linux-kernel - [V11 2/8] cfg80211: expose nl80211_chan_width_to

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Message-ID: <20230831062031.1014799-3-evan.quan@amd.com>
Date:   Thu, 31 Aug 2023 14:20:25 +0800
From:   Evan Quan <evan.quan@....com>
To:     <lenb@...nel.org>, <johannes@...solutions.net>,
        <davem@...emloft.net>, <edumazet@...gle.com>, <kuba@...nel.org>,
        <pabeni@...hat.com>, <alexander.deucher@....com>,
        <rafael@...nel.org>, <Lijo.Lazar@....com>,
        <mario.limonciello@....com>
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>,
        Evan Quan <evan.quan@....com>
Subject: [V11 2/8] cfg80211: expose nl80211_chan_width_to_mhz for wide sharing

The newly added WBRF feature needs this interface for channel
width calculation.

Signed-off-by: Evan Quan <evan.quan@....com>
--
v8->v9:
  - correct typo(Mhz -> MHz) (Johnson)
---
 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..8c2a9b748621 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.
+ */
+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)
 {
-- 
2.34.1