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authorRafael J. Wysocki <rjw@sisk.pl>2013-02-11 20:49:49 +0100
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2013-02-17 10:53:13 -0800
commit55a6e2303a0f88c3aec1f2ee34e14814041831b9 (patch)
tree9eae740834b641c8b75d8256ad388b9604a008e1
parentafb7b3a2bd406586ed4aebc1e159352e588b991e (diff)
PCI/PM: Clean up PME state when removing a device
commit 249bfb83cf8ba658955f0245ac3981d941f746ee upstream. 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> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--drivers/pci/remove.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/pci/remove.c b/drivers/pci/remove.c
index 513972f3ed13..6c5c7c5bcfe6 100644
--- a/drivers/pci/remove.c
+++ b/drivers/pci/remove.c
@@ -19,6 +19,8 @@ static void pci_free_resources(struct pci_dev *dev)
static void pci_stop_dev(struct pci_dev *dev)
{
+ pci_pme_active(dev, false);
+
if (dev->is_added) {
pci_proc_detach_device(dev);
pci_remove_sysfs_dev_files(dev);