netdev - [PATCH net-next 6/8] ice: use pci_iov_vf

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Message-ID: <20250710214518.1824208-7-anthony.l.nguyen@intel.com>
Date: Thu, 10 Jul 2025 14:45:15 -0700
From: Tony Nguyen <anthony.l.nguyen@...el.com>
To: davem@...emloft.net,
	kuba@...nel.org,
	pabeni@...hat.com,
	edumazet@...gle.com,
	andrew+netdev@...n.ch,
	netdev@...r.kernel.org
Cc: Jacob Keller <jacob.e.keller@...el.com>,
	anthony.l.nguyen@...el.com,
	madhu.chittim@...el.com,
	yahui.cao@...el.com,
	przemyslaw.kitszel@...el.com,
	Rafal Romanowski <rafal.romanowski@...el.com>
Subject: [PATCH net-next 6/8] ice: use pci_iov_vf_id() to get VF ID

From: Jacob Keller <jacob.e.keller@...el.com>

The ice_sriov_set_msix_vec_count() obtains the VF device ID in a strange
way by iterating over the possible VF IDs and calling
pci_iov_virtfn_devfn to calculate the device and function combos and
compare them to the pdev->devfn.

This is unnecessary. The pci_iov_vf_id() helper already exists which does
the reverse calculation of pci_iov_virtfn_devfn(), which is much simpler
and avoids the loop construction. Use this instead.

Signed-off-by: Jacob Keller <jacob.e.keller@...el.com>
Reviewed-by: Przemek Kitszel <przemyslaw.kitszel@...el.com>
Tested-by: Rafal Romanowski <rafal.romanowski@...el.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@...el.com>
---
 drivers/net/ethernet/intel/ice/ice_sriov.c | 12 +++---------
 1 file changed, 3 insertions(+), 9 deletions(-)

diff --git a/drivers/net/ethernet/intel/ice/ice_sriov.c b/drivers/net/ethernet/intel/ice/ice_sriov.c
index 0e4dc1a5cff0..f88bfd2f3f00 100644
--- a/drivers/net/ethernet/intel/ice/ice_sriov.c
+++ b/drivers/net/ethernet/intel/ice/ice_sriov.c
@@ -952,17 +952,11 @@ int ice_sriov_set_msix_vec_count(struct pci_dev *vf_dev, int msix_vec_count)
 	if (msix_vec_count < ICE_MIN_INTR_PER_VF)
 		return -EINVAL;
 
-	/* Transition of PCI VF function number to function_id */
-	for (id = 0; id < pci_num_vf(pdev); id++) {
-		if (vf_dev->devfn == pci_iov_virtfn_devfn(pdev, id))
-			break;
-	}
-
-	if (id == pci_num_vf(pdev))
-		return -ENOENT;
+	id = pci_iov_vf_id(vf_dev);
+	if (id < 0)
+		return id;
 
 	vf = ice_get_vf_by_id(pf, id);
-
 	if (!vf)
 		return -ENOENT;
 
-- 
2.47.1