diff options
| author | Krzysztof Wilczyński <kwilczynski@kernel.org> | 2026-05-08 04:35:40 +0000 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2026-06-23 15:19:09 -0500 |
| commit | 574b5470f8d43c85bf3dcb8c48efc2788a2bfb0c (patch) | |
| tree | cbf01053f58b8ab025be5a226f7b14e1d11e1c94 /drivers | |
| parent | 385ec1d40756e3bcb868814e305089b4edd32149 (diff) | |
PCI/sysfs: Add __weak pci_legacy_has_sparse() helper
Currently, Alpha's sparse/dense legacy attribute handling is done via
pci_adjust_legacy_attr(), which updates dynamically allocated attributes at
runtime. The upcoming conversion to static attributes needs a way to
determine sparse support at visibility check time.
Add a __weak pci_legacy_has_sparse() that returns false by default. Alpha
overrides it to check has_sparse() on the bus host controller.
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Tested-by: Shivaprasad G Bhat <sbhat@linux.ibm.com>
Link: https://patch.msgid.link/20260508043543.217179-22-kwilczynski@kernel.org
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/pci/pci-sysfs.c | 6 | ||||
| -rw-r--r-- | drivers/pci/pci.h | 4 |
2 files changed, 10 insertions, 0 deletions
diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c index 1e60f072f746..c1ba706844c9 100644 --- a/drivers/pci/pci-sysfs.c +++ b/drivers/pci/pci-sysfs.c @@ -983,6 +983,12 @@ static int pci_mmap_legacy_io(struct file *filp, struct kobject *kobj, return pci_mmap_legacy_page_range(bus, vma, pci_mmap_io); } +bool __weak pci_legacy_has_sparse(struct pci_bus *bus, + enum pci_mmap_state type) +{ + return false; +} + /** * pci_adjust_legacy_attr - adjustment of legacy file attributes * @b: bus to create files under diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h index 71a1fde1e505..c64c7f5f0bcf 100644 --- a/drivers/pci/pci.h +++ b/drivers/pci/pci.h @@ -392,6 +392,10 @@ static inline int pci_no_d1d2(struct pci_dev *dev) } +#ifdef HAVE_PCI_LEGACY +bool pci_legacy_has_sparse(struct pci_bus *bus, enum pci_mmap_state type); +#endif + #ifdef CONFIG_SYSFS extern const struct attribute_group *pci_dev_groups[]; extern const struct attribute_group *pci_dev_attr_groups[]; |