usb_canbus: Prioritize local response sending over new host messages

Prioritize sending responses back to the host over transmitting new messages from the host. Otherwise, the gs_usb host usb acknowledgments could saturate the usb bandwidth for extended periods. Signed-off-by: Kevin O'Connor <[email protected]>
Klipper3d · Sep 26, 2023 · 3eb149c · 3eb149c
1 parent d0f01dd
commit 3eb149c
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/src/generic/usb_canbus.c b/src/generic/usb_canbus.c
@@ -244,9 +244,9 @@ usbcan_task(void)
 
         // Send any previous echo frames
         if (host_status) {
-            if (UsbCan.usb_send_busy)
+            if (UsbCan.notify_local || UsbCan.usb_send_busy)
                 // Don't send echo frame until other traffic is sent
-                return;
+                break;
             int ret = usb_send_bulk_in(gs, sizeof(*gs));
             if (ret < 0)
                 return;