The QDF2400 controller does not set the Command Completed bit unless writes to the Slot Command register change "Control" bits. Command Completed is never set for writes that only change software notification "Enable" bits. This results in timeouts like this:
pciehp 0000:00:00.0:pcie004: Timeout on hotplug command 0x1038
Cc: stable@vger.kernel.org Signed-off-by: Sinan Kaya okaya@codeaurora.org --- drivers/pci/hotplug/pciehp_hpc.c | 6 ++++++ 1 file changed, 6 insertions(+)
diff --git a/drivers/pci/hotplug/pciehp_hpc.c b/drivers/pci/hotplug/pciehp_hpc.c index e70eba5..974a8f1 100644 --- a/drivers/pci/hotplug/pciehp_hpc.c +++ b/drivers/pci/hotplug/pciehp_hpc.c @@ -914,3 +914,9 @@ static void quirk_cmd_compl(struct pci_dev *pdev) } DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_INTEL, PCI_ANY_ID, PCI_CLASS_BRIDGE_PCI, 8, quirk_cmd_compl); + +DECLARE_PCI_FIXUP_CLASS_EARLY(0x17cb, 0x400, + PCI_CLASS_BRIDGE_PCI, 8, quirk_cmd_compl); + +DECLARE_PCI_FIXUP_CLASS_EARLY(0x17cb, 0x401, + PCI_CLASS_BRIDGE_PCI, 8, quirk_cmd_compl);