5.15-stable review patch. If anyone has any objections, please let me know.
------------------
From: LeoLiuoc <LeoLiu-oc@xxxxxxxxxxx>
commit e367e3c765f5477b2e79da0f1399aed49e2d1e37 upstream.
Add more Root Port Device IDs to pci_quirk_zhaoxin_pcie_ports_acs() for
some new Zhaoxin platforms.
Fixes: 299bd044a6f3 ("PCI: Add ACS quirk for Zhaoxin Root/Downstream Ports")
Link: https://lore.kernel.org/r/20231211091543.735903-1-LeoLiu-oc@xxxxxxxxxxx
Signed-off-by: LeoLiuoc <LeoLiu-oc@xxxxxxxxxxx>
[bhelgaas: update subject, drop changelog, add Fixes, add stable tag, fix
whitespace, wrap code comment]
Signed-off-by: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx> # 5.7
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/pci/quirks.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -4577,17 +4577,21 @@ static int pci_quirk_xgene_acs(struct pc
* But the implementation could block peer-to-peer transactions between them
* and provide ACS-like functionality.
*/
-static int pci_quirk_zhaoxin_pcie_ports_acs(struct pci_dev *dev, u16 acs_flags)
+static int pci_quirk_zhaoxin_pcie_ports_acs(struct pci_dev *dev, u16 acs_flags)
{
if (!pci_is_pcie(dev) ||
((pci_pcie_type(dev) != PCI_EXP_TYPE_ROOT_PORT) &&
(pci_pcie_type(dev) != PCI_EXP_TYPE_DOWNSTREAM)))
return -ENOTTY;
+ /*
+ * Future Zhaoxin Root Ports and Switch Downstream Ports will
+ * implement ACS capability in accordance with the PCIe Spec.
+ */
switch (dev->device) {
case 0x0710 ... 0x071e:
case 0x0721:
- case 0x0723 ... 0x0732:
+ case 0x0723 ... 0x0752:
return pci_acs_ctrl_enabled(acs_flags,
PCI_ACS_SV | PCI_ACS_RR | PCI_ACS_CR | PCI_ACS_UF);
}
