From ad55f78a0795e3741cafd9f06f438922279befd2 Mon Sep 17 00:00:00 2001
From: Amaury Pouly <pamaury@rockbox.org>
Date: Thu, 25 Mar 2010 13:50:26 +0000
Subject: Commit a HID fix by gevaerts that prevent the HID driver to call
 usb_drv_send_nonblocking while the previous transfer has not finished because
 the current stack doesn't support transfer queueing.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@25329 a1c6a512-1295-4272-9138-f99709370657
---
 firmware/usbstack/usb_hid.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/firmware/usbstack/usb_hid.c b/firmware/usbstack/usb_hid.c
index 4c76ff6db6..213f97180e 100644
--- a/firmware/usbstack/usb_hid.c
+++ b/firmware/usbstack/usb_hid.c
@@ -180,6 +180,7 @@ static int cur_buf_prepare;
 static int cur_buf_send;
 
 static bool active = false;
+static bool currently_sending = false;
 static int ep_in;
 static int usb_interface;
 
@@ -595,6 +596,7 @@ void usb_hid_init_connection(void)
     logf("hid: init connection");
 
     active = true;
+    currently_sending = false;
 }
 
 /* called by usb_core_init() */
@@ -611,12 +613,14 @@ void usb_hid_init(void)
     cur_buf_send = 0;
 
     active = true;
+    currently_sending = false;
 }
 
 void usb_hid_disconnect(void)
 {
     logf("hid: disconnect");
     active = false;
+    currently_sending = false;
 }
 
 /* called by usb_core_transfer_complete() */
@@ -627,6 +631,7 @@ void usb_hid_transfer_complete(int ep, int dir, int status, int length)
     (void)status;
     (void)length;
 
+    logf("HID: transfer complete: %d %d %d %d",ep,dir,status,length);
     switch (dir)
     {
         case USB_DIR_OUT:
@@ -638,6 +643,7 @@ void usb_hid_transfer_complete(int ep, int dir, int status, int length)
 
             send_buffer_len[cur_buf_send] = 0;
             HID_BUF_INC(cur_buf_send);
+            currently_sending = false;
             usb_hid_try_send_drv();
             break;
         }
@@ -787,7 +793,15 @@ static void usb_hid_try_send_drv(void)
     if (!length)
         return;
 
+    if (currently_sending)
+    {
+        logf("HID: Already sending");
+        return;
+    }
+
+    logf("HID: Sending %d bytes",length);
     rc = usb_drv_send_nonblocking(ep_in, send_buffer[cur_buf_send], length);
+    currently_sending = true;
     if (rc)
     {
         send_buffer_len[cur_buf_send] = 0;
-- 
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