path: root/drivers/block/xen-blkback
diff options
authorRafael J. Wysocki <rjw@sisk.pl>2013-02-11 20:49:49 +0100
committerBjorn Helgaas <bhelgaas@google.com>2013-02-13 11:58:02 -0700
commit249bfb83cf8ba658955f0245ac3981d941f746ee (patch)
treeb8ff98edba2c9803619345095ae4f519152d9ce6 /drivers/block/xen-blkback
parent444ee9bd3d0fa78317c6127c961af5accf50038b (diff)
PCI/PM: Clean up PME state when removing a device
Devices are added to pci_pme_list when drivers use pci_enable_wake() or pci_wake_from_d3(), but they aren't removed from the list unless the driver explicitly disables wakeup. Many drivers never disable wakeup, so their devices remain on the list even after they are removed, e.g., via hotplug. A subsequent PME poll will oops when it tries to touch the device. This patch disables PME# on a device before removing it, which removes the device from pci_pme_list. This is safe even if the device never had PME# enabled. This oops can be triggered by unplugging a Thunderbolt ethernet adapter on a Macbook Pro, as reported by Daniel below. [bhelgaas: changelog] Reference: http://lkml.kernel.org/r/CAMVG2svG21yiM1wkH4_2pen2n+cr2-Zv7TbH3Gj+8MwevZjDbw@mail.gmail.com Reported-and-tested-by: Daniel J Blueman <daniel@quora.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> CC: stable@vger.kernel.org
Diffstat (limited to 'drivers/block/xen-blkback')
0 files changed, 0 insertions, 0 deletions