From 0ef8d590db8bc741f3e25610c6e3e6d11dba2c6c Mon Sep 17 00:00:00 2001
From: Kaka1234-ai <73267746+Kaka1234-ai@users.noreply.github.com>
Date: Thu, 18 Nov 2021 10:26:25 +0800
Subject: [PATCH] nimble/ll: Fix master SCA in LE Connection Complete Event

MCA in LE (Enhanced) Connection Complete Event is valid only for
peripheral role (5.3 V4 Part E 7.7.6.5.1).
---
 nimble/controller/src/ble_ll_conn_hci.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/nimble/controller/src/ble_ll_conn_hci.c b/nimble/controller/src/ble_ll_conn_hci.c
index 7e4737738..6489af0d5 100644
--- a/nimble/controller/src/ble_ll_conn_hci.c
+++ b/nimble/controller/src/ble_ll_conn_hci.c
@@ -200,7 +200,9 @@ ble_ll_conn_comp_event_send(struct ble_ll_conn_sm *connsm, uint8_t status,
             enh_ev->conn_itvl = htole16(connsm->conn_itvl);
             enh_ev->conn_latency = htole16(connsm->slave_latency);
             enh_ev->supervision_timeout = htole16(connsm->supervision_tmo);
-            enh_ev->mca = connsm->master_sca;
+            if (connsm->conn_role == BLE_LL_CONN_ROLE_SLAVE) {
+                enh_ev->mca = connsm->master_sca;
+            }
         }
 
         ble_ll_hci_event_send(hci_ev);
@@ -225,7 +227,9 @@ ble_ll_conn_comp_event_send(struct ble_ll_conn_sm *connsm, uint8_t status,
             ev->conn_itvl = htole16(connsm->conn_itvl);
             ev->conn_latency = htole16(connsm->slave_latency);
             ev->supervision_timeout = htole16(connsm->supervision_tmo);
-            ev->mca = connsm->master_sca;
+            if (connsm->conn_role == BLE_LL_CONN_ROLE_SLAVE) {
+                ev->mca = connsm->master_sca;
+            }
         }
 
         ble_ll_hci_event_send(hci_ev);