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

Signed-off-by: Evan Quan <redacted>
---
  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.

+ */
+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)
  {