diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/interface/efi/efi_pci.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/src/interface/efi/efi_pci.c b/src/interface/efi/efi_pci.c index 033eae87c..86c781d82 100644 --- a/src/interface/efi/efi_pci.c +++ b/src/interface/efi/efi_pci.c @@ -59,7 +59,7 @@ FILE_LICENCE ( GPL2_OR_LATER ); /** PCI root bridge I/O protocol */ static EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *efipci; -EFI_REQUIRE_PROTOCOL ( EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL, &efipci ); +EFI_REQUEST_PROTOCOL ( EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL, &efipci ); static unsigned long efipci_address ( struct pci_device *pci, unsigned long location ) { @@ -74,6 +74,9 @@ int efipci_read ( struct pci_device *pci, unsigned long location, EFI_STATUS efirc; int rc; + if ( ! efipci ) + return -ENOTSUP; + if ( ( efirc = efipci->Pci.Read ( efipci, EFIPCI_WIDTH ( location ), efipci_address ( pci, location ), 1, value ) ) != 0 ) { @@ -92,6 +95,9 @@ int efipci_write ( struct pci_device *pci, unsigned long location, EFI_STATUS efirc; int rc; + if ( ! efipci ) + return -ENOTSUP; + if ( ( efirc = efipci->Pci.Write ( efipci, EFIPCI_WIDTH ( location ), efipci_address ( pci, location ), 1, &value ) ) != 0 ) { |