diff options
Diffstat (limited to 'src/arch/x86/core')
| -rw-r--r-- | src/arch/x86/core/pcidirect.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/src/arch/x86/core/pcidirect.c b/src/arch/x86/core/pcidirect.c index 9b8e6b1d..0d09be84 100644 --- a/src/arch/x86/core/pcidirect.c +++ b/src/arch/x86/core/pcidirect.c @@ -36,10 +36,12 @@ FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL ); * Prepare for Type 1 PCI configuration space access * * @v pci PCI device - * @v where Location within PCI configuration space + * @v where Location within PCI configuration space */ void pcidirect_prepare ( struct pci_device *pci, int where ) { - outl ( ( 0x80000000 | ( pci->busdevfn << 8 ) | ( where & ~3 ) ), + uint16_t busdevfn = ( pci->busdevfn & 0xffff ); + + outl ( ( 0x80000000 | ( busdevfn << 8 ) | ( where & ~3 ) ), PCIDIRECT_CONFIG_ADDRESS ); } |