linux-kernel - [PATCH 12/65] staging: wfx: retrieve greenfield mode from sta->ht_cap and bss

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Date:   Wed, 15 Jan 2020 12:12:24 +0000
From:   Jérôme Pouiller <Jerome.Pouiller@...abs.com>
To:     "devel@...verdev.osuosl.org" <devel@...verdev.osuosl.org>,
        "linux-wireless@...r.kernel.org" <linux-wireless@...r.kernel.org>
CC:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Kalle Valo <kvalo@...eaurora.org>,
        "David S . Miller" <davem@...emloft.net>,
        Jérôme Pouiller <Jerome.Pouiller@...abs.com>
Subject: [PATCH 12/65] staging: wfx: retrieve greenfield mode from sta->ht_cap
 and bss_conf

From: Jérôme Pouiller <jerome.pouiller@...abs.com>

wvif->ht_info contains useless copies of sta->ht_cap and
bss_conf->ht_operation_mode. Prefer to retrieve information from the
original structs instead of rely on wvif->ht_info.

Signed-off-by: Jérôme Pouiller <jerome.pouiller@...abs.com>
---
 drivers/staging/wfx/sta.c | 18 ++++++------------
 1 file changed, 6 insertions(+), 12 deletions(-)

diff --git a/drivers/staging/wfx/sta.c b/drivers/staging/wfx/sta.c
index f13a5b41735c..fcd9fe66e417 100644
--- a/drivers/staging/wfx/sta.c
+++ b/drivers/staging/wfx/sta.c
@@ -817,14 +817,6 @@ static int wfx_is_ht(const struct wfx_ht_info *ht_info)
 	return ht_info->channel_type != NL80211_CHAN_NO_HT;
 }
 
-static int wfx_ht_greenfield(const struct wfx_ht_info *ht_info)
-{
-	return wfx_is_ht(ht_info) &&
-		(ht_info->ht_cap.cap & IEEE80211_HT_CAP_GRN_FLD) &&
-		!(ht_info->operation_mode &
-		  IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
-}
-
 static void wfx_join_finalize(struct wfx_vif *wvif,
 			      struct ieee80211_bss_conf *info)
 {
@@ -849,9 +841,8 @@ static void wfx_join_finalize(struct wfx_vif *wvif,
 	}
 	rcu_read_unlock();
 
-	/* Non Greenfield stations present */
-	if (wvif->ht_info.operation_mode &
-	    IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT)
+	if (sta &&
+	    info->ht_operation_mode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT)
 		hif_dual_cts_protection(wvif, true);
 	else
 		hif_dual_cts_protection(wvif, false);
@@ -862,7 +853,10 @@ static void wfx_join_finalize(struct wfx_vif *wvif,
 	association_mode.spacing = 1;
 	association_mode.short_preamble = info->use_short_preamble;
 	association_mode.basic_rate_set = cpu_to_le32(wfx_rate_mask_to_hw(wvif->wdev, info->basic_rates));
-	association_mode.greenfield = wfx_ht_greenfield(&wvif->ht_info);
+	if (sta && sta->ht_cap.ht_supported &&
+	    !(info->ht_operation_mode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT))
+		association_mode.greenfield =
+			!!(sta->ht_cap.cap & IEEE80211_HT_CAP_GRN_FLD);
 	if (sta && sta->ht_cap.ht_supported)
 		association_mode.mpdu_start_spacing = sta->ht_cap.ampdu_density;
 
-- 
2.25.0