The Dual Address Cycle Attribute is necessary for bus mastering PCI devices which are capable of generating 64-bit addresses. See the "Driver Writer's Guide for UEFI 2.3.1" version 1.01, section 18.3.2. --- Drivers/Net/MarvellYukonDxe/if_msk.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/Drivers/Net/MarvellYukonDxe/if_msk.c b/Drivers/Net/MarvellYukonDxe/if_msk.c index 3cab084..c05e51e 100644 --- a/Drivers/Net/MarvellYukonDxe/if_msk.c +++ b/Drivers/Net/MarvellYukonDxe/if_msk.c @@ -1160,7 +1160,7 @@ mskc_attach ( Status = mPciIo->Attributes ( mPciIo, EfiPciIoAttributeOperationEnable, - Supports, + Supports | EFI_PCI_IO_ATTRIBUTE_DUAL_ADDRESS_CYCLE, NULL ); }