qcacld-3.0: Use cfg80211_roamed_bss API to indicate the roaming

qcacld-2.0 to qcacld-3.0 propagation

After disconnect request, the driver sends disconnect
indication to the kernel and it schedules a workqueue to
process this disconnect event. Now if this workqueue is
delayed and connect request is received before its
scheduled, the disconnect event workqueue reset the
ssid_len of the wdev.

Now as the ssid_len does not match with bss ssid length the
get bss returns NULL and thus roam indication is not sent
to supplicant.

To fix this use cfg80211_roamed_bss to indicate the roaming
and use the ssid and ssid len from driver to get the bss.

Change-Id: I5b88ce41951cb61582ee801be124ca0b5b6b825b
CRs-Fixed: 1098150

core/hdd/inc/wlan_hdd_main.h

@@ -1982,6 +1982,25 @@ int hdd_wlan_start_modules(hdd_context_t *hdd_ctx, hdd_adapter_t *adapter,
 			   bool reinit);
 int hdd_wlan_stop_modules(hdd_context_t *hdd_ctx);
 int hdd_start_adapter(hdd_adapter_t *adapter);
+
+/**
+ * hdd_get_bss_entry() - Get the bss entry matching the chan, bssid and ssid
+ * @wiphy: wiphy
+ * @channel: channel of the BSS to find
+ * @bssid: bssid of the BSS to find
+ * @ssid: ssid of the BSS to find
+ * @ssid_len: ssid len of of the BSS to find
+ *
+ * The API is a wrapper to get bss from kernel matching the chan,
+ * bssid and ssid
+ *
+ * Return: bss structure if found else NULL
+ */
+struct cfg80211_bss *hdd_cfg80211_get_bss(struct wiphy *wiphy,
+	struct ieee80211_channel *channel,
+	const u8 *bssid,
+	const u8 *ssid, size_t ssid_len);
+
 void hdd_connect_result(struct net_device *dev, const u8 *bssid,
 			tCsrRoamInfo *roam_info, const u8 *req_ie,
 			size_t req_ie_len, const u8 *resp_ie,

core/hdd/src/wlan_hdd_assoc.c

@@ -1996,17 +1996,14 @@ static void hdd_send_re_assoc_event(struct net_device *dev,
 	qdf_mem_zero(rspRsnIe + len, IW_GENERIC_IE_MAX - len);
 
 	chan = ieee80211_get_channel(pAdapter->wdev.wiphy,
-				     (int)pCsrRoamInfo->pBssDesc->channelId);
+			(int)pCsrRoamInfo->pBssDesc->channelId);
 	sme_roam_get_connect_profile(hal_handle, pAdapter->sessionId,
 		&roam_profile);
-	bss = cfg80211_get_bss(pAdapter->wdev.wiphy, chan,
-			pCsrRoamInfo->bssid.bytes,
-			&roam_profile.SSID.ssId[0], roam_profile.SSID.length,
-#if (LINUX_VERSION_CODE < KERNEL_VERSION(4, 1, 0)) && !defined(WITH_BACKPORTS)
-			WLAN_CAPABILITY_ESS, WLAN_CAPABILITY_ESS);
-#else
-			IEEE80211_BSS_TYPE_ESS, IEEE80211_PRIVACY_ANY);
-#endif
+
+	bss = hdd_cfg80211_get_bss(pAdapter->wdev.wiphy,
+			chan, pCsrRoamInfo->bssid.bytes,
+			&roam_profile.SSID.ssId[0],
+			roam_profile.SSID.length);
 
 	if (bss == NULL)
 		hdd_err("Get BSS returned NULL");
@@ -2584,6 +2581,8 @@ static QDF_STATUS hdd_association_completion_handler(hdd_adapter_t *pAdapter,
 
