qcacld-3.0: Stop ROC timer synchronously

Mc timer is used to initialize the p2p roc timer.
And the actual timer runs in the soft irq thread and
when the timer exipres it posts the message to mc thread.
Currently, qdf_mc_timer_stop is called to stop the timer.
It calls the del_timer internally to delete the timer.
del_timer() ensures that the given timer is not queued
to run anywhere in the system. But the callback may
be running on another CPU core can create race conditions.

So use del_timer_sync to delete the roc timer.

Change-Id: I2c0fd6e335fc342a3acf06ede534c84d40e19346
CRs-Fixed: 2445705

components/p2p/core/src/wlan_p2p_roc.c

@@ -304,7 +304,7 @@ static QDF_STATUS p2p_execute_cancel_roc_req(
 
 	roc_ctx->roc_state = ROC_STATE_CANCEL_IN_PROG;
 	qdf_event_reset(&p2p_soc_obj->cancel_roc_done);
-	status = qdf_mc_timer_stop(&roc_ctx->roc_timer);
+	status = qdf_mc_timer_stop_sync(&roc_ctx->roc_timer);
 	if (status != QDF_STATUS_SUCCESS)
 		p2p_err("Failed to stop roc timer, roc %pK", roc_ctx);
 
@@ -539,7 +539,7 @@ static QDF_STATUS p2p_process_scan_complete_evt(
 
 	if (QDF_TIMER_STATE_RUNNING ==
 		qdf_mc_timer_get_current_state(&roc_ctx->roc_timer)) {
-		status = qdf_mc_timer_stop(&roc_ctx->roc_timer);
+		status = qdf_mc_timer_stop_sync(&roc_ctx->roc_timer);
 		if (status != QDF_STATUS_SUCCESS)
 			p2p_err("Failed to stop roc timer");
 	}