diff options
| author | Hans Zhang <18255117159@163.com> | 2025-08-13 22:45:24 +0800 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2025-08-14 15:03:34 -0500 |
| commit | 37d1ade89606875c9cd6eb3b4ee416b7e1800fc4 (patch) | |
| tree | 32139f70a9a30f541bbe2bb9f3edf8bb4d8ed9e2 /include/uapi | |
| parent | 8f5ae30d69d7543eee0d70083daf4de8fe15d585 (diff) | |
PCI: Clean up __pci_find_next_cap_ttl() readability
Refactor the __pci_find_next_cap_ttl() to improve code clarity:
- Replace magic number 0x40 with PCI_STD_HEADER_SIZEOF.
- Use ALIGN_DOWN() for position alignment instead of manual bitmask.
- Extract PCI capability fields via FIELD_GET() with standardized masks.
- Add necessary headers (linux/align.h).
No functional changes intended.
Signed-off-by: Hans Zhang <18255117159@163.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Tested-by: Niklas Schnelle <schnelle@linux.ibm.com>
Acked-by: Manivannan Sadhasivam <mani@kernel.org>
Link: https://patch.msgid.link/20250813144529.303548-2-18255117159@163.com
Diffstat (limited to 'include/uapi')
| -rw-r--r-- | include/uapi/linux/pci_regs.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/uapi/linux/pci_regs.h b/include/uapi/linux/pci_regs.h index f5b17745de60..1bba99b46227 100644 --- a/include/uapi/linux/pci_regs.h +++ b/include/uapi/linux/pci_regs.h @@ -207,6 +207,9 @@ /* Capability lists */ +#define PCI_CAP_ID_MASK 0x00ff /* Capability ID mask */ +#define PCI_CAP_LIST_NEXT_MASK 0xff00 /* Next Capability Pointer mask */ + #define PCI_CAP_LIST_ID 0 /* Capability ID */ #define PCI_CAP_ID_PM 0x01 /* Power Management */ #define PCI_CAP_ID_AGP 0x02 /* Accelerated Graphics Port */ |