Re: [PATCH net-next] i40e: Avoid repeating RX filter warning

[Tony Nguyen <anthony.l.nguyen@intel.com>]

On 7/29/2026 4:53 PM, Chris Packham wrote:
> Hi All,
> 
> On 14/05/2026 12:37, Chris Packham wrote:
>> When the i40e runs out of space for RX filters the driver switches to
>> promiscuous mode and warns that it has done so. In scenarios with a
>> large number of these filters this can generate a lot of warnings. For
>> example:
>>
>>     $ dmesg -c > /dev/null
>>     $ ip link add dev br0 type bridge vlan_filtering 1 vlan_default_pvid 1
>>     $ ip link set dev eth7 master br0
>>     $ bridge vlan add vid 1 dev eth7 pvid untagged self
>>     $ bridge vlan add vid 2-4094 dev eth7 tagged
>>     $ dmesg
>>     [   25.601705] i40e 0000:01:00.1: Error LIBIE_AQ_RC_ENOSPC, forcing overflow promiscuous on PF
>>     [   25.601833] i40e 0000:01:00.1: Error LIBIE_AQ_RC_ENOSPC, forcing overflow promiscuous on PF
>>     [   25.601961] i40e 0000:01:00.1: Error LIBIE_AQ_RC_ENOSPC, forcing overflow promiscuous on PF
>>     [   25.602088] i40e 0000:01:00.1: Error LIBIE_AQ_RC_ENOSPC, forcing overflow promiscuous on PF
>>     [   25.602216] i40e 0000:01:00.1: Error LIBIE_AQ_RC_ENOSPC, forcing overflow promiscuous on PF
>>     [   25.602344] i40e 0000:01:00.1: Error LIBIE_AQ_RC_ENOSPC, forcing overflow promiscuous on PF
>>     ...
>>
>> Use test_and_set_bit() so that the warning is only issued when the
>> driver enables promiscuous mode and not on the addition of subsequent RX
>> filters.
>>
>> Signed-off-by: Chris Packham <chris.packham@alliedtelesis.co.nz>
>> ---
>>
>> Resend with net-next tag
> 
> Has this fallen through the cracks? I've seen some Reviewed-bys but it
> doesn't seem to have been picked up.

Hi Chris,

I have it in my queue of patches to send out but I'm working my way to 
it. I do hope to have it sent on soon.

Thanks,
Tony

>>
>>    drivers/net/ethernet/intel/i40e/i40e_main.c | 18 ++++++++++--------
>>    1 file changed, 10 insertions(+), 8 deletions(-)
>>
>> diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c
>> index 926d001b2150..8741990b5a5e 100644
>> --- a/drivers/net/ethernet/intel/i40e/i40e_main.c
>> +++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
>> @@ -2408,10 +2408,11 @@ void i40e_aqc_add_filters(struct i40e_vsi *vsi, const char *vsi_name,
>>    
>>    	if (fcnt != num_add) {
>>    		if (vsi->type == I40E_VSI_MAIN) {
>> -			set_bit(__I40E_VSI_OVERFLOW_PROMISC, vsi->state);
>> -			dev_warn(&vsi->back->pdev->dev,
>> -				 "Error %s adding RX filters on %s, promiscuous mode forced on\n",
>> -				 libie_aq_str(aq_status), vsi_name);
>> +			if (!test_and_set_bit(__I40E_VSI_OVERFLOW_PROMISC, vsi->state)) {
>> +				dev_warn(&vsi->back->pdev->dev,
>> +					 "Error %s adding RX filters on %s, promiscuous mode forced on\n",
>> +					 libie_aq_str(aq_status), vsi_name);
>> +			}
>>    		} else if (vsi->type == I40E_VSI_SRIOV ||
>>    			   vsi->type == I40E_VSI_VMDQ1 ||
>>    			   vsi->type == I40E_VSI_VMDQ2) {
>> @@ -2461,10 +2462,11 @@ i40e_aqc_broadcast_filter(struct i40e_vsi *vsi, const char *vsi_name,
>>    	}
>>    
>>    	if (aq_ret) {
>> -		set_bit(__I40E_VSI_OVERFLOW_PROMISC, vsi->state);
>> -		dev_warn(&vsi->back->pdev->dev,
>> -			 "Error %s, forcing overflow promiscuous on %s\n",
>> -			 libie_aq_str(hw->aq.asq_last_status), vsi_name);
>> +		if (!test_and_set_bit(__I40E_VSI_OVERFLOW_PROMISC, vsi->state)) {
>> +			dev_warn(&vsi->back->pdev->dev,
>> +				 "Error %s, forcing overflow promiscuous on %s\n",
>> +				 libie_aq_str(hw->aq.asq_last_status), vsi_name);
>> +		}
>>    	}
>>    
>>    	return aq_ret;