qcacmn: Check for pdev/psoc before requesting serialization psoc object

The serialization vdev destroy handlers extracts the psoc
from the vdev, and get its psoc component object.

If the pdev or psoc is NULL for some reason, we get a
crash in object manager while trying to retrieve the serialization
psoc object.

So check for valid pdev/psoc before we get the serialization psoc object.

Change-Id: I9ca45654250403a8b5fe674431251defd1aac6e8
CRs-Fixed: 2524231

umac/cmn_services/serialization/src/wlan_serialization_utils.c

@@ -158,10 +158,28 @@ QDF_STATUS wlan_serialization_cleanup_vdev_timers(
 	struct wlan_serialization_timer *ser_timer;
 	QDF_STATUS status = QDF_STATUS_SUCCESS;
 	uint32_t i = 0;
+	struct wlan_objmgr_pdev *pdev = NULL;
+	struct wlan_objmgr_psoc *psoc = NULL;
 
 	ser_enter();
-	psoc_ser_obj = wlan_serialization_get_psoc_obj(
-			wlan_vdev_get_psoc(vdev));
+
+	pdev = wlan_vdev_get_pdev(vdev);
+	if (!pdev) {
+		QDF_BUG(0);
+		ser_err("pdev is null");
+		status = QDF_STATUS_E_FAILURE;
+		goto error;
+	}
+
+	psoc = wlan_pdev_get_psoc(pdev);
+	if (!psoc) {
+		QDF_BUG(0);
+		ser_err("psoc is null");
+		status = QDF_STATUS_E_FAILURE;
+		goto error;
+	}
+
+	psoc_ser_obj = wlan_serialization_get_psoc_obj(psoc);
 
 	if (!psoc_ser_obj) {
 		ser_err("Invalid psoc_ser_obj");