netdev - RE: [PATCH V8 3/9] cfg80211: expose nl80211_chan_width_to

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Date: Mon, 14 Aug 2023 08:04:54 +0000
From: "Quan, Evan" <Evan.Quan@....com>
To: Jeff Johnson <quic_jjohnson@...cinc.com>, "rafael@...nel.org"
	<rafael@...nel.org>, "lenb@...nel.org" <lenb@...nel.org>, "Deucher,
 Alexander" <Alexander.Deucher@....com>, "Koenig, Christian"
	<Christian.Koenig@....com>, "Pan, Xinhui" <Xinhui.Pan@....com>,
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	<edumazet@...gle.com>, "kuba@...nel.org" <kuba@...nel.org>,
	"pabeni@...hat.com" <pabeni@...hat.com>, "Limonciello, Mario"
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CC: "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
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	"amd-gfx@...ts.freedesktop.org" <amd-gfx@...ts.freedesktop.org>,
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Subject: RE: [PATCH V8 3/9] cfg80211: expose nl80211_chan_width_to_mhz for
 wide sharing

[AMD Official Use Only - General]



> -----Original Message-----
> From: Jeff Johnson <quic_jjohnson@...cinc.com>
> Sent: Thursday, August 10, 2023 10:06 PM
> To: Quan, Evan <Evan.Quan@....com>; rafael@...nel.org; lenb@...nel.org;
> Deucher, Alexander <Alexander.Deucher@....com>; Koenig, Christian
> <Christian.Koenig@....com>; Pan, Xinhui <Xinhui.Pan@....com>;
> airlied@...il.com; daniel@...ll.ch; johannes@...solutions.net;
> davem@...emloft.net; edumazet@...gle.com; kuba@...nel.org;
> pabeni@...hat.com; Limonciello, Mario <Mario.Limonciello@....com>;
> mdaenzer@...hat.com; maarten.lankhorst@...ux.intel.com;
> tzimmermann@...e.de; hdegoede@...hat.com; jingyuwang_vip@....com;
> Lazar, Lijo <Lijo.Lazar@....com>; jim.cromie@...il.com;
> bellosilicio@...il.com; andrealmeid@...lia.com; trix@...hat.com;
> jsg@....id.au; arnd@...db.de; andrew@...n.ch
> Cc: linux-kernel@...r.kernel.org; linux-acpi@...r.kernel.org; amd-
> gfx@...ts.freedesktop.org; dri-devel@...ts.freedesktop.org; linux-
> wireless@...r.kernel.org; netdev@...r.kernel.org
> Subject: Re: [PATCH V8 3/9] cfg80211: expose nl80211_chan_width_to_mhz
> for wide sharing
> 
> On 8/10/2023 12:37 AM, Evan Quan wrote:
> > The newly added WBRF feature needs this interface for channel width
> > calculation.
> >
> > Signed-off-by: Evan Quan <evan.quan@....com>
> > ---
> >   include/net/cfg80211.h | 8 ++++++++
> >   net/wireless/chan.c    | 3 ++-
> >   2 files changed, 10 insertions(+), 1 deletion(-)
> >
> > diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h index
> > 7c7d03aa9d06..f50508e295db 100644
> > --- a/include/net/cfg80211.h
> > +++ b/include/net/cfg80211.h
> > @@ -920,6 +920,14 @@ const struct cfg80211_chan_def *
> >   cfg80211_chandef_compatible(const struct cfg80211_chan_def
> *chandef1,
> >   			    const struct cfg80211_chan_def *chandef2);
> >
> > +/**
> > + * nl80211_chan_width_to_mhz - get the channel width in Mhz
> > + * @chan_width: the channel width from &enum nl80211_chan_width
> > + * Return: channel width in Mhz if the chan_width from &enum
> > +nl80211_chan_width
> > + * is valid. -1 otherwise.
> 
> SI nit: s/Mhz/MHz/ in both places
Thanks, will update them accordingly.

Evan
> 
> > + */
> > +int nl80211_chan_width_to_mhz(enum nl80211_chan_width
> chan_width);
> > +
> >   /**
> >    * cfg80211_chandef_valid - check if a channel definition is valid
> >    * @chandef: the channel definition to check diff --git
> > a/net/wireless/chan.c b/net/wireless/chan.c index
> > 0b7e81db383d..227db04eac42 100644
> > --- a/net/wireless/chan.c
> > +++ b/net/wireless/chan.c
> > @@ -141,7 +141,7 @@ static bool cfg80211_edmg_chandef_valid(const
> struct cfg80211_chan_def *chandef)
> >   	return true;
> >   }
> >
> > -static int nl80211_chan_width_to_mhz(enum nl80211_chan_width
> > chan_width)
> > +int nl80211_chan_width_to_mhz(enum nl80211_chan_width chan_width)
> >   {
> >   	int mhz;
> >
> > @@ -190,6 +190,7 @@ static int nl80211_chan_width_to_mhz(enum
> nl80211_chan_width chan_width)
> >   	}
> >   	return mhz;
> >   }
> > +EXPORT_SYMBOL(nl80211_chan_width_to_mhz);
> >
> >   static int cfg80211_chandef_get_width(const struct cfg80211_chan_def
> *c)
> >   {