linux-kernel - Re: [3.16-rcX][pciehp][radeon] PCIe HotPlug conflicts with radeon GPU

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: <CAErSpo6zLY8RVAHnLe81jjOE8cxGzskjPq3HL7eZVOtC-WF6=w@mail.gmail.com>
Date:	Thu, 11 Sep 2014 16:26:21 -0600
From:	Bjorn Helgaas <bhelgaas@...gle.com>
To:	Shawn Starr <shawn.starr@...ers.com>
Cc:	Kernel development list <linux-kernel@...r.kernel.org>,
	"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>
Subject: Re: [3.16-rcX][pciehp][radeon] PCIe HotPlug conflicts with radeon GPU

[+cc linux-pci]

On Sat, Aug 2, 2014 at 10:02 AM, Shawn Starr <shawn.starr@...ers.com> wrote:
> Hello devs,
>
> There are two issues I am encountering with the PCIe Hotplug driver on my Lenovo Laptop (W500). I note this goes back further than 3.15.
>
> It is noted here:
> http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f244d8b623dae7a7bc695b0336f67729b95a9736
> https://bugzilla.kernel.org/show_bug.cgi?id=79701
>
> And my open bug here:
> https://bugzilla.kernel.org/show_bug.cgi?id=77261
>
> 1) If I enable the device to use both the integrated and discrete GPU, pciehp will decide to force unload radeon because it puts itself into a power saving state, fails back to the Intel integrated GPU in this case unless I tell radeon.ko to runpm=0 (no power management, then pciehp wont touch it).
>
> 2) If the Radeon GPU resets and you use pci_reset=1 for kernel module option, pciehp decides to force unload radeon even though the GPU is trying to setup after failing.
>
> Kernel I am using right now: 3.16.0-0.rc7.git3.1.fc21.x86_64 (about to boot into snapshot kernel-core-3.16.0-0.rc7.git4.1.fc21.x86_64)

Hi Shawn,

Thanks for the report and sorry that it got dropped.  But I see you're
cc'd on https://bugzilla.kernel.org/show_bug.cgi?id=79701, so you've
probably seen the work there.  If you can try out the patches I just
posted, that would be great.

Bjorn
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/