From 3587e625fe24a2d1cd1891fc660c3313151a368c Mon Sep 17 00:00:00 2001 From: Marti Raudsepp Date: Thu, 2 Oct 2014 08:50:31 -0600 Subject: [PATCH] PCI: Add ACS quirk for AMD A88X southbridge devices AMD has confirmed that peer-to-peer between two southbridge functions does not occur. Add a quirk to indicate that these functions are isolated even though they don't have an ACS capability. Link: https://bugzilla.kernel.org/show_bug.cgi?id=81841 Signed-off-by: Marti Raudsepp Signed-off-by: Bjorn Helgaas Acked-by: Joel Schopp --- drivers/pci/quirks.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c index 322d577503bd..b1349b4dfb70 100644 --- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -3533,6 +3533,11 @@ DECLARE_PCI_FIXUP_HEADER(0x8086, 0x244e, quirk_use_pcie_bridge_dma_alias); * 1002:439d SB7x0/SB8x0/SB9x0 LPC host controller * 1002:4384 SBx00 PCI to PCI Bridge * 1002:4399 SB7x0/SB8x0/SB9x0 USB OHCI2 Controller + * + * https://bugzilla.kernel.org/show_bug.cgi?id=81841#c15 + * + * 1022:780f [AMD] FCH PCI Bridge + * 1022:7809 [AMD] FCH USB OHCI Controller */ static int pci_quirk_amd_sb_acs(struct pci_dev *dev, u16 acs_flags) { @@ -3643,6 +3648,8 @@ static const struct pci_dev_acs_enabled { { PCI_VENDOR_ID_ATI, 0x439d, pci_quirk_amd_sb_acs }, { PCI_VENDOR_ID_ATI, 0x4384, pci_quirk_amd_sb_acs }, { PCI_VENDOR_ID_ATI, 0x4399, pci_quirk_amd_sb_acs }, + { PCI_VENDOR_ID_AMD, 0x780f, pci_quirk_amd_sb_acs }, + { PCI_VENDOR_ID_AMD, 0x7809, pci_quirk_amd_sb_acs }, { PCI_VENDOR_ID_SOLARFLARE, 0x0903, pci_quirk_mf_endpoint_acs }, { PCI_VENDOR_ID_SOLARFLARE, 0x0923, pci_quirk_mf_endpoint_acs }, { PCI_VENDOR_ID_INTEL, 0x10C6, pci_quirk_mf_endpoint_acs }, -- 2.39.5