Bluetooth: Controller: Fix Extended connection initiation assertion

Fix assertion on aux context release during extended
connection initiation when supporting multiple simultaneous
interleaved Extended scanning support.

Relates to commit a806592 ("Bluetooth: Controller: Fix
to release aux context stored in node rx").

Relates to commit 193ce73 ("Bluetooth: Controller: Fix
missing resume of primary channel scanning").

Signed-off-by: Vinayak Kariappa Chettimada <[email protected]>

Author: cvinayak

subsys/bluetooth/controller/ll_sw/nordic/lll/lll_scan_aux.c

@@ -1613,9 +1613,14 @@ static void isr_rx_connect_rsp(void *param)
 
 	ull_rx_put_sched(rx->hdr.link, rx);
 
-	if (lll->lll_aux) {
+	/* Check if LLL scheduled auxiliary PDU reception by scan
+	 * context or auxiliary PDU reception by aux context
+	 */
+	if (lll->is_aux_sched) {
 		struct node_rx_pdu *node_rx;
 
+		lll->is_aux_sched = 0U;
+
 		/* Send message to flush Auxiliary PDU list */
 		node_rx = ull_pdu_rx_alloc();
 		LL_ASSERT(node_rx);