linux-kernel - Re: [PATCH 1/2] wifi: mwifiex: simplify WPA flags setting

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Message-ID: <ZpdkDqJK63_a0ncW@pengutronix.de>
Date: Wed, 17 Jul 2024 08:26:22 +0200
From: Sascha Hauer <s.hauer@...gutronix.de>
To: Francesco Dolcini <francesco@...cini.it>
Cc: Brian Norris <briannorris@...omium.org>, Kalle Valo <kvalo@...nel.org>,
	linux-wireless@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] wifi: mwifiex: simplify WPA flags setting

On Tue, Jul 16, 2024 at 09:48:26PM +0200, Francesco Dolcini wrote:
> Hello Sasha,
> thanks for your patch.
> 
> On Tue, Jul 16, 2024 at 01:33:27PM +0200, Sascha Hauer wrote:
> > The WPA flags setting only depends on the wpa_versions bitfield and not
> > on the AKM suite, so move it out of the switch/case to simplify the code
> > a bit. No functional change intended.
> > 
> > Signed-off-by: Sascha Hauer <s.hauer@...gutronix.de>
> 
> Reviewed-by: Francesco Dolcini <francesco.dolcini@...adex.com>
> 
> > ---
> >  drivers/net/wireless/marvell/mwifiex/uap_cmd.c | 27 +++++++-------------------
> >  1 file changed, 7 insertions(+), 20 deletions(-)
> > 
> > diff --git a/drivers/net/wireless/marvell/mwifiex/uap_cmd.c b/drivers/net/wireless/marvell/mwifiex/uap_cmd.c
> > index 491e366119096..8d0cd84d27698 100644
> > --- a/drivers/net/wireless/marvell/mwifiex/uap_cmd.c
> > +++ b/drivers/net/wireless/marvell/mwifiex/uap_cmd.c
> > @@ -46,31 +46,18 @@ int mwifiex_set_secure_params(struct mwifiex_private *priv,
> >  
> >  	bss_config->key_mgmt_operation |= KEY_MGMT_ON_HOST;
> >  
> > +	if (params->crypto.wpa_versions & NL80211_WPA_VERSION_1)
> > +		bss_config->protocol = PROTOCOL_WPA;
> > +	if (params->crypto.wpa_versions & NL80211_WPA_VERSION_2)
> > +		bss_config->protocol |= PROTOCOL_WPA2;
> > +
> 
> I am wondering what happens if NL80211_WPA_VERSION_1 is not set, no idea
> what's the content of bss_config->protocol ...
> 
> in any case this is not something that you introduced, but maybe worth
> having a look?

bss_config is kzalloced in the only caller of mwifiex_set_secure_params(),
so bss_config->protocol is zero on entry.

It might be worth setting it to zero explicitly here to make the code
better understandable without having to look at the callers.

Sascha

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