From: Thierry Reding <thierry.reding@gmail.com>
To: Arnd Bergmann <arnd@arndb.de>
Cc: Bjorn Helgaas <bhelgaas@google.com>,
Liviu Dudau <liviu.dudau@arm.com>,
Marc Zyngier <marc.zyngier@arm.com>,
linux-pci@vger.kernel.org, linux-tegra@vger.kernel.org
Subject: Re: [PATCH] PCI: tegra: Use physical range for I/O mapping
Date: Wed, 26 Nov 2014 21:18:03 +0100 [thread overview]
Message-ID: <20141126201758.GA19624@mithrandir> (raw)
In-Reply-To: <3072281.UjpXkitFjL@wuerfel>
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On Wed, Nov 26, 2014 at 05:55:05PM +0100, Arnd Bergmann wrote:
> On Wednesday 26 November 2014 17:21:37 Thierry Reding wrote:
> > -
> > + pci_add_resource_offset(&sys->resources, &pcie->pio, sys->io_offset);
> > pci_add_resource_offset(&sys->resources, &pcie->mem, sys->mem_offset);
> > pci_add_resource_offset(&sys->resources, &pcie->prefetch,
> > sys->mem_offset);
> >
>
> You don't set sys->io_offset anywhere, which is a bug if you have multiple
> instances of the PCI host in one system. In my draft patch, I was setting
> both io_offset and mem_offset for consistency, and while mem_offset would
> in practice be always zero (as discussed on IRC), the io_offset in fact has
> a realistic chance of being nonzero and you should definitely set it.
I was going to do that in a follow-up patch since it isn't needed to fix
this particular regression.
Thierry
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next prev parent reply other threads:[~2014-11-26 20:18 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-11-26 16:21 [PATCH] PCI: tegra: Use physical range for I/O mapping Thierry Reding
2014-11-26 16:55 ` Arnd Bergmann
2014-11-26 20:18 ` Thierry Reding [this message]
2014-11-26 20:30 ` Arnd Bergmann
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