mac80211: allow easier multicast/broadcast buffering in hardware

There are various decisions influencing the decision whether to buffer
a frame for after the next DTIM beacon. The "do we have stations in PS
mode" condition cannot be tested by the driver so mac80211 has to do
that. To ease driver writing for hardware that can buffer frames until
after the next DTIM beacon, introduce a new txctl flag telling the
driver to buffer a specific frame.

While at it, restructure and comment the code for multicast buffering
and remove spurious "inline" directives.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Cc: Michael Buesch <mb@bu3sch.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 0 deletions

diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index 2606ca282c5e..5b9e7a262448 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -308,6 +308,8 @@ struct ieee80211_tx_control {
                                                   * set_retry_limit configured
                                                   * long retry value */
 #define IEEE80211_TXCTL_EAPOL_FRAME     (1<<11) /* internal to mac80211 */
+#define IEEE80211_TXCTL_SEND_AFTER_DTIM (1<<12) /* send this frame after DTIM
+                                                 * beacon */
         u32 flags;                             /* tx control flags defined
                                                 * above */
         u8 key_idx;             /* keyidx from hw->set_key(), undefined if