Gitweb:     
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f5cdf30618cf855c2043e5c0c131ebb120929864
Commit:     f5cdf30618cf855c2043e5c0c131ebb120929864
Parent:     5b94f675f57e4ff16c8fda09088d7480a84dcd91
Author:     Larry Finger <[EMAIL PROTECTED]>
AuthorDate: Sat Apr 21 17:56:29 2007 -0500
Committer:  John W. Linville <[EMAIL PROTECTED]>
CommitDate: Tue May 8 11:51:59 2007 -0400

    [PATCH] ieee80211: add ieee80211_channel_to_freq
    
    The routines that interrogate the ieee80211_geo struct are missing a
    channel to frequency entry. This patch adds it.
    
    Signed-off-by: Larry Finger <[EMAIL PROTECTED]>
    Signed-off-by: John W. Linville <[EMAIL PROTECTED]>
---
 include/net/ieee80211.h       |    2 ++
 net/ieee80211/ieee80211_geo.c |   16 ++++++++++++++++
 2 files changed, 18 insertions(+), 0 deletions(-)

diff --git a/include/net/ieee80211.h b/include/net/ieee80211.h
index d56b292..bbd85cd 100644
--- a/include/net/ieee80211.h
+++ b/include/net/ieee80211.h
@@ -1291,6 +1291,8 @@ extern u8 ieee80211_get_channel_flags(struct 
ieee80211_device *ieee,
 extern const struct ieee80211_channel *ieee80211_get_channel(struct
                                                             ieee80211_device
                                                             *ieee, u8 channel);
+extern u32 ieee80211_channel_to_freq(struct ieee80211_device * ieee,
+                                     u8 channel);
 
 /* ieee80211_wx.c */
 extern int ieee80211_wx_get_scan(struct ieee80211_device *ieee,
diff --git a/net/ieee80211/ieee80211_geo.c b/net/ieee80211/ieee80211_geo.c
index 305a09d..960ad13 100644
--- a/net/ieee80211/ieee80211_geo.c
+++ b/net/ieee80211/ieee80211_geo.c
@@ -94,6 +94,21 @@ int ieee80211_channel_to_index(struct ieee80211_device 
*ieee, u8 channel)
        return -1;
 }
 
+u32 ieee80211_channel_to_freq(struct ieee80211_device * ieee, u8 channel)
+{
+       const struct ieee80211_channel * ch;
+
+       /* Driver needs to initialize the geography map before using
+        * these helper functions */
+       if (ieee->geo.bg_channels == 0 && ieee->geo.a_channels == 0)
+               return 0;
+
+       ch = ieee80211_get_channel(ieee, channel);
+       if (!ch->channel)
+               return 0;
+       return ch->freq;
+}
+
 u8 ieee80211_freq_to_channel(struct ieee80211_device * ieee, u32 freq)
 {
        int i;
@@ -174,6 +189,7 @@ EXPORT_SYMBOL(ieee80211_get_channel);
 EXPORT_SYMBOL(ieee80211_get_channel_flags);
 EXPORT_SYMBOL(ieee80211_is_valid_channel);
 EXPORT_SYMBOL(ieee80211_freq_to_channel);
+EXPORT_SYMBOL(ieee80211_channel_to_freq);
 EXPORT_SYMBOL(ieee80211_channel_to_index);
 EXPORT_SYMBOL(ieee80211_set_geo);
 EXPORT_SYMBOL(ieee80211_get_geo);
-
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