[PATCH] mac80211: fix the multiple warnings for budding chipsets without ampdu_action defined

[Chaitanya <chaitanyatk@posedge.com>]

Warn once should suffice.

Eg: our driver doesn't support the ampdu_action yet, so
seeing a lot of warnings, hence the check for any
new drivers to avoid messing the kernel log.

Changed the mail client to thunder bird to avoid whitespace issues.
Changed the subject and also the signing off to use offical mail.
Changed the setting for tabs (width=8, noexpandtab) and whitespaces.

Signed-off-by: T Krishna Chaitanya <chaitanyatk@posedge.com>
---
net/mac80211/agg-tx.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/net/mac80211/agg-tx.c b/net/mac80211/agg-tx.c
index 4152ed1..eb9df22 100644
--- a/net/mac80211/agg-tx.c
+++ b/net/mac80211/agg-tx.c
@@ -445,7 +445,7 @@ int ieee80211_start_tx_ba_session(struct ieee80211_sta *pubsta, u16 tid,
 
     trace_api_start_tx_ba_session(pubsta, tid);
 
-    if (WARN_ON(!local->ops->ampdu_action))
+    if (WARN_ON_ONCE(!local->ops->ampdu_action))
         return -EINVAL;
 
     if ((tid >= IEEE80211_NUM_TIDS) ||