linux-kernel - Re: [PATCH v4 4/5] PCI: host-common: Add link down handling for host bridges

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Message-ID: <fpb23ogxfppvrkbr7mwk5jinq3m5bswzzepkt4hqpchycvttfl@o72xdeqm3eia>
Date: Wed, 9 Jul 2025 18:02:42 +0530
From: Manivannan Sadhasivam <mani@...nel.org>
To: Niklas Cassel <cassel@...nel.org>
Cc: Bjorn Helgaas <helgaas@...nel.org>, 
	Mahesh J Salgaonkar <mahesh@...ux.ibm.com>, Oliver O'Halloran <oohall@...il.com>, 
	Bjorn Helgaas <bhelgaas@...gle.com>, Lorenzo Pieralisi <lpieralisi@...nel.org>, 
	Krzysztof Wilczyński <kw@...ux.com>, Rob Herring <robh@...nel.org>, 
	Zhou Wang <wangzhou1@...ilicon.com>, Will Deacon <will@...nel.org>, Robert Richter <rric@...nel.org>, 
	Alyssa Rosenzweig <alyssa@...enzweig.io>, Marc Zyngier <maz@...nel.org>, 
	Conor Dooley <conor.dooley@...rochip.com>, Daire McNamara <daire.mcnamara@...rochip.com>, 
	dingwei@...vell.com, Lukas Wunner <lukas@...ner.de>, 
	Krishna Chaitanya Chundru <krishna.chundru@....qualcomm.com>, linuxppc-dev@...ts.ozlabs.org, linux-pci@...r.kernel.org, 
	linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org, 
	linux-arm-kernel@...ts.infradead.org, linux-riscv@...ts.infradead.org
Subject: Re: [PATCH v4 4/5] PCI: host-common: Add link down handling for host
 bridges

On Mon, Jul 07, 2025 at 01:29:22PM GMT, Niklas Cassel wrote:
> + Mani's kernel.org email.
> 
> On Mon, Jul 07, 2025 at 01:05:39PM +0200, Niklas Cassel wrote:
> > Hello Mani,
> > 
> > On Fri, May 30, 2025 at 09:39:28PM +0530, Manivannan Sadhasivam wrote:
> > > On Fri, May 30, 2025 at 06:34:04AM -0500, Bjorn Helgaas wrote:
> > > 
> > > > I think pci_host_handle_link_down() should take a Root Port, not a
> > > > host bridge, and the controller driver should figure out which port
> > > > needs to be recovered, or the controller driver can have its own loop
> > > > to recover all of them if it can't figure out which one needs it.
> > > > 
> > > 
> > > This should also work. Feel free to drop the relevant commits for v6.16, I can
> > > resubmit them (including dw-rockchip after -rc1).
> > 
> > What is the current status of this?
> > 

Thanks for the nudge!

I couldn't respin the series as I lost access to the hardware I was testing on
due to job change. I'll figure out a way to test it and respin it asap.

> > I assume that there is not much time left before 6.17 cut-off.

Mid of -rc5 is not that bad ;) Let's see how long it takes.

- Mani

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