mac80211: provide sequence numbers
I've come to think that not providing sequence numbers for
the normal STA mode case was a mistake, at least two drivers
now had to implement code they wouldn't otherwise need, and
I believe at76_usb and adm8211 might be broken.
This patch makes mac80211 assign a sequence number to all
those frames that need one except beacons. That means that
if a driver only implements modes that do not do beaconing
it need not worry about the sequence number.
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
index 22494bc..8bcabef 100644
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -600,8 +600,18 @@
if (ieee80211_hdrlen(hdr->frame_control) < 24)
return TX_CONTINUE;
+ /*
+ * Anything but QoS data that has a sequence number field
+ * (is long enough) gets a sequence number from the global
+ * counter.
+ */
if (!ieee80211_is_data_qos(hdr->frame_control)) {
+ /* driver should assign sequence number */
info->flags |= IEEE80211_TX_CTL_ASSIGN_SEQ;
+ /* for pure STA mode without beacons, we can do it */
+ hdr->seq_ctrl = cpu_to_le16(tx->sdata->sequence_number);
+ tx->sdata->sequence_number += 0x10;
+ tx->sdata->sequence_number &= IEEE80211_SCTL_SEQ;
return TX_CONTINUE;
}