This is a note to let you know that I've just added the patch titled
mac80211: minstrel: fix tx status processing corner case
to the 4.4-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:
mac80211-minstrel-fix-tx-status-processing-corner-case.patch
and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From b2911a84396f72149dce310a3b64d8948212c1b3 Mon Sep 17 00:00:00 2001
From: Felix Fietkau <nbd@xxxxxxxx>
Date: Wed, 11 Nov 2020 19:33:59 +0100
Subject: mac80211: minstrel: fix tx status processing corner case
From: Felix Fietkau <nbd@xxxxxxxx>
commit b2911a84396f72149dce310a3b64d8948212c1b3 upstream.
Some drivers fill the status rate list without setting the rate index after
the final rate to -1. minstrel_ht already deals with this, but minstrel
doesn't, which causes it to get stuck at the lowest rate on these drivers.
Fix this by checking the count as well.
Cc: stable@xxxxxxxxxxxxxxx
Fixes: cccf129f820e ("mac80211: add the 'minstrel' rate control algorithm")
Signed-off-by: Felix Fietkau <nbd@xxxxxxxx>
Link: https://lore.kernel.org/r/20201111183359.43528-3-nbd@xxxxxxxx
Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
net/mac80211/rc80211_minstrel.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/net/mac80211/rc80211_minstrel.c
+++ b/net/mac80211/rc80211_minstrel.c
@@ -274,7 +274,7 @@ minstrel_tx_status(void *priv, struct ie
success = !!(info->flags & IEEE80211_TX_STAT_ACK);
for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
- if (ar[i].idx < 0)
+ if (ar[i].idx < 0 || !ar[i].count)
break;
ndx = rix_to_ndx(mi, ar[i].idx);
Patches currently in stable-queue which might be from nbd@xxxxxxxx are
queue-4.4/mac80211-minstrel-fix-tx-status-processing-corner-case.patch
queue-4.4/mac80211-minstrel-remove-deferred-sampling-code.patch
