From d615ac19dbba7b34d6ae9b87ada5f184a7b7054f Mon Sep 17 00:00:00 2001
From: Giovanni Di Sirio <gdisirio@gmail.com>
Date: Sun, 28 Feb 2016 08:42:01 +0000
Subject: [PATCH] Fixed bug #714.

git-svn-id: svn://svn.code.sf.net/p/chibios/svn/branches/stable_16.1.x@8971 35acf78f-673a-0410-8e92-d51de3d6d3f4
---
 os/hal/src/usb.c | 14 ++++++++++++++
 readme.txt       |  2 ++
 2 files changed, 16 insertions(+)

diff --git a/os/hal/src/usb.c b/os/hal/src/usb.c
index 1b4993e49..8e557d14e 100644
--- a/os/hal/src/usb.c
+++ b/os/hal/src/usb.c
@@ -309,6 +309,7 @@ void usbStart(USBDriver *usbp, const USBConfig *config) {
  * @api
  */
 void usbStop(USBDriver *usbp) {
+  unsigned i;
 
   osalDbgCheck(usbp != NULL);
 
@@ -319,6 +320,19 @@ void usbStop(USBDriver *usbp) {
                 "invalid state");
   usb_lld_stop(usbp);
   usbp->state = USB_STOP;
+
+  /* Resetting all ongoing synchronous operations.*/
+  for (i = 0; i <= (unsigned)USB_MAX_ENDPOINTS; i++) {
+    if (usbp->epc[i] != NULL) {
+      if (usbp->epc[i]->in_state != NULL) {
+        osalThreadResumeI(&usbp->epc[i]->in_state->thread, MSG_RESET);
+      }
+      if (usbp->epc[i]->out_state != NULL) {
+        osalThreadResumeI(&usbp->epc[i]->out_state->thread, MSG_RESET);
+      }
+    }
+  }
+  osalOsRescheduleS();
   osalSysUnlock();
 }
 
diff --git a/readme.txt b/readme.txt
index 190c31678..377a51e55 100644
--- a/readme.txt
+++ b/readme.txt
@@ -74,6 +74,8 @@
 
 *** 16.1.4 ***
 - ALL: Startup files relicensed under Apache 2.0.
+- HAL: Fixed usbStop does not resume threads suspended in synchronous calls
+       to usbTransmit (bug #714).
 - VAR: Fixed state check in lwIP when SYS_LIGHTWEIGHT_PROT is disabled
        (bug #713).
 - RT:  Fixed race condition in RT registry (bug #712).