[PATCH v4 1/2] PCI: Introduce pci_clear/set_config_dword()

[Hans Zhang]

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 at 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