linux-kernel - [PATCH 08/31] wifi: mwifiex: simplify mwifiex_setup_ht

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Message-Id: <20240820-mwifiex-cleanup-v1-8-320d8de4a4b7@pengutronix.de>
Date: Tue, 20 Aug 2024 13:55:33 +0200
From: Sascha Hauer <s.hauer@...gutronix.de>
To: Brian Norris <briannorris@...omium.org>, 
 Francesco Dolcini <francesco@...cini.it>, Kalle Valo <kvalo@...nel.org>
Cc: linux-wireless@...r.kernel.org, linux-kernel@...r.kernel.org, 
 kernel@...gutronix.de, Sascha Hauer <s.hauer@...gutronix.de>
Subject: [PATCH 08/31] wifi: mwifiex: simplify mwifiex_setup_ht_caps()

In mwifiex_setup_ht_caps() first a local struct ieee80211_mcs_info
is initialized and afterwards copied over &ht_info->mcs. Simplify
this by initializing &ht_info->mcs directly.

While at it call memset on the u8 rx_mask[] array instead of the struct
which makes the intention clearer and we no longer have to assume the
rx_mask array is the first member of struct ieee80211_mcs_info.

Signed-off-by: Sascha Hauer <s.hauer@...gutronix.de>
---
 drivers/net/wireless/marvell/mwifiex/cfg80211.c | 16 +++++-----------
 1 file changed, 5 insertions(+), 11 deletions(-)

diff --git a/drivers/net/wireless/marvell/mwifiex/cfg80211.c b/drivers/net/wireless/marvell/mwifiex/cfg80211.c
index d1cdbeafcfbcb..784f342a9bf23 100644
--- a/drivers/net/wireless/marvell/mwifiex/cfg80211.c
+++ b/drivers/net/wireless/marvell/mwifiex/cfg80211.c
@@ -2906,16 +2906,12 @@ mwifiex_setup_ht_caps(struct ieee80211_sta_ht_cap *ht_info,
 		      struct mwifiex_private *priv)
 {
 	int rx_mcs_supp;
-	struct ieee80211_mcs_info mcs_set;
-	u8 *mcs = (u8 *)&mcs_set;
 	struct mwifiex_adapter *adapter = priv->adapter;
 
 	ht_info->ht_supported = true;
 	ht_info->ampdu_factor = IEEE80211_HT_MAX_AMPDU_64K;
 	ht_info->ampdu_density = IEEE80211_HT_MPDU_DENSITY_NONE;
 
-	memset(&ht_info->mcs, 0, sizeof(ht_info->mcs));
-
 	/* Fill HT capability information */
 	if (ISSUPP_CHANWIDTH40(adapter->hw_dot_11n_dev_cap))
 		ht_info->cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
@@ -2961,17 +2957,15 @@ mwifiex_setup_ht_caps(struct ieee80211_sta_ht_cap *ht_info,
 	ht_info->cap |= IEEE80211_HT_CAP_SM_PS;
 
 	rx_mcs_supp = GET_RXMCSSUPP(adapter->user_dev_mcs_support);
+
+	memset(&ht_info->mcs, 0, sizeof(ht_info->mcs));
 	/* Set MCS for 1x1/2x2 */
-	memset(mcs, 0xff, rx_mcs_supp);
-	/* Clear all the other values */
-	memset(&mcs[rx_mcs_supp], 0,
-	       sizeof(struct ieee80211_mcs_info) - rx_mcs_supp);
+	memset(ht_info->mcs.rx_mask, 0xff, rx_mcs_supp);
+
 	if (priv->bss_mode == NL80211_IFTYPE_STATION ||
 	    ISSUPP_CHANWIDTH40(adapter->hw_dot_11n_dev_cap))
 		/* Set MCS32 for infra mode or ad-hoc mode with 40MHz support */
-		SETHT_MCS32(mcs_set.rx_mask);
-
-	memcpy((u8 *) &ht_info->mcs, mcs, sizeof(struct ieee80211_mcs_info));
+		SETHT_MCS32(ht_info->mcs.rx_mask);
 
 	ht_info->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
 }

-- 
2.39.2