linux-kernel - Re: [PATCH v1 0/2] PCI: Probe for reset support earlier

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Date:   Mon, 19 Feb 2018 14:43:31 -0600
From:   Bjorn Helgaas <helgaas@...nel.org>
To:     linux-pci@...r.kernel.org
Cc:     Jayachandran Nair <Jayachandran.Nair@...ium.com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        linux-kernel@...r.kernel.org,
        Alex Williamson <alex.williamson@...hat.com>,
        Robert Richter <Robert.Richter@...ium.com>,
        Tom Vaden <tom.vaden@....com>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        George Cherian <george.cherian@...ium.com>
Subject: Re: [PATCH v1 0/2] PCI: Probe for reset support earlier

On Fri, Feb 16, 2018 at 04:50:03PM -0600, Bjorn Helgaas wrote:
> The PCI core currently uses a late_initcall to probe each device for
> whether it supports reset.  This is dangerous because a driver may have
> already claimed the device by this point, and the PCI core should not
> interfere with the driver by touching the device on its own.
> 
> These patches move the probe to be earlier, during enumeration, before a
> driver has a chance to claim the device.
> 
> ---
> 
> Bjorn Helgaas (2):
>       PCI: Probe for device reset support before driver claim
>       PCI: Remove redundant probes for device reset support
> 
> 
>  drivers/pci/pci-sysfs.c |    3 +--
>  drivers/pci/pci.c       |   15 ++++++---------
>  drivers/pci/probe.c     |    3 +++
>  3 files changed, 10 insertions(+), 11 deletions(-)

Applied both to pci/virtualization with Rafael's reviewed-by (and
update to comment to s/D3hot/D3/) for v4.17.