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

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Message-ID: <20140911222022.16809.57079.stgit@bhelgaas-glaptop2.roam.corp.google.com>
Date:	Thu, 11 Sep 2014 16:23:54 -0600
From:	Bjorn Helgaas <bhelgaas@...gle.com>
To:	linux-pci@...r.kernel.org
Cc:	SpacemanSpiff <a818958@...vm.com>,
	Rajat Jain <rajatxjain@...il.com>,
	Dave Airlie <airlied@...ux.ie>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	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: [PATCH 0/2] PCI: Ignore hotplug events for dual GPU systems

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.

---

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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