linux-kernel - Re: 3.2.11: PCI Express card cannot be re-detected withing cca 60sec timeframe

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Message-ID: <CAE9FiQUk8D20mEFPE0ahwfigbEOHpbRp-X0wt4DC+293msw=4Q@mail.gmail.com>
Date:	Thu, 19 Apr 2012 19:06:55 -0700
From:	Yinghai Lu <yinghai@...nel.org>
To:	Martin Mokrejs <mmokrejs@...d.natur.cuni.cz>
Cc:	linux-pci@...r.kernel.org,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: 3.2.11: PCI Express card cannot be re-detected withing cca 60sec timeframe

On Thu, Apr 19, 2012 at 2:48 PM, Yinghai Lu <yinghai@...nel.org> wrote:
> On Thu, Apr 19, 2012 at 4:16 PM, Martin Mokrejs
>> I just tried something similar under linux, with all the patches I accumulated for 3.4-rc3
>> and posted in my previous emails. It seems linux flips some value so on every second card
>> removal it really does realize it was just unplugged.
> ...
>
> that is really looks like silicon problem.
>

please check attached patch. Hope link change bit is flip around...
if there is change, we could add some logic:
   check if the device is there, or will reset link to normal state.

Yinghai

Download attachment "link_change_report.patch" of type "application/octet-stream" (2328 bytes)