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| author | Shuai Xue <xueshuai@linux.alibaba.com> | 2023-12-08 10:56:50 +0800 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2023-12-13 13:35:41 +0000 |
| commit | ac16087134b837d42b75bb1c741070b6c142f258 (patch) | |
| tree | e075f97329c7dca7a2dd883818f3bb3a4274dec9 /drivers/pci/access.c | |
| parent | ad6534c626fedd818718d76c36d69c7d8e7b61cc (diff) | |
| download | lwn-ac16087134b837d42b75bb1c741070b6c142f258.tar.gz lwn-ac16087134b837d42b75bb1c741070b6c142f258.zip | |
PCI: Move pci_clear_and_set_dword() helper to PCI header
The clear and set pattern is commonly used for accessing PCI config,
move the helper pci_clear_and_set_dword() from aspm.c into PCI header.
In addition, rename to pci_clear_and_set_config_dword() to retain the
"config" information and match the other accessors.
No functional change intended.
Signed-off-by: Shuai Xue <xueshuai@linux.alibaba.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Tested-by: Ilkka Koskinen <ilkka@os.amperecomputing.com>
Link: https://lore.kernel.org/r/20231208025652.87192-4-xueshuai@linux.alibaba.com
Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'drivers/pci/access.c')
| -rw-r--r-- | drivers/pci/access.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/pci/access.c b/drivers/pci/access.c index 6554a2e89d36..6449056b57dd 100644 --- a/drivers/pci/access.c +++ b/drivers/pci/access.c @@ -598,3 +598,15 @@ int pci_write_config_dword(const struct pci_dev *dev, int where, return pci_bus_write_config_dword(dev->bus, dev->devfn, where, val); } EXPORT_SYMBOL(pci_write_config_dword); + +void pci_clear_and_set_config_dword(const struct pci_dev *dev, int pos, + u32 clear, u32 set) +{ + u32 val; + + pci_read_config_dword(dev, pos, &val); + val &= ~clear; + val |= set; + pci_write_config_dword(dev, pos, val); +} +EXPORT_SYMBOL(pci_clear_and_set_config_dword); |