Re: 3.8.0-rc4+ - Oops on removing WinTV-HVR-1400 expresscard TV Tuner

From: Chris Clayton <chris2553@googlemail.com>
To: Martin Mokrejs <mmokrejs@fold.natur.cuni.cz>
Cc: linux-media@vger.kernel.org, LKML <linux-kernel@vger.kernel.org>,
	linux-pci@vger.kernel.org
Subject: Re: 3.8.0-rc4+ - Oops on removing WinTV-HVR-1400 expresscard TV Tuner
Date: Sat, 26 Jan 2013 20:54:21 +0000	[thread overview]
Message-ID: <5104427D.2050002@googlemail.com> (raw)
In-Reply-To: <510189B1.606@fold.natur.cuni.cz>

Hi Martin,

On 01/24/13 19:21, Martin Mokrejs wrote:
> Hi Chris,
>    try to include in kernel only acpiphp and omit pciehp. Don't use modules but include
> them statically. And try, in addition, check whether "pcie_aspm=off" in grub.conf helped.
>

Thanks for the tip. I had the pciehp driver installed, but it was a 
module and not loaded. I didn't have acpiphp enabled at all. Building 
them both in statically, appears to have papered over the cracks of the 
oops :-)

>    The best would if you subscribe to linux-pci, and read my recent threads
> about similar issues I had with express cards with Dell Vostro 3550. Further, there is
> a lot of changes to PCI hotplug done by Yingahi Liu and Rafael Wysockij, just browse the
> archives of linux-pci and see the pacthes and the discussion.

Those discussions are way above my level of knowledge. I guess all this 
work will be merged into mainline in due course, so I'll watch for them 
in 3.9 or later. Unless, of course, there is a tree I could clone and 
help test the changes with my laptop and expresscard.

Hotplug isn't working at all on my Fujitsu laptop, so I can only get the 
card recognised by rebooting with the card inserted (or by writing 1 
to/sys/bus/pci/rescan). There seem to be a few reports on this in the 
kernel bugzilla, so I'll look through them and see what's being done.

Thanks again.

Chris

> Martin
>
> Chris Clayton wrote:
>> Hi,
>>
>> I've today taken delivery of a WinTV-HVR-1400 expresscard TV Tuner and got an Oops when I removed from the expresscard slot in my laptop. I will quite understand if the response to this report is "don't do that!", but in that case, how should one remove one of these cards?
>>
>> I have attached three files:
>>
>> 1. the dmesg output from when I rebooted the machine after the oops. I have turned debugging on in the dib700p and cx23885 modules via modules options in /etc/modprobe.d/hvr1400.conf;
>>
>> 2. the .config file for the kernel that oopsed.
>>
>> 3. the text of the oops message. I've typed this up from a photograph of the screen because the laptop was locked up and there was nothing in the log files. Apologies for any typos, but I have tried to be careful.
>>
>> Assuming the answer isn't don't do that, let me know if I can provide any additional diagnostics, test any patches, etc. Please, however, cc me as I'm not subscribed.
>>
>> Chris