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PCI/ASPM: Deallocate upstream link state even if device is not PCIe 

On PCI bus hotplug removal, pcie_aspm_exit_link_state() can potentially
skip parent devices that have link_state allocated.  Instead of exiting
early if a given device is not PCIe, check whether or not the device's
parent has link_state allocated.  This enables pcie_aspm_exit_link_state()
to properly clean up parent link_state when the last function in a slot
might not be PCIe.

Reported-by: Joe Lawrence <joe.lawrence@stratus.com>
Tested-by: Joe Lawrence <joe.lawrence@stratus.com>
Signed-off-by: Myron Stowe <myron.stowe@redhat.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
This commit is contained in:
Myron Stowe 2013-01-31 16:29:25 -07:00 committed by Bjorn Helgaas
parent d1c3ed669a
commit 84fb913c43
1 changed files with 1 additions and 4 deletions
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5
drivers/pci/pcie/aspm.c
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@ -634,10 +634,7 @@ void pcie_aspm_exit_link_state(struct pci_dev *pdev)
struct pci_dev *parent = pdev->bus->self; struct pci_dev *parent = pdev->bus->self;
struct pcie_link_state *link, *root, *parent_link; struct pcie_link_state *link, *root, *parent_link;
if (!pci_is_pcie(pdev) || !parent || !parent->link_state) if (!parent || !parent->link_state)
return;
if ((pci_pcie_type(parent) != PCI_EXP_TYPE_ROOT_PORT) &&
(pci_pcie_type(parent) != PCI_EXP_TYPE_DOWNSTREAM))
return; return;
down_read(&pci_bus_sem); down_read(&pci_bus_sem);