Fintek F81504/508/512 PCIe-to-UART/GPIO will failed to work on Intel
Skylake platform PEG PCIe port after D0->D3->D0.
This patch will prevent it into D3 mode.
Signed-off-by: Ji-Ze Hong (Peter Hong) <hpeter+linux_kernel@xxxxxxxxx>
---
drivers/pci/quirks.c | 15 +++++++++++++++
1 file changed, 15 insertions(+)
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index 182712e..ee9402f 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -4497,3 +4497,18 @@ static void quirk_aer_report(struct pci_dev *pdev)
quirk_aer_report);
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_FINTEK, PCI_DEVICE_ID_F81512,
quirk_aer_report);
+
+/*
+ * Fintek F81504/508/512 PCIe-to-UART/GPIO will failed to work on Intel Skylake
+ * platform PEG PCIe port after D0->D3->D0.
+ */
+static void quirk_no_d3(struct pci_dev *pdev)
+{
+ pdev->dev_flags |= PCI_DEV_FLAGS_NO_D3;
+}
+DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_FINTEK, PCI_DEVICE_ID_F81504,
+ quirk_no_d3);
+DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_FINTEK, PCI_DEVICE_ID_F81508,
+ quirk_no_d3);
+DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_FINTEK, PCI_DEVICE_ID_F81512,
+ quirk_no_d3);
--
1.9.1
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