Re: [PATCH v4 10/18] PCI: dwc: Free the MSI domain after the host .deinit() callback

[Marek Vasut]

On 10/15/26 5:30 AM, Koichiro Den wrote:
> dw_pcie_host_deinit() frees the iMSI-RX domain before calling the host
> .deinit() callback. For a core-owned parent interrupt,
> dw_pcie_free_msi() removes the chained handler right before the domain.
> A glue driver that owns the parent interrupt and demultiplexes the MSIs
> itself through dw_handle_msi_irq() can only stop its handler in
> .deinit(), after the domain is gone, so a late interrupt can still
> dispatch into the freed domain.
>
> Remove the domain after .deinit(), in dw_pcie_host_deinit() and in the
> dw_pcie_host_init() unwind. Keep removing the chained handlers of
> core-owned interrupts before .deinit(), which powers the controller
> down. Clear pp->irq_domain when the domain is removed so the unwind can
> tell whether it exists.
>
> Signed-off-by: Koichiro Den <den@xxxxxxxxxxxxx>
Reviewed-by: Marek Vasut <marek.vasut+renesas@xxxxxxxxxxx>