linux-kernel - Re: [PATCH v7 4/6] PCI: dwc: Advertise dynamic inbound mapping support

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Message-ID: <aWaSggUJpnxjAPA_@ryzen>
Date: Tue, 13 Jan 2026 19:44:25 +0100
From: Niklas Cassel <cassel@...nel.org>
To: Koichiro Den <den@...inux.co.jp>
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Subject: Re: [PATCH v7 4/6] PCI: dwc: Advertise dynamic inbound mapping
 support

On Wed, Jan 14, 2026 at 01:27:17AM +0900, Koichiro Den wrote:
> The DesignWare EP core has supported updating the inbound iATU mapping
> for an already configured BAR (i.e. allowing pci_epc_set_bar() to be
> called again without a prior pci_epc_clear_bar()) since
> commit 4284c88fff0e ("PCI: designware-ep: Allow pci_epc_set_bar() update
> inbound map address").
> 
> Now that the EPC layer exposes this capability via the
> dynamic_inbound_mapping feature bit, set the bit centrally in the
> DesignWare EP layer so that all DWC-based EP glue drivers report it
> consistently, without duplicating the same flag in each individual
> driver.
> 
> No functional change intended. This only advertises existing behavior to
> EPF drivers.
> 
> Suggested-by: Niklas Cassel <cassel@...nel.org>
> Signed-off-by: Koichiro Den <den@...inux.co.jp>
> ---

Reviewed-by: Niklas Cassel <cassel@...nel.org>