From: Felix Fietkau nbd@nbd.name
commit 1236af327af476731aa548dfcbbefb1a3ec6726a upstream.
We need to skip sampling if the next sample time is after jiffies, not before. This patch fixes an issue where in some cases only very little sampling (or none at all) is performed, leading to really bad data rates
Fixes: 80d55154b2f8 ("mac80211: minstrel_ht: significantly redesign the rate probing strategy") Cc: stable@vger.kernel.org Signed-off-by: Felix Fietkau nbd@nbd.name Link: https://lore.kernel.org/r/20210617103854.61875-1-nbd@nbd.name Signed-off-by: Johannes Berg johannes.berg@intel.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- net/mac80211/rc80211_minstrel_ht.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/net/mac80211/rc80211_minstrel_ht.c +++ b/net/mac80211/rc80211_minstrel_ht.c @@ -1516,7 +1516,7 @@ minstrel_ht_get_rate(void *priv, struct (info->control.flags & IEEE80211_TX_CTRL_PORT_CTRL_PROTO)) return;
- if (time_is_before_jiffies(mi->sample_time)) + if (time_is_after_jiffies(mi->sample_time)) return;
mi->sample_time = jiffies + MINSTREL_SAMPLE_INTERVAL;