Do not enable web_workflow background callbacks if wifi is not enabled/connected

supervisor/shared/web_workflow/web_workflow.c

@@ -258,7 +258,7 @@ void supervisor_web_workflow_status(void) {
 }
 #endif
 
-void supervisor_start_web_workflow(void) {
+bool supervisor_start_web_workflow(void) {
     #if CIRCUITPY_WEB_WORKFLOW && CIRCUITPY_WIFI && CIRCUITPY_OS_GETENV
 
     // Skip starting the workflow if we're not starting from power on or reset.
@@ -268,7 +268,7 @@ void supervisor_start_web_workflow(void) {
         reset_reason != RESET_REASON_DEEP_SLEEP_ALARM &&
         reset_reason != RESET_REASON_UNKNOWN &&
         reset_reason != RESET_REASON_SOFTWARE) {
-        return;
+        return false;
     }
 
     char ssid[33];
@@ -276,7 +276,7 @@ void supervisor_start_web_workflow(void) {
 
     os_getenv_err_t result = common_hal_os_getenv_str("CIRCUITPY_WIFI_SSID", ssid, sizeof(ssid));
     if (result != GETENV_OK) {
-        return;
+        return false;
     }
 
     result = common_hal_os_getenv_str("CIRCUITPY_WIFI_PASSWORD", password, sizeof(password));
@@ -284,7 +284,7 @@ void supervisor_start_web_workflow(void) {
         // if password is unspecified, assume an open network
         password[0] = '\0';
     } else if (result != GETENV_OK) {
-        return;
+        return false;
     }
 
     result = common_hal_os_getenv_str("CIRCUITPY_WEB_INSTANCE_NAME", web_instance_name, sizeof(web_instance_name));
@@ -309,7 +309,7 @@ void supervisor_start_web_workflow(void) {
 
     if (_wifi_status != WIFI_RADIO_ERROR_NONE) {
         common_hal_wifi_radio_set_enabled(&common_hal_wifi_radio_obj, false);
-        return;
+        return false;
     }
 
     // (leaves new_port unchanged on any failure)
@@ -363,6 +363,7 @@ void supervisor_start_web_workflow(void) {
     // Wake polling thread (maybe)
     socketpool_socket_poll_resume();
     #endif
+    return true;
 }
 
 void web_workflow_send_raw(socketpool_socket_obj_t *socket, const uint8_t *buf, int len) {

supervisor/shared/web_workflow/web_workflow.h

@@ -36,7 +36,7 @@
 void supervisor_web_workflow_background(void *data);
 bool supervisor_web_workflow_status_dirty(void);
 void supervisor_web_workflow_status(void);
-void supervisor_start_web_workflow(void);
+bool supervisor_start_web_workflow(void);
 void supervisor_stop_web_workflow(void);
 
 // Share the MDNS object with user code.

supervisor/shared/workflow.c

@@ -45,8 +45,9 @@
 
 #if CIRCUITPY_WEB_WORKFLOW
 #include "supervisor/shared/web_workflow/web_workflow.h"
-#endif
 static background_callback_t workflow_background_cb = {NULL, NULL};
+#endif
+
 
 // Called during a VM reset. Doesn't actually reset things.
 void supervisor_workflow_reset(void) {
@@ -56,17 +57,23 @@ void supervisor_workflow_reset(void) {
 
     #if CIRCUITPY_WEB_WORKFLOW
     if (workflow_background_cb.fun) {
-        supervisor_start_web_workflow();
-        supervisor_workflow_request_background();
+        if (supervisor_start_web_workflow()) {
+            supervisor_workflow_request_background();
+        }
     }
     #endif
 }
 
 void supervisor_workflow_request_background(void) {
+    #if CIRCUITPY_WEB_WORKFLOW
     if (workflow_background_cb.fun) {
         workflow_background_cb.data = NULL;
         background_callback_add_core(&workflow_background_cb);
+    } else {
+        // Unblock polling thread if necessary
+        socketpool_socket_poll_resume();
     }
+    #endif
 }
 
 // Return true if host has completed connection to us (such as USB enumeration).
@@ -98,9 +105,11 @@ void supervisor_workflow_start(void) {
     #endif
 
     #if CIRCUITPY_WEB_WORKFLOW
-    supervisor_start_web_workflow();
-    memset(&workflow_background_cb, 0, sizeof(workflow_background_cb));
-    workflow_background_cb.fun = supervisor_web_workflow_background;
+    if (supervisor_start_web_workflow()) {
+        // Enable background callbacks if web_workflow startup successful
+        memset(&workflow_background_cb, 0, sizeof(workflow_background_cb));
+        workflow_background_cb.fun = supervisor_web_workflow_background;
+    }
     #endif
 
 }