Re: [PATCH v2] usb: xhci: route endpoints to secondary interrupters

[Greg KH <gregkh@linuxfoundation.org>]

On Wed, Dec 17, 2025 at 04:54:07PM +0800, raoxu wrote:
> This demonstrates that transfer completions are no longer handled
> exclusively by interrupter 0, but are instead distributed across
> multiple MSI-X vectors.
> 
> Signed-off-by: Xu Rao <raoxu@uniontech.com>
> 
> Changelog:
> v1 -> v2:
>   - Bind interrupters to endpoints at enable time instead of selecting
>     per transfer.
>   - Store the selected interrupter in struct xhci_virt_ep and program
>     TRB_INTR_TARGET() from the bound interrupter.
>   - Use a single IRQ handler for both primary and secondary vectors,
>     with STS_EINT handling restricted to interrupter 0.
>   - Keep a common dev_id for IRQ registration to match the existing
>     xhci_cleanup_msix() teardown constraints and avoid dev_id
>     lifetime issues.
>   - Clarify secondary interrupter teardown to avoid double-free or
>     use-after-free during xHCI removal.
> ---
>  drivers/usb/host/xhci-mem.c  | 86 +++++++++++++++++++++++++++++++++---
>  drivers/usb/host/xhci-pci.c  | 28 ++++++++++++
>  drivers/usb/host/xhci-ring.c | 79 ++++++++++++++++++++++++---------
>  drivers/usb/host/xhci.c      | 38 ++++++++++++++++
>  drivers/usb/host/xhci.h      |  7 +++
>  5 files changed, 212 insertions(+), 26 deletions(-)

Changelog goes below the --- line please.

thanks,

greg k-h