linux-kernel - Re: expresscard hotplug not working

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <4A9BC5FB.20000@rtr.ca>
Date:	Mon, 31 Aug 2009 08:45:47 -0400
From:	Mark Lord <lkml@....ca>
To:	Matthew Garrett <mjg59@...f.ucam.org>
Cc:	Mike Mohr <akihana@...il.com>, linux-kernel@...r.kernel.org
Subject: Re: expresscard hotplug not working

Mark Lord wrote:
> Matthew Garrett wrote:
>> On Thu, Aug 27, 2009 at 08:52:45AM -0400, Mark Lord wrote:
>>
>>> Just create a file called /etc/modprobe.d/pciehp,
>>> and stick this one line into it:
>>>
>>>   options pciehp pciehp_force=1
>>>
>>> See if that works.
>>
>> It's worth noting that Windows didn't support native pcie hotplug 
>> until Vista, and so any hardware that works with XP (ie, basically all 
>> of it, including Dells) is supposed to be using acpi hotplug instead. 
>> I've fixed one bug that led to acpiphp not working on some hardware, 
>> but if anyone's still running with pciehp_force=1 then please send me 
>> the output of acpidump so it can be fixed properly.
> ..
> 
> My Dell works fine with PCIe hotplug under XP,
> but not under Linux without pciehp_force=1.
> 
> I have not retested without that parameter for quite some time, though.
> What do I have to do to retest with "acpihp" ?
..

Okay, I figured it out.  Not very difficult, either.  :)

With acpiphp loaded, hotplug works on the ExpressCard slot
of my Dell i9400 notebook.  Well, it *mostly* works.

The part that is still b0rked is that inserted cards get
"forgotten" about over suspend/resume (RAM) cycles.

With pciehp + pciehp_force=1, everything works properly,
including keeping devices around over suspend/resume.

I am attaching the output of "acpidump -b | gzip" to this message.

Cheers


Download attachment "acpidump.out.gz" of type "application/x-gzip" (8851 bytes)