linux-kernel - Re: [PATCH] Documentation: PCI: pci-error-recovery: rearrange the general sequence

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Date:   Fri, 18 Jun 2021 17:21:32 +1000
From:   "Oliver O'Halloran" <oohall@...il.com>
To:     Wesley Sheng <wesley.sheng@....com>
Cc:     linasvepstas@...il.com, Russell Currey <ruscur@...sell.cc>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Jonathan Corbet <corbet@....net>,
        linux-pci <linux-pci@...r.kernel.org>,
        linuxppc-dev <linuxppc-dev@...ts.ozlabs.org>,
        linux-doc@...r.kernel.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        wesleyshenggit@...a.com
Subject: Re: [PATCH] Documentation: PCI: pci-error-recovery: rearrange the
 general sequence

On Fri, Jun 18, 2021 at 4:05 PM Wesley Sheng <wesley.sheng@....com> wrote:
>
> Reset_link() callback function was called before mmio_enabled() in
> pcie_do_recovery() function actually, so rearrange the general
> sequence betwen step 2 and step 3 accordingly.

I don't think this is true in all cases. If pcie_do_recovery() is
called with state==pci_channel_io_normal (i.e. non-fatal AER) the link
won't be reset. EEH (ppc PCI error recovery thing) also uses
.mmio_enabled() as described.