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[PATCH] pci/quirks: ITE 8893 needs quirk_use_pcie_bridge_dma_alias

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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@redhat.com>
CC: linux-pci@vger.kernel.org
CC: Alex Williamson <alex.williamson@redhat.com>
CC: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Jarod Wilson <jarod@redhat.com>
---
 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

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[PATCH] pci/quirks: ITE 8893 needs quirk_use_pcie_bridge_dma_alias Jarod Wilson <jarod@redhat.com> - 2017-04-11 03:10 +0200
  Re: [PATCH] pci/quirks: ITE 8893 needs  quirk_use_pcie_bridge_dma_alias Alex Williamson <alex.williamson@redhat.com> - 2017-04-11 06:50 +0200
  Re: [PATCH] pci/quirks: ITE 8893 needs  quirk_use_pcie_bridge_dma_alias Bjorn Helgaas <helgaas@kernel.org> - 2017-04-12 19:40 +0200

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