PCI/IOV: Return unsigned int from pci_sriov_get_totalvfs()

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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>

...

This commit is contained in:

Zhi Wang 2026-07-22 10:39:08 +03:00 • committed by Danilo Krummrich

parent 71d4e7233f

commit 7cffd051ae

2 changed files with 3 additions and 3 deletions

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2

drivers/pci/iov.c

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4

include/linux/pci.h

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