linux-kernel - Re: [PATCH v2 0/2] PCI: dwc: ep: Fix BAR update handling with in-place epf

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Message-ID: <swffoq2q4ylllsexm27mmj3dwbra2zor6sy7vaxikdz3mg3bk7@7fwowt2c7erq>
Date: Mon, 9 Feb 2026 21:56:59 +0900
From: Koichiro Den <den@...inux.co.jp>
To: Manivannan Sadhasivam <mani@...nel.org>
Cc: cassel@...nel.org, kwilczynski@...nel.org, kishon@...nel.org, 
	bhelgaas@...gle.com, corbet@....net, jingoohan1@...il.com, lpieralisi@...nel.org, 
	robh@...nel.org, Frank.Li@....com, linux-pci@...r.kernel.org, 
	linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 0/2] PCI: dwc: ep: Fix BAR update handling with
 in-place epf_bar reuse

On Mon, Feb 09, 2026 at 05:05:28PM +0530, Manivannan Sadhasivam wrote:
> On Mon, Feb 09, 2026 at 02:40:13PM +0900, Koichiro Den wrote:
> > On Mon, Feb 02, 2026 at 11:54:05PM +0900, Koichiro Den wrote:
> > > Hi,
> > > 
> > > This patch series is a follow-up to a side discussion that started from
> > > Niklas' comment at:
> > > https://lore.kernel.org/all/aXtrW7viGZfMNZur@ryzen/
> > > 
> > > This series:
> > >   1) Makes BAR Match vs Address Match teardown in DesignWare EP explicit
> > >      by returning right after clearing a BAR-match inbound mapping.
> > >   2) Fixes the dw_pcie_ep_set_bar() mapping-update path to run
> > >      dw_pcie_ep_clear_ib_maps() unconditionally, since the driver cannot
> > >      reliably distinguish BAR Match -> BAR Match from Address Match ->
> > >      BAR Match transitions when the same epf_bar instance is updated in
> > >      place and passed in again.
> > > 
> > > Base: controller/dwc branch, latest:
> > > commit a24149881558 ("PCI: dwc: ep: Add comment explaining controller level
> > >                       PTM access in multi PF setup")
> > > 
> > > Changes since v1:
> > >   - Switched from the v1 approach (Y) to the alternative approach (X)
> > >     that was proposed earlier in the discussion.
> > >     Details of the v1 (Y) vs v2 (X) are described at:
> > >     https://lore.kernel.org/all/sextbnbmsur2xjfoun2l4lr5vekmpzae7sx6or2ird44t6ud6d@yprcz43tpq4p/
> > >   - Changed the subject.
> > > 
> > > v1: https://lore.kernel.org/all/20260131133655.218018-1-den@valinux.co.jp/
> > > 
> > > Thanks,
> > 
> > Hi Mani,
> > 
> > Just following up on this series.
> > If this looks fine to you, would you mind picking it up when you have a
> > chance?
> > (Niklas has also commented here: https://lore.kernel.org/all/aYSZxCtACmQyC0XT@ryzen/)
> > 
> 
> Sorry, I cannot get this series for 7.0 as it is too late. I'll try to get it
> early once 7.0-rc1 is released.

Thanks for letting me know. That's totally fine by me.

Koichiro

> 
> - Mani
> 
> -- 
> மணிவண்ணன் சதாசிவம்