mac80211: warn only once about not finding a rate

The warning really shouldn't happen, but until we
find the reason why it does don't spew it all the
time, just once is enough to know we've hit it.

Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index dc1123a..72eddd1 100644 (file)
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -3567,8 +3567,9 @@ rate_lowest_index(struct ieee80211_supported_band *sband,
                        return i;
 
        /* warn when we cannot find a rate. */
-       WARN_ON(1);
+       WARN_ON_ONCE(1);
 
+       /* and return 0 (the lowest index) */
        return 0;
 }