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esp32/network_ppp: Use non-thread-safe API inside status callback.

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The status callback runs on the lwIP tcpip_thread, and thus must use the
non-thread-safe API because the thread-safe API would cause a deadlock.

Signed-off-by: Daniël van de Giessen <daniel@dvdgiessen.nl>
This commit is contained in:
Daniël van de Giessen
2025-07-10 14:43:29 +02:00
committed by Damien George
parent 361c615f3e
commit adcfdf625b
2 changed files with 13 additions and 6 deletions
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8
extmod/network_ppp_lwip.c
View File

@@ -62,8 +62,6 @@ typedef struct _network_ppp_obj_t {
const mp_obj_type_t mp_network_ppp_lwip_type;
static mp_obj_t network_ppp___del__(mp_obj_t self_in);
static void network_ppp_stream_uart_irq_disable(network_ppp_obj_t *self) {
if (self->stream == mp_const_none) {
return;
@@ -88,8 +86,12 @@ static void network_ppp_status_cb(ppp_pcb *pcb, int err_code, void *ctx) {
// only need to free the PPP PCB, not close it.
self->state = STATE_ACTIVE;
}
network_ppp_stream_uart_irq_disable(self);
// Clean up the PPP PCB.
network_ppp___del__(MP_OBJ_FROM_PTR(self));
if (ppp_free(pcb) == ERR_OK) {
self->state = STATE_INACTIVE;
self->pcb = NULL;
}
break;
default:
self->state = STATE_ERROR;

11
ports/esp32/network_ppp.c
View File

@@ -68,8 +68,6 @@ typedef struct _network_ppp_obj_t {
const mp_obj_type_t esp_network_ppp_lwip_type;
static mp_obj_t network_ppp___del__(mp_obj_t self_in);
static void network_ppp_stream_uart_irq_disable(network_ppp_obj_t *self) {
if (self->stream == mp_const_none) {
return;
@@ -94,8 +92,15 @@ static void network_ppp_status_cb(ppp_pcb *pcb, int err_code, void *ctx) {
// only need to free the PPP PCB, not close it.
self->state = STATE_ACTIVE;
}
network_ppp_stream_uart_irq_disable(self);
// Clean up the PPP PCB.
network_ppp___del__(MP_OBJ_FROM_PTR(self));
// Note: Because we use pppapi_close instead of ppp_close, this
// callback will run on the lwIP tcpip_thread, thus to prevent a
// deadlock we must use the non-threadsafe function here.
if (ppp_free(pcb) == ERR_OK) {
self->state = STATE_INACTIVE;
self->pcb = NULL;
}
break;
default:
self->state = STATE_ERROR;