Fixed possible race condition (#487)

commaai · Apr 7, 2020 · 74d10cc · 74d10cc
1 parent a05361e
commit 74d10cc
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/board/drivers/usb.h b/board/drivers/usb.h
@@ -941,10 +941,12 @@ void usb_irqhandler(void) {
 }
 
 void usb_outep3_resume_if_paused() {
+  ENTER_CRITICAL();
   if (!outep3_processing && (USBx_OUTEP(3)->DOEPCTL & USB_OTG_DOEPCTL_NAKSTS) != 0) {
     USBx_OUTEP(3)->DOEPTSIZ = (1U << 19) | 0x40U;
     USBx_OUTEP(3)->DOEPCTL |= USB_OTG_DOEPCTL_EPENA | USB_OTG_DOEPCTL_CNAK;
   }
+  EXIT_CRITICAL();
 }
 
 void OTG_FS_IRQ_Handler(void) {