RE: [PATCH 2/4] PCI: rcar: Support runtime PM link state L1 handling in pcie-rcar

From	Phil Edworthy <phil.edworthy@renesas.com>
Newsgroups	linux.kernel
Subject	RE: [PATCH 2/4] PCI: rcar: Support runtime PM link state L1 handling in pcie-rcar
Date	2015-12-21 12:00 +0100
Message-ID	<qI6m7-5py-31@gated-at.bofh.it> (permalink)
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Hi Wolfram,

On 18 December 2015 14:04, Wolfram Sang wrote:
> > Since the hardware doesn't support hot plug, I believe this loop will
> > always exit very quickly. Unless someone has taken a hammer to the HW
> > of course.
> 
> I know what you mean. But since readl_poll_timeout() makes it easy, we
> should better be safe than sorry.
Hmm, I changed the code, but now it doesn't come out of suspend unless
sleep_us passed to readl_poll_timeout is 0. Any reason you can think of?

To test, I am just using:
Build the kernel with CONFIG_PM_DEBUG. 
echo platform > /sys/power/pm_test
echo N > /sys/module/printk/parameters/console_suspend
echo mem > /sys/power/state

Thanks
Phil
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Thread

[PATCH 2/4] PCI: rcar: Support runtime PM link state L1 handling in pcie-rcar Phil Edworthy <phil.edworthy@renesas.com> - 2015-12-17 14:30 +0100
  Re: [PATCH 2/4] PCI: rcar: Support runtime PM link state L1 handling  in pcie-rcar Wolfram Sang <wsa@the-dreams.de> - 2015-12-17 14:40 +0100
    Re: [PATCH 2/4] PCI: rcar: Support runtime PM link state L1 handling  in pcie-rcar Geert Uytterhoeven <geert@linux-m68k.org> - 2015-12-17 14:50 +0100
      RE: [PATCH 2/4] PCI: rcar: Support runtime PM link state L1 handling  in pcie-rcar Phil Edworthy <phil.edworthy@renesas.com> - 2015-12-18 14:50 +0100
    RE: [PATCH 2/4] PCI: rcar: Support runtime PM link state L1 handling  in pcie-rcar Phil Edworthy <phil.edworthy@renesas.com> - 2015-12-18 14:50 +0100
      Re: [PATCH 2/4] PCI: rcar: Support runtime PM link state L1 handling  in pcie-rcar Wolfram Sang <wsa@the-dreams.de> - 2015-12-18 15:10 +0100
        RE: [PATCH 2/4] PCI: rcar: Support runtime PM link state L1 handling  in pcie-rcar Phil Edworthy <phil.edworthy@renesas.com> - 2015-12-18 16:30 +0100
        RE: [PATCH 2/4] PCI: rcar: Support runtime PM link state L1 handling  in pcie-rcar Phil Edworthy <phil.edworthy@renesas.com> - 2015-12-21 12:00 +0100
          Re: [PATCH 2/4] PCI: rcar: Support runtime PM link state L1 handling  in pcie-rcar Geert Uytterhoeven <geert@linux-m68k.org> - 2015-12-21 14:20 +0100

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