On 6/27/26 2:37 PM, Beibei Yang wrote:
In a system with multiple XHCI controllers, the global descriptor.hub
(bNbrPorts) can be overwritten by a later initialized controller,
causing the root hub of an earlier controller to report wrong port
numbers.
Fix this by dynamically setting bNbrPorts from the current controller's
hcsparams1 in the USB_DT_HUB request handler, instead of relying on
a stale global value.
How about having one descriptor per controller ?
This is probably easily doable in xhci_lowlevel_init() with some
ctrl->hub_desc = kmemdup(descriptor.hub,...); and related tweaks.
What do you think ?
