dlan17/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

PCI: Clean up __pci_find_next_cap_ttl() readability

Browse Source 
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
This commit is contained in:
Hans Zhang
2025-08-14 15:03:34 -05:00
committed by Bjorn Helgaas
parent 8f5ae30d69
commit 37d1ade896
2 changed files with 8 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files
include/uapi/linux/pci_regs.h
+3
View File
@@ -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 */