linux-kernel - Re: [PATCH] PCI: Fix and amend express capability sizes

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Message-ID: <20170822164312.302874c6@w520.home>
Date:   Tue, 22 Aug 2017 16:43:12 -0600
From:   Alex Williamson <alex.williamson@...hat.com>
To:     Bjorn Helgaas <helgaas@...nel.org>
Cc:     linux-pci@...r.kernel.org, bhelgaas@...gle.com,
        eric.auger@...hat.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] PCI: Fix and amend express capability sizes

On Tue, 22 Aug 2017 16:05:01 -0500
Bjorn Helgaas <helgaas@...nel.org> wrote:

> On Thu, Aug 10, 2017 at 10:54:31AM -0600, Alex Williamson wrote:
> > PCI_CAP_EXP_ENDPOINT_SIZEOF_V1 defines the size of the PCIe express
> > capability structure for v1 devices with link, but we also have a need
> > in the vfio code for sizing the capability for devices without link,
> > such as root complex endpoints.  Create a separate define for this
> > ending the structure before the link fields.
> > 
> > Additionally, this reveals that PCI_CAP_EXP_ENDPOINT_SIZEOF_V2 is
> > currently incorrect, ending the capability length before the v2 link
> > fields.  Rename this to specify an RC endpoint (no link) capability
> > length and move PCI_CAP_EXP_ENDPOINT_SIZEOF_V2 to include the link
> > fields as we have for the v1 version.
> > 
> > Signed-off-by: Alex Williamson <alex.williamson@...hat.com>  
> 
> Applied with Eric's reviewed-by to pci/misc for v4.14, thanks!
> 
> I think there was an underscore missing here:
> 
> > -#define PCI_CAP_EXP_ENDPOINT_SIZEOF_V2	44	/* v2 endpoints end here */
> > +#define PCI_CAP_EXP_RC ENDPOINT_SIZEOF_V2	44	/* v2 endpoints without link end here */  

Urgh, not sure how that happened.  Thanks for the fixup!

Alex