CONFIG_PCIEASPM breaks PCIe on Marvell Armada 385 machine

[linux@armlinux.org.uk (Russell King - ARM Linux)]

On Tue, Jan 17, 2017 at 05:51:16PM +0000, Russell King - ARM Linux wrote:
> On Tue, Jan 17, 2017 at 11:46:49AM -0600, Bjorn Helgaas wrote:
> > Uwe has already done that; the dmesg logs including this
> > instrumentation are at
> > https://bugzilla.kernel.org/show_bug.cgi?id=192441
> 
> Grr, <swears about SSL incompatibilities>... wget's the URL and then
> uses elinks on it...
> 
> Umm, not quite.  He's done mvebu_pcie_hw_wr_conf() and mvebu_pcie_hw_rd_conf()
> but not the bridge from the descriptions given on the attachments.
> Obviously, it's going to be a lot of work to manufacture the links to
> look at each attachment to thoroughly check, so I'm not going to do
> that given quite how broken SSL crap is today.
> 
> (Try installing elinks and pointing it at the above URL.)

Oh, and looking at some of the debug that's been added:

[    3.646322] mvebu_pcie_rd_conf(where=16, size=4, val=3892314116) => 0
[    3.646325] mvebu_pcie_wr_conf(where=16, size=4, val=4294967295)
[    3.646329] mvebu_pcie_rd_conf(where=16, size=4, val=4292870148) => 0
[    3.646332] mvebu_pcie_wr_conf(where=16, size=4, val=3892314116)

Please print register values in HEX, not decimal.  Same for register
addresses.  Hex is the normal base to print this information, which
the human brain can easily comprehend and translate to bits in a
register.  Decimal values are useless and might as well be encrypted.

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