From 74d10ccd3853a3c8ff99d2d8ea031bc49cd6755a Mon Sep 17 00:00:00 2001
From: robbederks <robbe.derks@gmail.com>
Date: Tue, 7 Apr 2020 14:59:19 -0700
Subject: [PATCH] Fixed possible race condition (#487)

---
 board/drivers/usb.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/board/drivers/usb.h b/board/drivers/usb.h
index a62e879..4cfd90d 100644
--- 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) {