[PATCH AUTOSEL 4.19 026/237] PCI: mediatek: Fix class type for MT7622 to PCI_CLASS_BRIDGE_PCI

Sasha Levin
2019-11-16T16:27:18Z

From: Honghui Zhang <honghui.zhang@mediatek.com>

[ Upstream commit a7f172ab6a8e755e60311f27512034b0441ef421 ]

commit 101c92dc80c8 ("PCI: mediatek: Set up vendor ID and class
type for MT7622") erroneously set the class type for MT7622 to
PCI_CLASS_BRIDGE_HOST.

The PCIe controller of MT7622 integrates a Root Port that has type 1
configuration space header and related bridge windows.

The HW default value of this bridge's class type is invalid.

Fix its class type and set it to PCI_CLASS_BRIDGE_PCI to
match the hardware implementation.

Fixes: 101c92dc80c8 ("PCI: mediatek: Set up vendor ID and class type for MT7622")
Signed-off-by: Honghui Zhang <honghui.zhang@mediatek.com>
[lorenzo.pieralisi@arm.com: reworked the commit log]
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: Ryder Lee <ryder.lee@mediatek.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/pci/controller/pcie-mediatek.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/pci/controller/pcie-mediatek.c b/drivers/pci/controller/pcie-mediatek.c
index c5ff6ca65eab2..abedf8ec11bba 100644
--- a/drivers/pci/controller/pcie-mediatek.c
+++ b/drivers/pci/controller/pcie-mediatek.c
@@ -432,7 +432,7 @@ static int mtk_pcie_startup_port_v2(struct mtk_pcie_port *port)
val = PCI_VENDOR_ID_MEDIATEK;
writew(val, port->base + PCIE_CONF_VEND_ID);

- val = PCI_CLASS_BRIDGE_HOST;
+ val = PCI_CLASS_BRIDGE_PCI;
writew(val, port->base + PCIE_CONF_CLASS_ID);
}

--
2.20.1