linux-kernel - Re: [PATCH net] i40e: Fix I40E_FLAG_VF_VLAN

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Date:   Thu, 19 Oct 2023 12:20:55 -0700
From:   Jacob Keller <jacob.e.keller@...el.com>
To:     Przemek Kitszel <przemyslaw.kitszel@...el.com>,
        Ivan Vecera <ivecera@...hat.com>, <netdev@...r.kernel.org>
CC:     Mateusz Palczewski <mateusz.palczewski@...el.com>,
        Jesse Brandeburg <jesse.brandeburg@...el.com>,
        Tony Nguyen <anthony.l.nguyen@...el.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        "moderated list:INTEL ETHERNET DRIVERS" 
        <intel-wired-lan@...ts.osuosl.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH net] i40e: Fix I40E_FLAG_VF_VLAN_PRUNING value



On 10/18/2023 5:30 AM, Przemek Kitszel wrote:
> On 10/18/23 13:26, Ivan Vecera wrote:
>> Commit c87c938f62d8f1 ("i40e: Add VF VLAN pruning") added new
>> PF flag I40E_FLAG_VF_VLAN_PRUNING but its value collides with
>> existing I40E_FLAG_TOTAL_PORT_SHUTDOWN_ENABLED flag.
>>
>> Move the affected flag at the end of the flags and fix its value.
>>
>> Cc: Mateusz Palczewski <mateusz.palczewski@...el.com>
>> Signed-off-by: Ivan Vecera <ivecera@...hat.com>
>> ---
>>   drivers/net/ethernet/intel/i40e/i40e.h | 2 +-
>>   1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/drivers/net/ethernet/intel/i40e/i40e.h b/drivers/net/ethernet/intel/i40e/i40e.h
>> index 6e310a53946782..55bb0b5310d5b4 100644
>> --- a/drivers/net/ethernet/intel/i40e/i40e.h
>> +++ b/drivers/net/ethernet/intel/i40e/i40e.h
>> @@ -580,7 +580,6 @@ struct i40e_pf {
>>   #define I40E_FLAG_DISABLE_FW_LLDP		BIT(24)
>>   #define I40E_FLAG_RS_FEC			BIT(25)
>>   #define I40E_FLAG_BASE_R_FEC			BIT(26)
>> -#define I40E_FLAG_VF_VLAN_PRUNING		BIT(27)
>>   /* TOTAL_PORT_SHUTDOWN
>>    * Allows to physically disable the link on the NIC's port.
>>    * If enabled, (after link down request from the OS)
>> @@ -603,6 +602,7 @@ struct i40e_pf {
> 
> such mistake happened only because list of flags is dispersed so much :/

Better yet if we didn't hard-code the bits, and instead defined them via
an enumeration so that its not possible :D These aren't even ABI so
there's not a backwards compatibility risk either.

Thanks,
Jake