Author: hselasky
Date: Tue Mar 8 08:02:39 2011
New Revision: 219395
URL: http://svn.freebsd.org/changeset/base/219395
Log:
- Bugfix: Root HUBs do not support re-enumeration.
MFC after: 14 days
Approved by: thompsa (mentor)
Modified:
head/sys/dev/usb/usb_generic.c
Modified: head/sys/dev/usb/usb_generic.c
==============================================================================
--- head/sys/dev/usb/usb_generic.c Tue Mar 8 07:42:09 2011
(r219394)
+++ head/sys/dev/usb/usb_generic.c Tue Mar 8 08:02:39 2011
(r219395)
@@ -952,8 +952,14 @@ ugen_re_enumerate(struct usb_fifo *f)
}
if (udev->flags.usb_mode != USB_MODE_HOST) {
/* not possible in device side mode */
+ DPRINTFN(6, "device mode\n");
return (ENOTTY);
}
+ if (udev->parent_hub == NULL) {
+ /* the root HUB cannot be re-enumerated */
+ DPRINTFN(6, "cannot reset root HUB\n");
+ return (EINVAL);
+ }
/* make sure all FIFO's are gone */
/* else there can be a deadlock */
if (ugen_fs_uninit(f)) {
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