linux-kernel - RE: [EXT] Re: [PATCH v9 2/2] wifi: mwifiex: add host mlme for AP mode

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Date: Mon, 18 Mar 2024 02:04:04 +0000
From: David Lin <yu-hao.lin@....com>
To: Brian Norris <briannorris@...omium.org>
CC: "linux-wireless@...r.kernel.org" <linux-wireless@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"kvalo@...nel.org" <kvalo@...nel.org>, "francesco@...cini.it"
	<francesco@...cini.it>, Pete Hsieh <tsung-hsien.hsieh@....com>, Francesco
 Dolcini <francesco.dolcini@...adex.com>
Subject: RE: [EXT] Re: [PATCH v9 2/2] wifi: mwifiex: add host mlme for AP mode

> From: Brian Norris <briannorris@...omium.org>
> Sent: Saturday, March 16, 2024 8:45 AM
> To: David Lin <yu-hao.lin@....com>
> Cc: linux-wireless@...r.kernel.org; linux-kernel@...r.kernel.org;
> kvalo@...nel.org; francesco@...cini.it; Pete Hsieh
> <tsung-hsien.hsieh@....com>; Francesco Dolcini
> <francesco.dolcini@...adex.com>
> Subject: [EXT] Re: [PATCH v9 2/2] wifi: mwifiex: add host mlme for AP mode
> 
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> 
> 
> On Wed, Mar 06, 2024 at 10:00:53AM +0800, David Lin wrote:
> > Add host based MLME to enable WPA3 functionalities in AP mode.
> > This feature required a firmware with the corresponding V2 Key API
> > support. The feature (WPA3) is currently enabled and verified only on
> > IW416. Also, verified no regression with change when host MLME is
> > disabled.
> >
> > Signed-off-by: David Lin <yu-hao.lin@....com>
> > Reviewed-by: Francesco Dolcini <francesco.dolcini@...adex.com>
> 
> Quick pass for now; nothing jumps out at me today, but I'll give a better
> look/Ack next week:
> 
> > --- a/drivers/net/wireless/marvell/mwifiex/cfg80211.c
> > +++ b/drivers/net/wireless/marvell/mwifiex/cfg80211.c
> 
> 
> > @@ -3951,12 +3974,43 @@
> mwifiex_cfg80211_tdls_cancel_chan_switch(struct wiphy *wiphy,
> >       }
> >  }
> >
> > +static int
> > +mwifiex_cfg80211_uap_add_station(struct mwifiex_private *priv, const u8
> *mac,
> > +                              struct station_parameters *params) {
> > +     struct mwifiex_sta_info add_sta;
> > +     int ret;
> > +
> > +     memcpy(add_sta.peer_mac, mac, ETH_ALEN);
> > +     add_sta.params = params;
> > +
> > +     ret = mwifiex_send_cmd(priv, HostCmd_CMD_ADD_NEW_STATION,
> > +                            HostCmd_ACT_ADD_STA, 0, (void
> *)&add_sta,
> > + true);
> > +
> > +     if (!ret) {
> > +             struct station_info *sinfo;
> > +
> > +             sinfo = kzalloc(sizeof(*sinfo), GFP_KERNEL);
> 
> Couldn't this just be stack allocation?
> 
>                 struct staion_info sinfo;
> 
>                 cfg80211_new_sta(priv->netdev, mac, &sinfo,
> GFP_KERNEL);
> 
> I'm not sure you need to kzalloc() something here, if you're freeing it a few
> lines later.
>

Will modify it in patch v10.
 
> 
> > +             if (!sinfo)
> > +                     return -ENOMEM;
> > +
> > +             cfg80211_new_sta(priv->netdev, mac, sinfo, GFP_KERNEL);
> > +             kfree(sinfo);
> > +     }
> > +
> > +     return ret;
> > +}
> 
> Brian