netdev - PATCH: i40e Improve trusted VF MAC addresses logging when limit is reached

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Message-ID:
 <CH3P221MB1462BC768A36BFE9E37E2CB6D327A@CH3P221MB1462.NAMP221.PROD.OUTLOOK.COM>
Date: Thu, 31 Jul 2025 10:06:40 -0400
From: Dave Hill <davidchill@...mail.com>
To: netdev@...r.kernel.org
Subject: PATCH: i40e Improve trusted VF MAC addresses logging when limit is
 reached

From: David Hill<dhill@...hat.com>

When a VF reaches the limit introduced in this commit [1], the host reports an error in the syslog but doesn't mention which VF reached its limit and what the limit is actually is which makes troubleshooting of networking issue a bit tedious.   This commit simply improves this error reporting by adding which VF number has reached a limit and what that limit is.

Signed-off-by: David Hill<dhill@...hat.com>

diff --git a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c 
b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c

index 9b8efdeafbcf..dc0e7a80d83a 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
@@ -2953,7 +2953,8 @@ static inline int i40e_check_vf_permission(struct 
i40e_vf *vf,
I40E_VC_MAX_MACVLAN_PER_TRUSTED_VF(pf->num_alloc_vfs,
hw->num_ports)) {
                         dev_err(&pf->pdev->dev,
-                               "Cannot add more MAC addresses, trusted 
VF exhausted it's resources\n");
+                               "Cannot add more MAC addresses, trusted 
VF %d uses %d out of %d MAC addresses\n", vf->vf_id, 
i40e_count_filters(vsi) +
+          mac2add_cnt, 
I40E_VC_MAX_MACVLAN_PER_TRUSTED_VF(pf->num_alloc_vfs,num_ports)));
                         return -EPERM;
                 }
         }

[1] commit cfb1d572c986a39fd288f48a6305d81e6f8d04a3
Author: Karen Sornek <karen.sornek@...el.com>
Date:   Thu Jun 17 09:19:26 2021 +0200