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- --- a/drivers/pci/probe.c
- +++ b/drivers/pci/probe.c
- @@ -1938,7 +1938,8 @@ static void pcie_write_mrrs(struct pci_d
- /* In the "safe" case, do not configure the MRRS. There appear to be
- * issues with setting MRRS to 0 on a number of devices.
- */
- - if (pcie_bus_config != PCIE_BUS_PERFORMANCE)
- + if (pcie_bus_config != PCIE_BUS_PERFORMANCE &&
- + pcie_bus_config != PCIE_BUS_PEER2PEER)
- return;
-
- /* For Max performance, the MRRS must be set to the largest supported
- --- a/include/linux/pci.h
- +++ b/include/linux/pci.h
- @@ -757,7 +757,7 @@ enum pcie_bus_config_types {
- PCIE_BUS_DEFAULT, /* ensure MPS matches upstream bridge */
- PCIE_BUS_SAFE, /* use largest MPS boot-time devices support */
- PCIE_BUS_PERFORMANCE, /* use MPS and MRRS for best performance */
- - PCIE_BUS_PEER2PEER, /* set MPS = 128 for all devices */
- + PCIE_BUS_PEER2PEER, /* set MPS and MRSS to 128 for all devices */
- };
-
- extern enum pcie_bus_config_types pcie_bus_config;
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