commit 3587e625fe24a2d1cd1891fc660c3313151a368c
author Marti Raudsepp <marti@juffo.org> Thu Oct 02 08:50:31 2014 -0600
committer Bjorn Helgaas <bhelgaas@google.com> Thu Oct 02 08:50:31 2014 -0600
tree 1200f92fd3675818e363f15281e883ef619187d7
parent 100ebb2c48eaddd6a7ce9602d5d4c37f0a3c9232

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 <marti@juffo.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Joel Schopp <joel.schopp@amd.com>

drivers/pci/quirks.c

diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index 322d5775..b1349b4 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -3533,6 +3533,11 @@
  * 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 @@
 	{ 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 },