diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index 453ff4856c63733b12c5936e71356950dccf77c0..9e91aeb070895fbb869862d943c62d6ffdcb72e1 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -410,6 +410,36 @@ static void loongson_pcie_msi_quirk(struct pci_dev *dev)
 }
 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_LOONGSON, 0x7a59, loongson_pcie_msi_quirk);
 
+#define DEV_PCIE_PORT_4	0x7a39
+#define DEV_PCIE_PORT_5	0x7a49
+#define DEV_PCIE_PORT_6	0x7a59
+#define DEV_PCIE_PORT_7	0x7a69
+static void loongson_d3_and_link_quirk(struct pci_dev *dev)
+{
+	struct pci_bus *bus = dev->bus;
+	struct pci_dev *bridge;
+	static const struct pci_device_id bridge_devids[] = {
+		{ PCI_VDEVICE(LOONGSON, DEV_PCIE_PORT_4) },
+		{ PCI_VDEVICE(LOONGSON, DEV_PCIE_PORT_5) },
+		{ PCI_VDEVICE(LOONGSON, DEV_PCIE_PORT_6) },
+		{ PCI_VDEVICE(LOONGSON, DEV_PCIE_PORT_7) },
+		{ 0, },
+	};
+
+	/* look for the matching bridge */
+	while (!pci_is_root_bus(bus)) {
+		bridge = bus->self;
+		bus = bus->parent;
+		if (bridge && pci_match_id(bridge_devids, bridge)) {
+			dev->dev_flags |= (PCI_DEV_FLAGS_NO_D3 |
+				PCI_DEV_FLAGS_NO_LINK_SPEED_CHANGE);
+			dev->no_d1d2 = 1;
+		break;
+		}
+	}
+}
+DECLARE_PCI_FIXUP_ENABLE(PCI_ANY_ID, PCI_ANY_ID, loongson_d3_and_link_quirk);
+
 /* Chipsets where PCI->PCI transfers vanish or hang */
 static void quirk_nopcipci(struct pci_dev *dev)
 {
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 4f2f2cd02aae57c8b7cfd1af064effdb39ded276..887fc11491801e503afb0f3abcdc984b69d31337 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -245,6 +245,7 @@ enum pci_dev_flags {
 	PCI_DEV_FLAGS_NO_RELAXED_ORDERING = (__force pci_dev_flags_t) (1 << 11),
 	/* Device does honor MSI masking despite saying otherwise */
 	PCI_DEV_FLAGS_HAS_MSI_MASKING = (__force pci_dev_flags_t) (1 << 12),
+	PCI_DEV_FLAGS_NO_LINK_SPEED_CHANGE = (__force pci_dev_flags_t) (1 << 15),
 };
 
 enum pci_irq_reroute_variant {