linux-kernel - Re: [PATCH 0/2] PCI: Ignore hotplug events for dual GPU systems

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Message-ID: <1434331.0IZIM5O2Ci@vostro.rjw.lan>
Date:	Sun, 14 Sep 2014 20:04:40 +0200
From:	"Rafael J. Wysocki" <rjw@...ysocki.net>
To:	Bjorn Helgaas <bhelgaas@...gle.com>
Cc:	linux-pci@...r.kernel.org, SpacemanSpiff <a818958@...vm.com>,
	Rajat Jain <rajatxjain@...il.com>,
	Dave Airlie <airlied@...ux.ie>, linux-kernel@...r.kernel.org,
	linux-acpi@...r.kernel.org,
	Pali Rohár <pali.rohar@...il.com>,
	Alex Deucher <alexdeucher@...il.com>,
	"Jose P." <lbdkmjdf@...rklasers.com>
Subject: Re: [PATCH 0/2] PCI: Ignore hotplug events for dual GPU systems

On Thursday, September 11, 2014 04:23:54 PM Bjorn Helgaas wrote:
> These are intended to resolve problems on dual GPU systems where the radeon
> driver becomes unusable because of problems suspending or resuming a GPU.
> When the GPU is powered off, we may get hotplug remove events, and we 
> would normally unbind the driver and destroy the pci_dev.  But in this
> case, the radeon and nouveau drivers expect to remain bound to the device
> because it isn't really removable, and they may power it back on later.
> 
> Links to the bug reports in the patch changelogs.
> 
> I would like to get these into v3.17 if they seem reasonable.

Acked-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>

for both.

> ---
> 
> Bjorn Helgaas (2):
>       PCI: Add pci_ignore_hotplug() to ignore hotplug events for a device
>       ACPIPHP / radeon / nouveau: Remove acpi_bus_no_hotplug()
> 
> 
>  drivers/acpi/bus.c                           |   10 ----------
>  drivers/gpu/drm/nouveau/nouveau_acpi.c       |   16 ++--------------
>  drivers/gpu/drm/nouveau/nouveau_drm.c        |    1 +
>  drivers/gpu/drm/radeon/radeon_atpx_handler.c |   16 ++--------------
>  drivers/gpu/drm/radeon/radeon_drv.c          |    1 +
>  drivers/pci/hotplug/acpiphp_glue.c           |   16 ++++++----------
>  drivers/pci/hotplug/pciehp_hpc.c             |   12 ++++++++++++
>  include/acpi/acpi_bus.h                      |    4 +---
>  include/linux/pci.h                          |    6 ++++++
>  9 files changed, 31 insertions(+), 51 deletions(-)
> --
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-- 
I speak only for myself.
Rafael J. Wysocki, Intel Open Source Technology Center.
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