linux-kernel - [PATCH] wifi: rtw89: chan: Use swap() to improve rtw89_swap_sub

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Message-ID: <20240710190426.709964-2-thorsten.blum@toblux.com>
Date: Wed, 10 Jul 2024 21:04:27 +0200
From: Thorsten Blum <thorsten.blum@...lux.com>
To: pkshih@...ltek.com,
	kvalo@...nel.org
Cc: linux-wireless@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Thorsten Blum <thorsten.blum@...lux.com>
Subject: [PATCH] wifi: rtw89: chan: Use swap() to improve rtw89_swap_sub_entity()

Use the swap() macro to simplify the rtw89_swap_sub_entity() function
and improve its readability. Remove the local variable tmp.

Fixes the following Coccinelle/coccicheck warning reported by
swap.cocci:

  WARNING opportunity for swap()

Compile-tested only.

Signed-off-by: Thorsten Blum <thorsten.blum@...lux.com>
---
 drivers/net/wireless/realtek/rtw89/chan.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/drivers/net/wireless/realtek/rtw89/chan.c b/drivers/net/wireless/realtek/rtw89/chan.c
index 051a3cad6101..3b1997223cc5 100644
--- a/drivers/net/wireless/realtek/rtw89/chan.c
+++ b/drivers/net/wireless/realtek/rtw89/chan.c
@@ -2322,7 +2322,6 @@ static void rtw89_swap_sub_entity(struct rtw89_dev *rtwdev,
 				  enum rtw89_sub_entity_idx idx2)
 {
 	struct rtw89_hal *hal = &rtwdev->hal;
-	struct rtw89_sub_entity tmp;
 	struct rtw89_vif *rtwvif;
 	u8 cur;
 
@@ -2332,9 +2331,7 @@ static void rtw89_swap_sub_entity(struct rtw89_dev *rtwdev,
 	hal->sub[idx1].cfg->idx = idx2;
 	hal->sub[idx2].cfg->idx = idx1;
 
-	tmp = hal->sub[idx1];
-	hal->sub[idx1] = hal->sub[idx2];
-	hal->sub[idx2] = tmp;
+	swap(hal->sub[idx1], hal->sub[idx2]);
 
 	rtw89_for_each_rtwvif(rtwdev, rtwvif) {
 		if (!rtwvif->chanctx_assigned)
-- 
2.45.2