netdev - Re: [Intel-wired-lan] [PATCH iwl-next] ice: use ice_down

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Message-ID: <44e523ad-e68c-725f-efb5-b1a1323adfb2@intel.com>
Date: Tue, 13 Jun 2023 12:25:08 +0200
From: Przemek Kitszel <przemyslaw.kitszel@...el.com>
To: Maciej Fijalkowski <maciej.fijalkowski@...el.com>,
	<intel-wired-lan@...ts.osuosl.org>
CC: <netdev@...r.kernel.org>, <anthony.l.nguyen@...el.com>,
	<magnus.karlsson@...el.com>
Subject: Re: [Intel-wired-lan] [PATCH iwl-next] ice: use ice_down_up() where
 applicable

On 6/12/23 16:17, Maciej Fijalkowski wrote:
> ice_change_mtu() is currently using a separate ice_down() and ice_up()
> calls to reflect changed MTU. ice_down_up() serves this purpose, so do
> the refactoring here.
> 
> Signed-off-by: Maciej Fijalkowski <maciej.fijalkowski@...el.com>
> ---
>   drivers/net/ethernet/intel/ice/ice_main.c | 12 ++----------
>   1 file changed, 2 insertions(+), 10 deletions(-)
> 
> diff --git a/drivers/net/ethernet/intel/ice/ice_main.c b/drivers/net/ethernet/intel/ice/ice_main.c
> index a1f7c8edc22f..609df077c314 100644
> --- a/drivers/net/ethernet/intel/ice/ice_main.c
> +++ b/drivers/net/ethernet/intel/ice/ice_main.c
> @@ -7634,17 +7634,9 @@ static int ice_change_mtu(struct net_device *netdev, int new_mtu)
>   
>   	/* if VSI is up, bring it down and then back up */
>   	if (!test_and_set_bit(ICE_VSI_DOWN, vsi->state)) {

I would remove the above if(), as ice_down_up() starts with:
	if (test_and_set_bit(ICE_VSI_DOWN, vsi->state))
		return 0;

which, with your change applied would just return 0.


> -		err = ice_down(vsi);
> -		if (err) {
> -			netdev_err(netdev, "change MTU if_down err %d\n", err);
> -			return err;
> -		}
> -
> -		err = ice_up(vsi);
> -		if (err) {
> -			netdev_err(netdev, "change MTU if_up err %d\n", err);
> +		err = ice_down_up(vsi);
> +		if (err)
>   			return err;
> -		}
>   	}
>   
>   	netdev_dbg(netdev, "changed MTU to %d\n", new_mtu);