[PATCH] wifi: mwifiex: avoid AP and STA running on different channel

[David Lin <yu-hao.lin@xxxxxxx>]

Current firmware doesn't support AP and STA running on different
channels simultaneously.
FW crash would occur in such case.
This patch avoids the issue by disabling AP and STA to run on
different channels.

Signed-off-by: David Lin <yu-hao.lin@xxxxxxx>
---
 .../net/wireless/marvell/mwifiex/cfg80211.c   | 71 +++++++++++++++++--
 1 file changed, 66 insertions(+), 5 deletions(-)

diff --git a/drivers/net/wireless/marvell/mwifiex/cfg80211.c b/drivers/net/wireless/marvell/mwifiex/cfg80211.c
index 722ead51e912..53fce5eccc69 100644
--- a/drivers/net/wireless/marvell/mwifiex/cfg80211.c
+++ b/drivers/net/wireless/marvell/mwifiex/cfg80211.c
@@ -781,11 +781,9 @@ mwifiex_cfg80211_set_wiphy_params(struct wiphy *wiphy, u32 changed)
 		break;
 
 	case MWIFIEX_BSS_ROLE_STA:
-		if (priv->media_connected) {
-			mwifiex_dbg(adapter, ERROR,
-				    "cannot change wiphy params when connected");
-			return -EINVAL;
-		}
+		if (priv->media_connected)
+			break;
+
 		if (changed & WIPHY_PARAM_RTS_THRESHOLD) {
 			ret = mwifiex_set_rts(priv,
 					      wiphy->rts_threshold);
@@ -2065,10 +2063,37 @@ static int mwifiex_cfg80211_start_ap(struct wiphy *wiphy,
 {
 	struct mwifiex_uap_bss_param *bss_cfg;
 	struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
+	struct mwifiex_adapter *adapter = priv->adapter;
+	struct mwifiex_private *tmp_priv;
+	int i;
+	struct mwifiex_current_bss_params *bss_params;
+	enum nl80211_band band;
+	int freq;
 
 	if (GET_BSS_ROLE(priv) != MWIFIEX_BSS_ROLE_UAP)
 		return -1;
 
+	for (i = 0; i < MWIFIEX_MAX_BSS_NUM; i++) {
+		tmp_priv = adapter->priv[i];
+		if (tmp_priv == priv)
+			continue;
+		if (GET_BSS_ROLE(tmp_priv) == MWIFIEX_BSS_ROLE_STA &&
+		    tmp_priv->media_connected) {
+			bss_params = &tmp_priv->curr_bss_params;
+			band = mwifiex_band_to_radio_type(bss_params->band);
+			freq = ieee80211_channel_to_frequency
+			       (bss_params->bss_descriptor.channel, band);
+			if (!ieee80211_channel_equal
+			     (params->chandef.chan,
+			      ieee80211_get_channel(wiphy, freq))) {
+				mwifiex_dbg
+				(priv->adapter, MSG,
+				 "AP and STA must operate on same channel\n");
+				return -EOPNOTSUPP;
+			}
+		}
+	}
+
 	bss_cfg = kzalloc(sizeof(struct mwifiex_uap_bss_param), GFP_KERNEL);
 	if (!bss_cfg)
 		return -ENOMEM;
@@ -2437,6 +2462,8 @@ mwifiex_cfg80211_connect(struct wiphy *wiphy, struct net_device *dev,
 	struct mwifiex_adapter *adapter = priv->adapter;
 	struct cfg80211_bss *bss = NULL;
 	int ret;
+	struct mwifiex_private *tmp_priv;
+	int i;
 
 	if (GET_BSS_ROLE(priv) != MWIFIEX_BSS_ROLE_STA) {
 		mwifiex_dbg(adapter, ERROR,
@@ -2451,6 +2478,22 @@ mwifiex_cfg80211_connect(struct wiphy *wiphy, struct net_device *dev,
 		return -EALREADY;
 	}
 
+	for (i = 0; i < MWIFIEX_MAX_BSS_NUM; i++) {
+		tmp_priv = adapter->priv[i];
+		if (tmp_priv == priv)
+			continue;
+		if (GET_BSS_ROLE(tmp_priv) == MWIFIEX_BSS_ROLE_UAP &&
+		    netif_carrier_ok(tmp_priv->netdev) &&
+		    cfg80211_chandef_valid(&tmp_priv->bss_chandef)) {
+			if (!ieee80211_channel_equal
+			     (sme->channel, tmp_priv->bss_chandef.chan)) {
+				mwifiex_dbg(adapter, ERROR,
+					    "STA/AP must on the same channel\n");
+				return -EOPNOTSUPP;
+			}
+		}
+	}
+
 	if (priv->scan_block)
 		priv->scan_block = false;
 
@@ -4285,6 +4328,8 @@ mwifiex_cfg80211_authenticate(struct wiphy *wiphy,
 	u32 tx_control = 0, pkt_type = PKT_TYPE_MGMT;
 	u8 trans = 1, status_code = 0;
 	u8 *varptr;
+	struct mwifiex_private *tmp_priv;
+	int i;
 
 	if (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_UAP) {
 		mwifiex_dbg(priv->adapter, ERROR, "Interface role is AP\n");
@@ -4298,6 +4343,22 @@ mwifiex_cfg80211_authenticate(struct wiphy *wiphy,
 		return -EINVAL;
 	}
 
+	for (i = 0; i < MWIFIEX_MAX_BSS_NUM; i++) {
+		tmp_priv = adapter->priv[i];
+		if (tmp_priv == priv)
+			continue;
+		if (GET_BSS_ROLE(tmp_priv) == MWIFIEX_BSS_ROLE_UAP &&
+		    netif_carrier_ok(tmp_priv->netdev) &&
+		    cfg80211_chandef_valid(&tmp_priv->bss_chandef)) {
+			if (!ieee80211_channel_equal
+			    (req->bss->channel, tmp_priv->bss_chandef.chan)) {
+				mwifiex_dbg(adapter, ERROR,
+					    "STA/AP must on the same channel\n");
+				return -EOPNOTSUPP;
+			}
+		}
+	}
+
 	if (priv->auth_alg != WLAN_AUTH_SAE &&
 	    (priv->auth_flag & HOST_MLME_AUTH_PENDING)) {
 		mwifiex_dbg(priv->adapter, ERROR, "Pending auth on going\n");

base-commit: ae98f5c9fd8ba84cd408b41faa77e65bf1b4cdfa
-- 
2.34.1