[PATCH v4 1/2] PCI: Introduce pci_clear/set_config_dword()
From: Hans Zhang <18255117159@163.com>
Date: 2025-08-18 16:15:18
Also in:
linux-pci, lkml
Subsystem:
pci subsystem, the rest · Maintainers:
Bjorn Helgaas, Linus Torvalds
Add helper functions to clear or set bits in PCI config space. These helpers reduce code duplication and improve readability for config space modifications by encapsulating common read-modify-write patterns. Signed-off-by: Hans Zhang <18255117159@163.com> --- include/linux/pci.h | 12 ++++++++++++ 1 file changed, 12 insertions(+)
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 59876de13860..bb0dba2b7aee 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h@@ -1341,6 +1341,18 @@ static inline int pcie_capability_clear_dword(struct pci_dev *dev, int pos, return pcie_capability_clear_and_set_dword(dev, pos, clear, 0); } +static inline void pci_clear_config_dword(const struct pci_dev *dev, int pos, + u32 clear) +{ + pci_clear_and_set_config_dword(dev, pos, clear, 0); +} + +static inline void pci_set_config_dword(const struct pci_dev *dev, int pos, + u32 set) +{ + pci_clear_and_set_config_dword(dev, pos, 0, set); +} + /* User-space driven config access */ int pci_user_read_config_byte(struct pci_dev *dev, int where, u8 *val); int pci_user_read_config_word(struct pci_dev *dev, int where, u16 *val);
--
2.25.1