linux-kernel - Re: [PATCH v3 1/6] PCI: designware: remove wrong io

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Message-ID: <6899049.45pKpnsxmL@wuerfel>
Date:	Mon, 23 Nov 2015 17:40:56 +0100
From:	Arnd Bergmann <arnd@...db.de>
To:	Stanimir Varbanov <stanimir.varbanov@...aro.org>
Cc:	Gabriele Paoloni <gabriele.paoloni@...wei.com>,
	"linux-arm-msm@...r.kernel.org" <linux-arm-msm@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
	Rob Herring <robh+dt@...nel.org>,
	Rob Herring <robh@...nel.org>,
	Mark Rutland <mark.rutland@....com>,
	Pawel Moll <pawel.moll@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Jingoo Han <jingoohan1@...il.com>,
	Pratyush Anand <pratyush.anand@...il.com>,
	Bjorn Andersson <bjorn.andersson@...ymobile.com>
Subject: Re: [PATCH v3 1/6] PCI: designware: remove wrong io_base assignment

On Monday 23 November 2015 18:23:47 Stanimir Varbanov wrote:
> >>
> >> Fixes: 0021d22b73d6 ("PCI: designware: Use of_pci_get_host_bridge_resources()
> >> to parse DT")
> >> Reviewed-by: Arnd Bergmann <arnd@...db.de>
> 
> I think the bug is introduced in:
> 
> cbce7900598c ("PCI: designware: Make driver arch-agnostic")
> 
> cause the io_base is correctly calculated in 0021d22b73d6, do you agree?


I think cbce7900598c just slightly changes the io_base value, but
it's still referring to a bus address, not a cpu address, both before
and after the patch.

0021d22b73d6 hower seems to remove the correct 'pp->io_base = range.cpu_addr;'
and replaces it with 'pp->io_base = pp->io->start;', so it's now in
the wrong address space.

	Arnd
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