From: Jason Wessel <jason.wessel@windriver.com>
Date: Mon, 18 May 2009 15:00:28 +0000 (-0500)
Subject: USB serial device support
X-Git-Tag: v0.11.0-rc0~523
X-Git-Url: http://xenbits.xensource.com/gitweb?a=commitdiff_plain;h=d55ebf5539139b26b9c6412a834cb493f008a8a9;p=qemu-xen-4.3-testing.git

USB serial device support

Add in a workaround to allow the usb serial devices to work with the
usb pass through mechanism.  The ioctl() to request an alternate
interface will always return < 0 for a usb-serial device based on the
kernel driver.  This means there is no alternate interface end point.

This was fully tested with a pl2303 usb serial device.

Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
---

diff --git a/usb-linux.c b/usb-linux.c
index 70d7a1c29..67e4acd51 100644
--- a/usb-linux.c
+++ b/usb-linux.c
@@ -833,8 +833,7 @@ static int usb_linux_update_endp_table(USBHostDevice *s)
 
         ret = ioctl(s->fd, USBDEVFS_CONTROL, &ct);
         if (ret < 0) {
-            perror("usb_linux_update_endp_table");
-            return 1;
+            alt_interface = interface;
         }
 
         /* the current interface descriptor is the active interface