[PATCH] pci/quirks: ITE 8893 needs quirk_use_pcie_bridge_dma_alias

[Jarod Wilson]

This bridge has the same problems as the ITE 8892, which were resulting in
crippling an older PCI 1Gbps NIC down to 45Mbps throughput with IOMMU and
VT-d enabled. With the patch, this old e1000 goes back up to ~900Mbps.

Suggested-by: Alex Williamson <alex.williamson@xxxxxxxxxx>
CC: linux-pci@xxxxxxxxxxxxxxx
CC: Alex Williamson <alex.williamson@xxxxxxxxxx>
CC: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
Signed-off-by: Jarod Wilson <jarod@xxxxxxxxxx>
---
 drivers/pci/quirks.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index 9236e40ac055..c95fbf2431f8 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -3914,6 +3914,8 @@ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_ASMEDIA, 0x1080,
 DECLARE_PCI_FIXUP_HEADER(0x10e3, 0x8113, quirk_use_pcie_bridge_dma_alias);
 /* ITE 8892, https://bugzilla.kernel.org/show_bug.cgi?id=73551 */
 DECLARE_PCI_FIXUP_HEADER(0x1283, 0x8892, quirk_use_pcie_bridge_dma_alias);
+/* ITE 8893 has the same problem as the 8892 */
+DECLARE_PCI_FIXUP_HEADER(0x1283, 0x8893, quirk_use_pcie_bridge_dma_alias);
 /* Intel 82801, https://bugzilla.kernel.org/show_bug.cgi?id=44881#c49 */
 DECLARE_PCI_FIXUP_HEADER(0x8086, 0x244e, quirk_use_pcie_bridge_dma_alias);
 
-- 
2.12.1