OpenWrt – Rev 3

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--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -2305,7 +2305,8 @@ 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
@@ -845,7 +845,7 @@ 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;