Commit 823576c8 authored by Bjorn Helgaas's avatar Bjorn Helgaas
Browse files

PCI/ASPM: Avoid L0s and L1 on PA Semi [1959:a002] Root Ports 



Christian reported that f3ac2ff1 ("PCI/ASPM: Enable all ClockPM and
ASPM states for devicetree platforms") broke booting on the A-EON AmigaOne
X1000.

Override the L0s and L1 Support advertised in Link Capabilities by the
X1000 Root Ports ([1959:a002]) so we don't try to enable those states.

Fixes: f3ac2ff1 ("PCI/ASPM: Enable all ClockPM and ASPM states for devicetree platforms")
Fixes: df5192d9 ("PCI/ASPM: Enable only L0s and L1 for devicetree platforms")
Reported-by: default avatarChristian Zigotzky <chzigotzky@xenosoft.de>
Link: https://lore.kernel.org/r/a41d2ca1-fcd9-c416-b111-a958e92e94bf@xenosoft.de


Signed-off-by: default avatarBjorn Helgaas <bhelgaas@google.com>
parent 5b40a508

drivers/pci/quirks.c

+1 −0
Original line number Diff line number Diff line
@@ -2524,6 +2524,7 @@ static void quirk_disable_aspm_l0s_l1(struct pci_dev *dev) 
 */

DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_ASMEDIA, 0x1080, quirk_disable_aspm_l0s_l1);

DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_FREESCALE, 0x0451, quirk_disable_aspm_l0s_l1);

DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_PASEMI, 0xa002, quirk_disable_aspm_l0s_l1);



/*

 * Some Pericom PCIe-to-PCI bridges in reverse mode need the PCIe Retrain