netdev - Re: [PATCH iwl-next] ice: Do not get coalesce settings while in reset

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Message-ID: <8eca364e-8796-d01f-ead3-2a419a9f7658@intel.com>
Date: Tue, 5 Dec 2023 17:09:48 +0100
From: Przemek Kitszel <przemyslaw.kitszel@...el.com>
To: Pawel Chmielewski <pawel.chmielewski@...el.com>,
	<intel-wired-lan@...ts.osuosl.org>
CC: <netdev@...r.kernel.org>, Ngai-Mint Kwan <ngai-mint.kwan@...el.com>,
	Mateusz Polchlopek <mateusz.polchlopek@...el.com>
Subject: Re: [PATCH iwl-next] ice: Do not get coalesce settings while in reset

On 12/5/23 16:26, Pawel Chmielewski wrote:
> From: Ngai-Mint Kwan <ngai-mint.kwan@...el.com>
> 
> Getting coalesce settings while reset is in progress can cause NULL
> pointer deference bug.
> If under reset, abort get coalesce for ethtool.
> 
> Signed-off-by: Ngai-Mint Kwan <ngai-mint.kwan@...el.com>
> Reviewed-by: Mateusz Polchlopek <mateusz.polchlopek@...el.com>
> Signed-off-by: Pawel Chmielewski <pawel.chmielewski@...el.com>
> ---
>   drivers/net/ethernet/intel/ice/ice_ethtool.c | 3 +++
>   1 file changed, 3 insertions(+)
> 
> diff --git a/drivers/net/ethernet/intel/ice/ice_ethtool.c b/drivers/net/ethernet/intel/ice/ice_ethtool.c
> index bde9bc74f928..2d565cc484a0 100644
> --- a/drivers/net/ethernet/intel/ice/ice_ethtool.c
> +++ b/drivers/net/ethernet/intel/ice/ice_ethtool.c
> @@ -3747,6 +3747,9 @@ __ice_get_coalesce(struct net_device *netdev, struct ethtool_coalesce *ec,
>   	struct ice_netdev_priv *np = netdev_priv(netdev);
>   	struct ice_vsi *vsi = np->vsi;
>   
> +	if (ice_is_reset_in_progress(vsi->back->state))
> +		return -EBUSY;
> +
>   	if (q_num < 0)
>   		q_num = 0;
>   

Sorry for a late review,
This asks for a Fixes: tag, and targeting at iwl-net instead :)