netdev - [PATCH net-next 03/11] bnxt_en: Optimize bnxt_sriov

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Message-ID: <20250915030505.1803478-4-michael.chan@broadcom.com>
Date: Sun, 14 Sep 2025 20:04:57 -0700
From: Michael Chan <michael.chan@...adcom.com>
To: davem@...emloft.net
Cc: netdev@...r.kernel.org,
	edumazet@...gle.com,
	kuba@...nel.org,
	pabeni@...hat.com,
	andrew+netdev@...n.ch,
	pavan.chebbi@...adcom.com,
	andrew.gospodarek@...adcom.com,
	Kalesh AP <kalesh-anakkur.purayil@...adcom.com>,
	Somnath Kotur <somnath.kotur@...adcom.com>
Subject: [PATCH net-next 03/11] bnxt_en: Optimize bnxt_sriov_disable()

From: Kalesh AP <kalesh-anakkur.purayil@...adcom.com>

bnxt_sriov_disable() is invoked from 2 places:

1. When the user deletes the VFs.
2. During the unload of the PF driver instance.

Inside bnxt_sriov_disable(), driver invokes
bnxt_restore_pf_fw_resources() which in turn causes a close/open_nic().
There is no harm doing this in the unload path, although it is inefficient
and unnecessary.

Optimize the function to make it more efficient.

Reviewed-by: Somnath Kotur <somnath.kotur@...adcom.com>
Reviewed-by: Pavan Chebbi <pavan.chebbi@...adcom.com>
Signed-off-by: Kalesh AP <kalesh-anakkur.purayil@...adcom.com>
Signed-off-by: Michael Chan <michael.chan@...adcom.com>
---
 drivers/net/ethernet/broadcom/bnxt/bnxt.c       |  2 +-
 drivers/net/ethernet/broadcom/bnxt/bnxt_sriov.c | 12 ++++++++++--
 drivers/net/ethernet/broadcom/bnxt/bnxt_sriov.h |  2 +-
 3 files changed, 12 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index 5f4f4d99f1e7..a74b50130cc0 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -16156,7 +16156,7 @@ static void bnxt_remove_one(struct pci_dev *pdev)
 	struct bnxt *bp = netdev_priv(dev);
 
 	if (BNXT_PF(bp))
-		bnxt_sriov_disable(bp);
+		__bnxt_sriov_disable(bp);
 
 	bnxt_rdma_aux_device_del(bp);
 
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_sriov.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_sriov.c
index 480e18a32caa..e7fbfeb1a387 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt_sriov.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_sriov.c
@@ -919,7 +919,7 @@ static int bnxt_sriov_enable(struct bnxt *bp, int *num_vfs)
 	return rc;
 }
 
-void bnxt_sriov_disable(struct bnxt *bp)
+void __bnxt_sriov_disable(struct bnxt *bp)
 {
 	u16 num_vfs = pci_num_vf(bp->pdev);
 
@@ -943,6 +943,14 @@ void bnxt_sriov_disable(struct bnxt *bp)
 	devl_unlock(bp->dl);
 
 	bnxt_free_vf_resources(bp);
+}
+
+static void bnxt_sriov_disable(struct bnxt *bp)
+{
+	if (!pci_num_vf(bp->pdev))
+		return;
+
+	__bnxt_sriov_disable(bp);
 
 	/* Reclaim all resources for the PF. */
 	rtnl_lock();
@@ -1321,7 +1329,7 @@ int bnxt_cfg_hw_sriov(struct bnxt *bp, int *num_vfs, bool reset)
 	return 0;
 }
 
-void bnxt_sriov_disable(struct bnxt *bp)
+void __bnxt_sriov_disable(struct bnxt *bp)
 {
 }
 
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_sriov.h b/drivers/net/ethernet/broadcom/bnxt/bnxt_sriov.h
index 9a4bacba477b..e4979d729312 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt_sriov.h
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_sriov.h
@@ -38,7 +38,7 @@ bool bnxt_is_trusted_vf(struct bnxt *bp, struct bnxt_vf_info *vf);
 int bnxt_set_vf_trust(struct net_device *dev, int vf_id, bool trust);
 int bnxt_sriov_configure(struct pci_dev *pdev, int num_vfs);
 int bnxt_cfg_hw_sriov(struct bnxt *bp, int *num_vfs, bool reset);
-void bnxt_sriov_disable(struct bnxt *);
+void __bnxt_sriov_disable(struct bnxt *bp);
 void bnxt_hwrm_exec_fwd_req(struct bnxt *);
 void bnxt_update_vf_mac(struct bnxt *);
 int bnxt_approve_mac(struct bnxt *, const u8 *, bool);
-- 
2.51.0