diff options
Diffstat (limited to 'cpukit/libpci')
| -rw-r--r-- | cpukit/libpci/pci/cfg.h | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/cpukit/libpci/pci/cfg.h b/cpukit/libpci/pci/cfg.h index 18c48db5c2..8869a512af 100644 --- a/cpukit/libpci/pci/cfg.h +++ b/cpukit/libpci/pci/cfg.h @@ -146,9 +146,12 @@ struct pci_res { uint32_t end; }; -/* Get Device from resource pointer */ +/* Get Device from resource pointer. bar is the index of the pci_dev.resources + * array and used to get the device base address of which the resource is + * associated with. + */ #define RES2DEV(res) ((struct pci_dev *) \ - ((void *)res - (res->bar * (sizeof(struct pci_res))))) + ((uintptr_t)res - (uintptr_t)(res->bar * (sizeof(struct pci_res))))) /* Device flags */ #define PCI_DEV_BRIDGE 0x01 /* Device is a Bridge (struct pci_bus) */ |