[056/289] mac80211: clear txflags for ps-filtered frames

Greg KH
2010-12-08T01:51:49Z

From: Christian Lamparter <chunkeey@googlemail.com>

commit eb7d3066cf864342e8ae6a5c1126a1602c4d06c0 upstream.

This patch fixes stale mac80211_tx_control_flags for
filtered / retried frames.

Because ieee80211_handle_filtered_frame feeds skbs back
into the tx path, they have to be stripped of some tx
flags so they won't confuse the stack, driver or device.

Acked-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Christian Lamparter <chunkeey@googlemail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

---
include/net/mac80211.h | 16 ++++++++++++++++
net/mac80211/status.c | 1 +
2 files changed, 17 insertions(+)

--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -315,6 +315,9 @@ struct ieee80211_bss_conf {
* @IEEE80211_TX_CTL_LDPC: tells the driver to use LDPC for this frame
* @IEEE80211_TX_CTL_STBC: Enables Space-Time Block Coding (STBC) for this
* frame and selects the maximum number of streams that it can use.
+ *
+ * Note: If you have to add new flags to the enumeration, then don't
+ * forget to update %IEEE80211_TX_TEMPORARY_FLAGS when necessary.
*/
enum mac80211_tx_control_flags {
IEEE80211_TX_CTL_REQ_TX_STATUS = BIT(0),
@@ -344,6 +347,19 @@ enum mac80211_tx_control_flags {

#define IEEE80211_TX_CTL_STBC_SHIFT 23

+/*
+ * This definition is used as a mask to clear all temporary flags, which are
+ * set by the tx handlers for each transmission attempt by the mac80211 stack.
+ */
+#define IEEE80211_TX_TEMPORARY_FLAGS (IEEE80211_TX_CTL_NO_ACK | \
+ IEEE80211_TX_CTL_CLEAR_PS_FILT | IEEE80211_TX_CTL_FIRST_FRAGMENT | \
+ IEEE80211_TX_CTL_SEND_AFTER_DTIM | IEEE80211_TX_CTL_AMPDU | \
+ IEEE80211_TX_STAT_TX_FILTERED | IEEE80211_TX_STAT_ACK | \
+ IEEE80211_TX_STAT_AMPDU | IEEE80211_TX_STAT_AMPDU_NO_BACK | \
+ IEEE80211_TX_CTL_RATE_CTRL_PROBE | IEEE80211_TX_CTL_PSPOLL_RESPONSE | \
+ IEEE80211_TX_CTL_MORE_FRAMES | IEEE80211_TX_CTL_LDPC | \
+ IEEE80211_TX_CTL_STBC)
+
/**
* enum mac80211_rate_control_flags - per-rate flags set by the
* Rate Control algorithm.
--- a/net/mac80211/status.c
+++ b/net/mac80211/status.c
@@ -58,6 +58,7 @@ static void ieee80211_handle_filtered_fr
info->control.vif = &sta->sdata->vif;
info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING |
IEEE80211_TX_INTFL_RETRANSMISSION;
+ info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS;

sta->tx_filtered_count++;