diff options
| author | Zhi Wang <zhiw@nvidia.com> | 2026-07-22 10:39:08 +0300 |
|---|---|---|
| committer | Danilo Krummrich <dakr@kernel.org> | 2026-07-23 14:20:24 +0200 |
| commit | 7cffd051ae546e8644bf9bf7410b63541f666845 (patch) | |
| tree | b4960adcd979b55fa0d0efc01a8ff4d1d788c3b4 /include/linux | |
| parent | 71d4e7233f235871b13553e504e591ace6b54373 (diff) | |
PCI/IOV: Return unsigned int from pci_sriov_get_totalvfs()
pci_sriov_get_totalvfs() reports a VF count, not an errno-style
status. It returns 0 when SR-IOV is unavailable or the device is not a
PF, and otherwise returns the PF's driver_max_VFs value.
driver_max_VFs is stored as a u16 in struct pci_sriov. It is derived
from the SR-IOV TotalVFs field or from a driver-provided limit, so the
implementation cannot return a negative value.
Change the declaration, CONFIG_PCI_IOV stub, and implementation to
return unsigned int.
Suggested-by: Alexandre Courbot <acourbot@nvidia.com>
Reviewed-by: Alexandre Courbot <acourbot@nvidia.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: David Laight <david.laight.linux@gmail.com>
Cc: Gary Guo <gary@garyguo.net>
Cc: linux-pci@vger.kernel.org
Link: https://lore.kernel.org/all/DJHPRE4TGGT8.BUTMYOF5YE05@nvidia.com/
Signed-off-by: Zhi Wang <zhiw@nvidia.com>
Link: https://patch.msgid.link/20260722073913.1807677-2-zhiw@nvidia.com
Signed-off-by: Danilo Krummrich <dakr@kernel.org>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/pci.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/include/linux/pci.h b/include/linux/pci.h index ebb5b9d76360..2b9c61de5f67 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -2569,7 +2569,7 @@ void pci_iov_remove_virtfn(struct pci_dev *dev, int id); int pci_num_vf(struct pci_dev *dev); int pci_vfs_assigned(struct pci_dev *dev); int pci_sriov_set_totalvfs(struct pci_dev *dev, u16 numvfs); -int pci_sriov_get_totalvfs(struct pci_dev *dev); +unsigned int pci_sriov_get_totalvfs(struct pci_dev *dev); int pci_sriov_configure_simple(struct pci_dev *dev, int nr_virtfn); resource_size_t pci_iov_resource_size(const struct pci_dev *dev, int resno); int pci_iov_vf_bar_set_size(struct pci_dev *dev, int resno, int size); @@ -2622,7 +2622,7 @@ static inline int pci_vfs_assigned(struct pci_dev *dev) { return 0; } static inline int pci_sriov_set_totalvfs(struct pci_dev *dev, u16 numvfs) { return 0; } -static inline int pci_sriov_get_totalvfs(struct pci_dev *dev) +static inline unsigned int pci_sriov_get_totalvfs(struct pci_dev *dev) { return 0; } #define pci_sriov_configure_simple NULL static inline resource_size_t pci_iov_resource_size(const struct pci_dev *dev, |