linux-kernel - Re: [PATCH] PCI: dwc/meson: do not fail on wait linkup timeout

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Message-ID: <20201119111201.GA19942@e121166-lin.cambridge.arm.com>
Date:   Thu, 19 Nov 2020 11:12:01 +0000
From:   Lorenzo Pieralisi <lorenzo.pieralisi@....com>
To:     Rob Herring <robh@...nel.org>
Cc:     Neil Armstrong <narmstrong@...libre.com>,
        Yue Wang <yue.wang@...ogic.com>,
        PCI <linux-pci@...r.kernel.org>,
        "open list:ARM/Amlogic Meson..." <linux-amlogic@...ts.infradead.org>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] PCI: dwc/meson: do not fail on wait linkup timeout

On Tue, Sep 22, 2020 at 11:30:30AM -0600, Rob Herring wrote:
> On Mon, Sep 21, 2020 at 1:50 AM Neil Armstrong <narmstrong@...libre.com> wrote:
> >
> > When establish link timeouts, probe fails but the error is unrelated since
> > the PCIe controller has been probed succesfully.
> >
> > Align with most of the other dw-pcie drivers and ignore return of
> > dw_pcie_wait_for_link() in the host_init callback.
> 
> I think all, not most DWC drivers should be aligned. Plus the code
> here is pretty much the same, so I'm working on moving all this to the
> common DWC code. Drivers that need to bring up the link will need to
> implement .start_link() (currently only used for EP mode). Most of the
> time that is just setting the LTSSM bit which Synopsys thought letting
> every vendor do their own register for was a good idea. Sigh.

Should I drop this patch then ?

Thanks,
Lorenzo