mac80211: explain padding in place of rate field

Apparently this was confusing still ... add a
note that the byte is needed as padding.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c
index 54858a68abd730abf731583c3bca7633f9418c34..1f06b31e21c15f1ebb5bf5836cc5107899b19639 100644 (file)
--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@ -143,7 +143,8 @@ ieee80211_add_rx_radiotap_header(struct ieee80211_local *local,
        if (status->flag & RX_FLAG_HT) {
                /*
                 * MCS information is a separate field in radiotap,
-                * added below.
+                * added below. The byte here is needed as padding
+                * for the channel though, so initialise it to 0.
                 */
                *pos = 0;
        } else {