linux-kernel - [PATCH 3.16 076/192] mwifiex: do not update MCS set from hostapd

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Date:   Mon, 09 Oct 2017 13:44:24 +0100
From:   Ben Hutchings <ben@...adent.org.uk>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:     akpm@...ux-foundation.org, "Kalle Valo" <kvalo@...eaurora.org>,
        "Ganapathi Bhat" <gbhat@...vell.com>
Subject: [PATCH 3.16 076/192] mwifiex: do not update MCS set from hostapd

3.16.49-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Ganapathi Bhat <gbhat@...vell.com>

commit 8a063a27815a759b99ad710402da1ccd1b0987f7 upstream.

We should not copy the MCS set from hostapd RX-STBC. We
have to just use the MCS set supported by the hardware.
This fixes an issue, where mwifiex is advertising wrong
MCS sets in beacons.

Fixes: 474a41e94dfc ("mwifiex: update MCS set as per RX-STBC bit from hostapd")
Signed-off-by: Ganapathi Bhat <gbhat@...vell.com>
Signed-off-by: Kalle Valo <kvalo@...eaurora.org>
[bwh: Backported to 3.16:
 - Deleted code is slightly different
 - Adjust filename]
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 drivers/net/wireless/mwifiex/fw.h      |  5 -----
 drivers/net/wireless/mwifiex/uap_cmd.c | 22 ----------------------
 2 files changed, 27 deletions(-)

--- a/drivers/net/wireless/mwifiex/fw.h
+++ b/drivers/net/wireless/mwifiex/fw.h
@@ -203,11 +203,6 @@ enum MWIFIEX_802_11_PRIVACY_FILTER {
 
 #define MWIFIEX_DEF_AMPDU	IEEE80211_HT_AMPDU_PARM_FACTOR
 
-#define GET_RXSTBC(x) (x & IEEE80211_HT_CAP_RX_STBC)
-#define MWIFIEX_RX_STBC1	0x0100
-#define MWIFIEX_RX_STBC12	0x0200
-#define MWIFIEX_RX_STBC123	0x0300
-
 /* dev_cap bitmap
  * BIT
  * 0-16		reserved
--- a/drivers/net/wireless/mwifiex/uap_cmd.c
+++ b/drivers/net/wireless/mwifiex/uap_cmd.c
@@ -159,7 +159,6 @@ mwifiex_set_ht_params(struct mwifiex_pri
 		      struct cfg80211_ap_settings *params)
 {
 	const u8 *ht_ie;
-	u16 cap_info;
 
 	if (!ISSUPP_11NENABLED(priv->adapter->fw_cap_info))
 		return;
@@ -169,27 +168,6 @@ mwifiex_set_ht_params(struct mwifiex_pri
 	if (ht_ie) {
 		memcpy(&bss_cfg->ht_cap, ht_ie + 2,
 		       sizeof(struct ieee80211_ht_cap));
-		cap_info = le16_to_cpu(bss_cfg->ht_cap.cap_info);
-		memset(&bss_cfg->ht_cap.mcs, 0,
-		       priv->adapter->number_of_antenna);
-		switch (GET_RXSTBC(cap_info)) {
-		case MWIFIEX_RX_STBC1:
-			/* HT_CAP 1X1 mode */
-			bss_cfg->ht_cap.mcs.rx_mask[0] = 0xff;
-			break;
-		case MWIFIEX_RX_STBC12:	/* fall through */
-		case MWIFIEX_RX_STBC123:
-			/* HT_CAP 2X2 mode */
-			bss_cfg->ht_cap.mcs.rx_mask[0] = 0xff;
-			bss_cfg->ht_cap.mcs.rx_mask[1] = 0xff;
-			break;
-		default:
-			dev_warn(priv->adapter->dev,
-				 "Unsupported RX-STBC, default to 2x2\n");
-			bss_cfg->ht_cap.mcs.rx_mask[0] = 0xff;
-			bss_cfg->ht_cap.mcs.rx_mask[1] = 0xff;
-			break;
-		}
 		priv->ap_11n_enabled = 1;
 	} else {
 		memset(&bss_cfg->ht_cap , 0, sizeof(struct ieee80211_ht_cap));