qcacld-3.0: Fix passing invalid ipa iface

Currently in net dev cleanup of ipa host interface if the
ipa interface does not exist for that particular net dev,
last ipa iface reference is passed. This may lead to invalid
access. So fix by validating the iface context before clean
up of host ipa interface.

Change-Id: I753c922b5c82c676a318df87552051fdd74c983c
CRs-Fixed: 2632382

components/ipa/core/src/wlan_ipa_core.c

@@ -2045,12 +2045,12 @@ static QDF_STATUS __wlan_ipa_wlan_evt(qdf_netdev_t net_dev, uint8_t device_mode,
 			    type == QDF_IPA_AP_DISCONNECT) {
 				for (i = 0; i < WLAN_IPA_MAX_IFACE; i++) {
 					iface_ctx = &ipa_ctx->iface_context[i];
-
-					if (iface_ctx->dev == net_dev)
+					if (iface_ctx->dev == net_dev) {
+						wlan_ipa_cleanup_iface(
+								iface_ctx);
 						break;
+					}
 				}
-				if (iface_ctx)
-					wlan_ipa_cleanup_iface(iface_ctx);
 			}
 
 			return QDF_STATUS_SUCCESS;
@@ -2288,12 +2288,11 @@ static QDF_STATUS __wlan_ipa_wlan_evt(qdf_netdev_t net_dev, uint8_t device_mode,
 
 		for (i = 0; i < WLAN_IPA_MAX_IFACE; i++) {
 			iface_ctx = &ipa_ctx->iface_context[i];
-
-			if (iface_ctx->dev == net_dev)
+			if (iface_ctx->dev == net_dev) {
+				wlan_ipa_cleanup_iface(iface_ctx);
 				break;
+			}
 		}
-		if (i < WLAN_IPA_MAX_IFACE)
-			wlan_ipa_cleanup_iface(iface_ctx);
 
 		qdf_mutex_release(&ipa_ctx->event_lock);
 		break;
@@ -3673,12 +3672,11 @@ void wlan_ipa_cleanup_dev_iface(struct wlan_ipa_priv *ipa_ctx,
 
 	for (i = 0; i < WLAN_IPA_MAX_IFACE; i++) {
 		iface_ctx = &ipa_ctx->iface_context[i];
-		if (iface_ctx->dev == net_dev)
+		if (iface_ctx->dev == net_dev) {
+			wlan_ipa_cleanup_iface(iface_ctx);
 			break;
+		}
 	}
-
-	if (iface_ctx)
-		wlan_ipa_cleanup_iface(iface_ctx);
 }
 
 void wlan_ipa_uc_ssr_cleanup(struct wlan_ipa_priv *ipa_ctx)