This is a note to let you know that I've just added the patch titled
ath9k: fix ready time of the multicast buffer queue
to the 3.14-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
ath9k-fix-ready-time-of-the-multicast-buffer-queue.patch
and it can be found in the queue-3.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 3b3e0efb5c72c4fc940af50b33626b8a78a907dc Mon Sep 17 00:00:00 2001
From: Felix Fietkau <nbd@xxxxxxxxxxx>
Date: Sun, 9 Mar 2014 11:02:54 +0100
Subject: ath9k: fix ready time of the multicast buffer queue
From: Felix Fietkau <nbd@xxxxxxxxxxx>
commit 3b3e0efb5c72c4fc940af50b33626b8a78a907dc upstream.
qi->tqi_readyTime is written directly to registers that expect
microseconds as unit instead of TU.
When setting the CABQ ready time, cur_conf->beacon_interval is in TU, so
convert it to microseconds before passing it to ath9k_hw.
This should hopefully fix some Tx DMA issues with buffered multicast
frames in AP mode.
Signed-off-by: Felix Fietkau <nbd@xxxxxxxxxxx>
Signed-off-by: John W. Linville <linville@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/wireless/ath/ath9k/xmit.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/net/wireless/ath/ath9k/xmit.c
+++ b/drivers/net/wireless/ath/ath9k/xmit.c
@@ -1698,7 +1698,7 @@ int ath_cabq_update(struct ath_softc *sc
ath9k_hw_get_txq_props(sc->sc_ah, qnum, &qi);
- qi.tqi_readyTime = (cur_conf->beacon_interval *
+ qi.tqi_readyTime = (TU_TO_USEC(cur_conf->beacon_interval) *
ATH_CABQ_READY_TIME) / 100;
ath_txq_update(sc, qnum, &qi);
Patches currently in stable-queue which might be from nbd@xxxxxxxxxxx are
queue-3.14/mac80211-exclude-ap_vlan-interfaces-from-tx-power-calculation.patch
queue-3.14/ath9k-fix-ready-time-of-the-multicast-buffer-queue.patch
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