 				if (ft_carrier_on) {
 					if (!hddDisconInProgress) {
+						struct cfg80211_bss *roam_bss;
+
 						/*
 						 * After roaming is completed,
 						 * active session count is
@@ -2620,10 +2619,17 @@ static QDF_STATUS hdd_association_completion_handler(hdd_adapter_t *pAdapter,
 							QDF_TRACE_LEVEL_DEBUG,
 							pFTAssocReq,
 							assocReqlen);
-
-						cfg80211_roamed(dev, chan,
-								pRoamInfo->
-								bssid.bytes,
+						roam_bss =
+							hdd_cfg80211_get_bss(
+								pAdapter->wdev.wiphy,
+								chan,
+								pRoamInfo->bssid.bytes,
+								pRoamInfo->u.
+								pConnectedProfile->SSID.ssId,
+								pRoamInfo->u.
+								pConnectedProfile->SSID.length);
+						cfg80211_roamed_bss(dev,
+								roam_bss,
 								pFTAssocReq,
 								assocReqlen,
 								pFTAssocRsp,

core/hdd/src/wlan_hdd_cfg80211.c

@@ -11122,43 +11122,6 @@ static int wlan_hdd_cfg80211_set_default_key(struct wiphy *wiphy,
 	return ret;
 }
 
-/*
- * wlan_hdd_cfg80211_get_bss :to get the bss from kernel cache.
- * @wiphy: wiphy pointer
- * @channel: channel of the BSS
- * @bssid: Bssid of BSS
- * @ssid: Ssid of the BSS
- * @ssid_len: ssid length
- *
- * Return: bss found in kernel cache
- */
-#if (LINUX_VERSION_CODE < KERNEL_VERSION(4, 1, 0)) && !defined(WITH_BACKPORTS)
-static
-struct cfg80211_bss *wlan_hdd_cfg80211_get_bss(struct wiphy *wiphy,
-	struct ieee80211_channel *channel, const u8 *bssid,
-	const u8 *ssid, size_t ssid_len)
-{
-	return cfg80211_get_bss(wiphy, channel, bssid,
-			ssid,
-			ssid_len,
-			WLAN_CAPABILITY_ESS,
-			WLAN_CAPABILITY_ESS);
-}
-#else
-static
-struct cfg80211_bss *wlan_hdd_cfg80211_get_bss(struct wiphy *wiphy,
-	struct ieee80211_channel *channel, const u8 *bssid,
-	const u8 *ssid, size_t ssid_len)
-{
-	return cfg80211_get_bss(wiphy, channel, bssid,
-				ssid,
-				ssid_len,
-				IEEE80211_BSS_TYPE_ESS,
-				IEEE80211_PRIVACY_ANY);
-}
-#endif
-
-
 /*
  * wlan_hdd_cfg80211_update_bss_list :to inform nl80211
  * interface that BSS might have been lost.
@@ -11175,7 +11138,7 @@ struct cfg80211_bss *wlan_hdd_cfg80211_update_bss_list(
 	struct wiphy *wiphy = wdev->wiphy;
 	struct cfg80211_bss *bss = NULL;
 
-	bss = wlan_hdd_cfg80211_get_bss(wiphy, NULL, bssid,
+	bss = hdd_cfg80211_get_bss(wiphy, NULL, bssid,
 			NULL, 0);
 	if (bss == NULL) {
 		hdd_err("BSS not present");

core/hdd/src/wlan_hdd_main.c

@@ -3864,10 +3864,8 @@ static bool hdd_is_interface_up(hdd_adapter_t *adapter)
 		return false;
 }
 
-#if defined CFG80211_CONNECT_BSS
 #if (LINUX_VERSION_CODE < KERNEL_VERSION(4, 1, 0)) \
-	&& !defined(WITH_BACKPORTS) && !defined(IEEE80211_PRIVACY)
-static
+	&& !defined(WITH_BACKPORTS)
 struct cfg80211_bss *hdd_cfg80211_get_bss(struct wiphy *wiphy,
 					  struct ieee80211_channel *channel,
 					  const u8 *bssid, const u8 *ssid,
@@ -3879,7 +3877,6 @@ struct cfg80211_bss *hdd_cfg80211_get_bss(struct wiphy *wiphy,
 				WLAN_CAPABILITY_ESS);
 }
 #else
-static
 struct cfg80211_bss *hdd_cfg80211_get_bss(struct wiphy *wiphy,
 					  struct ieee80211_channel *channel,
 					  const u8 *bssid, const u8 *ssid,
@@ -3891,7 +3888,6 @@ struct cfg80211_bss *hdd_cfg80211_get_bss(struct wiphy *wiphy,
 				IEEE80211_PRIVACY_ANY);
 }
 #endif
-#endif
 
 #if defined CFG80211_CONNECT_BSS
 /**