qcacld-3.0: Fix static analysis issues in wma_scan_roam.c

Pointer returned from cds_get_contex() may be NULL.
Hence add a NULL check before dereferencing.

Change-Id: I809d70a91e563590468141d4a9e4296bd511d472
CRs-Fixed: 3044372

core/wma/src/wma_scan_roam.c

@@ -5127,6 +5127,9 @@ void cm_roam_update_vdev(struct roam_offload_synch_ind *sync_ind)
 {
 	tp_wma_handle wma = cds_get_context(QDF_MODULE_ID_WMA);
 
+	if (!wma)
+		return;
+
 	wma_roam_update_vdev(wma, sync_ind);
 }
 
@@ -5137,6 +5140,9 @@ cm_roam_pe_sync_callback(struct roam_offload_synch_ind *sync_ind,
 	tp_wma_handle wma = cds_get_context(QDF_MODULE_ID_WMA);
 	QDF_STATUS status;
 
+	if (!wma)
+		return QDF_STATUS_E_INVAL;
+
 	status = wma->pe_roam_synch_cb(wma->mac_context,
 				sync_ind, ie_len,
 				SIR_ROAM_SYNCH_PROPAGATION);
@@ -5149,6 +5155,9 @@ void cm_update_phymode_on_roam(uint8_t vdev_id, uint8_t *bssid,
 {
 	tp_wma_handle wma = cds_get_context(QDF_MODULE_ID_WMA);
 
+	if (!wma)
+		return;
+
 	wma_update_phymode_on_roam(wma, bssid, chan, &wma->interfaces[vdev_id]);
 }