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

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Date:	Fri, 18 Dec 2015 15:04:12 +0100
From:	Wolfram Sang <wsa@...-dreams.de>
To:	Phil Edworthy <phil.edworthy@...esas.com>
Cc:	Simon Horman <horms@...ge.net.au>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	Geert Uytterhoeven <geert@...ux-m68k.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
	"linux-sh@...r.kernel.org" <linux-sh@...r.kernel.org>
Subject: Re: [PATCH 2/4] PCI: rcar: Support runtime PM link state L1 handling
 in pcie-rcar


> 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.


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