linux-kernel - Re: [PATCH v3 0/3] PCI: apple: Assorted #PERST fixes

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Message-ID: <20211207101621.GA466@lpieralisi>
Date:   Tue, 7 Dec 2021 10:16:32 +0000
From:   Lorenzo Pieralisi <lorenzo.pieralisi@....com>
To:     Marc Zyngier <maz@...nel.org>, Bjorn Helgaas <bhelgaas@...gle.com>
Cc:     linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-pci@...r.kernel.org,
        Pali Rohár <pali@...nel.org>,
        Alyssa Rosenzweig <alyssa@...enzweig.io>,
        Mark Kettenis <mark.kettenis@...all.nl>,
        Luca Ceresoli <luca@...aceresoli.net>, kernel-team@...roid.com
Subject: Re: [PATCH v3 0/3] PCI: apple: Assorted #PERST fixes

On Tue, Nov 30, 2021 at 11:56:32AM +0000, Lorenzo Pieralisi wrote:
> On Tue, Nov 23, 2021 at 06:06:33PM +0000, Marc Zyngier wrote:
> > Apologies for the rapid fire (I tend to be much more conservative when
> > resending series), but given that this series has a direct impact on
> > other projects (such as u-boot), I'm trying to converge as quickly as
> > possible.
> > 
> > This series aims at fixing a number of issues for the recently merged
> > Apple PCIe driver, all revolving around the mishandling of #PERST:
> > 
> > - we didn't properly drive #PERST, and we didn't follow the specified
> >   timings
> >   
> > - the DT had the wrong polarity, which has impacts on the driver
> >   itself
> > 
> > Hopefully, this should address all the issues reported so far.
> > 
> > * From v2:
> >   - Fixed DT
> >   - Fixed #PERST polarity in the driver
> >   - Collected Pali's ack on patch #1
> > 
> > [1] https://lore.kernel.org/r/20211122104156.518063-1-maz@kernel.org
> > 
> > Marc Zyngier (3):
> >   PCI: apple: Follow the PCIe specifications when resetting the port
> >   arm64: dts: apple: t8103: Fix PCIe #PERST polarity
> >   PCI: apple: Fix #PERST polarity
> > 
> >  arch/arm64/boot/dts/apple/t8103.dtsi |  7 ++++---
> >  drivers/pci/controller/pcie-apple.c  | 12 +++++++++++-
> >  2 files changed, 15 insertions(+), 4 deletions(-)
> 
> Hi Bjorn,
> 
> this series is v5.16-rcX material for PCI fixes, can you pick patches
> 1,3 up please ?

Hi Bjorn,

Arnd acked patch 2, can we send the whole series upstream for one
of the upcoming -rcX please ? It is fixing code that was merged
in the last merge window.

Thanks,
Lorenzo