1 files changed, 28 insertions, 0 deletions

diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index 316f34bb8e6e..e3a39fc9a296 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -188,6 +188,8 @@ struct ieee80211_channel {
  *      when used with 802.11g (on the 2.4 GHz band); filled by the
  *      core code when registering the wiphy.
  * @IEEE80211_RATE_ERP_G: This is an ERP rate in 802.11g mode.
+ * @IEEE80211_RATE_SUPPORTS_5MHZ: Rate can be used in 5 MHz mode
+ * @IEEE80211_RATE_SUPPORTS_10MHZ: Rate can be used in 10 MHz mode
  */
 enum ieee80211_rate_flags {
         IEEE80211_RATE_SHORT_PREAMBLE   = 1<<0,
@@ -195,6 +197,8 @@ enum ieee80211_rate_flags {
         IEEE80211_RATE_MANDATORY_B      = 1<<2,
         IEEE80211_RATE_MANDATORY_G      = 1<<3,
         IEEE80211_RATE_ERP_G            = 1<<4,
+        IEEE80211_RATE_SUPPORTS_5MHZ    = 1<<5,
+        IEEE80211_RATE_SUPPORTS_10MHZ   = 1<<6,
 };
 
 /**
@@ -433,6 +437,30 @@ bool cfg80211_chandef_usable(struct wiphy *wiphy,
                              u32 prohibited_flags);
 
 /**
+ * ieee80211_chandef_rate_flags - returns rate flags for a channel
+ *
+ * In some channel types, not all rates may be used - for example CCK
+ * rates may not be used in 5/10 MHz channels.
+ *
+ * @chandef: channel definition for the channel
+ *
+ * Returns: rate flags which apply for this channel
+ */
+static inline enum ieee80211_rate_flags
+ieee80211_chandef_rate_flags(struct cfg80211_chan_def *chandef)
+{
+        switch (chandef->width) {
+        case NL80211_CHAN_WIDTH_5:
+                return IEEE80211_RATE_SUPPORTS_5MHZ;
+        case NL80211_CHAN_WIDTH_10:
+                return IEEE80211_RATE_SUPPORTS_10MHZ;
+        default:
+                break;
+        }
+        return 0;
+}
+
+/**
  * enum survey_info_flags - survey information flags
  *
  * @SURVEY_INFO_NOISE_DBM: noise (in dBm) was filled in