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Bluetooth: Mesh: Stop scanner before resetting mesh

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When we receive Node Reset message, we schedule work in the system
workqueue to call bt_mesh_reset(). In bt_mesh_reset() we call
bt_conn_disconnect() to disconnect proxy client. bt_conn_disconnect()
will put a buffer to a pool and call k_sem_take to let BT HCI TX thread
process this buffer. Because we stop scanner after disconnecting the
proxy, we can still receive a message at this point. Since BT RX thread
has higher priority than the system workqueue, if we receive a message
while in bt_mesh_reset(), it will be processed when we call
bt_conn_disconnect().

Stop scanner before resetting the mesh to avoid processing of a received
mesh message while in the process of resetting mesh.

Signed-off-by: Pavel Vasilyev <pavel.vasilyev@nordicsemi.no>
This commit is contained in:
Pavel Vasilyev 2023-01-17 12:22:51 +01:00 • committed by Carles Cufí
commit 46b78bb1d5
1 changed files with 2 additions and 1 deletions
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3
subsys/bluetooth/mesh/main.c
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@ -189,6 +189,8 @@ void bt_mesh_reset(void)
memset(bt_mesh.flags, 0, sizeof(bt_mesh.flags));
atomic_set_bit(bt_mesh.flags, BT_MESH_INIT);
bt_mesh_scan_disable();
/* If this fails, the work handler will return early on the next
* execution, as the device is not provisioned. If the device is
* reprovisioned, the timer is always restarted.
@ -231,7 +233,6 @@ void bt_mesh_reset(void)
(void)memset(bt_mesh.dev_key, 0, sizeof(bt_mesh.dev_key));
bt_mesh_scan_disable();
bt_mesh_beacon_disable();
bt_mesh_comp_unprovision();