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authorChristian Lamparter <chunkeey@web.de>2009-04-18 19:39:15 +0200
committerJohn W. Linville <linville@tuxdriver.com>2009-04-22 16:57:16 -0400
commitfef99929cd6b409a67a35e41f7c177bade5bca34 (patch)
tree9dafe774df9920c9349c721fd33894e3ac0f62ed
parentd577e7cdb1be027bc51ee1030bc7fd647ea6d0da (diff)
mac80211: set CLEAR_PS for pspolled frames
This patch sets IEEE80211_TX_CTL_CLEAR_PS_FILT for outgoing frames for a half-wake station. this is necessary if one wants to get ps-poll working properly with a p54 ap. Signed-off-by: Christian Lamparter <chunkeey@web.de> Signed-off-by: John W. Linville <linville@tuxdriver.com>
-rw-r--r--net/mac80211/tx.c18
1 files changed, 17 insertions, 1 deletions
diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
index 3fb04a86444..f336cc731df 100644
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -409,8 +409,24 @@ ieee80211_tx_h_unicast_ps_buf(struct ieee80211_tx_data *tx)
sta->sta.addr);
}
#endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */
- clear_sta_flags(sta, WLAN_STA_PSPOLL);
+ if (test_and_clear_sta_flags(sta, WLAN_STA_PSPOLL)) {
+ /*
+ * The sleeping station with pending data is now snoozing.
+ * It queried us for its buffered frames and will go back
+ * to deep sleep once it got everything.
+ *
+ * inform the driver, in case the hardware does powersave
+ * frame filtering and keeps a station blacklist on its own
+ * (e.g: p54), so that frames can be delivered unimpeded.
+ *
+ * Note: It should be save to disable the filter now.
+ * As, it is really unlikely that we still have any pending
+ * frame for this station in the hw's buffers/fifos left,
+ * that is not rejected with a unsuccessful tx_status yet.
+ */
+ info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT;
+ }
return TX_CONTINUE;
}