Re: [PATCH AUTOSEL 6.17-6.12] usb: xhci-pci: add support for hosts with zero USB3 ports

[Michal Pecio <michal.pecio@gmail.com>]

On Sat, 25 Oct 2025 11:54:27 -0400, Sasha Levin wrote:
> From: Niklas Neronin <niklas.neronin@linux.intel.com>
> 
> [ Upstream commit 719de070f764e079cdcb4ddeeb5b19b3ddddf9c1 ]
> 
> Add xhci support for PCI hosts that have zero USB3 ports.
> Avoid creating a shared Host Controller Driver (HCD) when there is only
> one root hub. Additionally, all references to 'xhci->shared_hcd' are now
> checked before use.
> 
> Only xhci-pci.c requires modification to accommodate this change, as the
> xhci core already supports configurations with zero USB3 ports. This
> capability was introduced when xHCI Platform and MediaTek added support
> for zero USB3 ports.
> 
> Closes: https://bugzilla.kernel.org/show_bug.cgi?id=220181
> Tested-by: Nick Nielsen <nick.kainielsen@free.fr>
> Tested-by: grm1 <grm1@mailbox.org>
> Signed-off-by: Niklas Neronin <niklas.neronin@linux.intel.com>
> Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
> Link: https://lore.kernel.org/r/20250917210726.97100-4-mathias.nyman@linux.intel.com
> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> Signed-off-by: Sasha Levin <sashal@kernel.org>
> ---

Hi Sasha,

This is completely broken, fix is pending in Greg's usb-linus branch.
(Which is something autosel could perhaps check itself...)

8607edcd1748 usb: xhci-pci: Fix USB2-only root hub registration

Michal