    tpcipriv->ndis_adapter.devnumber &&
 			    pcipriv->ndis_adapter.funcnumber !=
 			    tpcipriv->ndis_adapter.funcnumber) {
-				find_buddy_priv = true;
+				tpriv = iter;
 				break;
 			}
 		}
 	}
 
 	rtl_dbg(rtlpriv, COMP_INIT, DBG_LOUD,
-		"find_buddy_priv %d\n", find_buddy_priv);
+		"find_buddy_priv %d\n", tpriv != NULL);
 
-	if (find_buddy_priv)
+	if (tpriv)
 		*buddy_priv = tpriv;
 
-	return find_buddy_priv;
+	return tpriv != NULL;
 }
 
 static void rtl_pci_get_linkcontrol_field(struct ieee80211_hw *hw)

base-commit: f443e374ae131c168a065ea1748feac6b2e76613
-- 
2.25.1