On Mon, 10 Apr 2017 21:01:27 -0400 Jarod Wilson <jarod@xxxxxxxxxx> wrote: > 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); Reviewed-by: Alex Williamson <alex.williamson@xxxxxxxxxx>
