Three small fixes:

* we hit a failure path bug related to
    ieee80211_txq_setup_flows()
  * also use kvmalloc() to make that less likely
  * fix a timing value shortly after boot (during
    INITIAL_JIFFIES)
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Merge tag 'mac80211-for-net-2019-11-08' of git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211

Johannes Berg says:

====================
Three small fixes:
 * we hit a failure path bug related to
   ieee80211_txq_setup_flows()
 * also use kvmalloc() to make that less likely
 * fix a timing value shortly after boot (during
   INITIAL_JIFFIES)
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

include/net/fq_impl.h

@@ -313,7 +313,7 @@ static int fq_init(struct fq *fq, int flows_cnt)
 	fq->limit = 8192;
 	fq->memory_limit = 16 << 20; /* 16 MBytes */
 
-	fq->flows = kcalloc(fq->flows_cnt, sizeof(fq->flows[0]), GFP_KERNEL);
+	fq->flows = kvcalloc(fq->flows_cnt, sizeof(fq->flows[0]), GFP_KERNEL);
 	if (!fq->flows)
 		return -ENOMEM;
 
@@ -331,7 +331,7 @@ static void fq_reset(struct fq *fq,
 	for (i = 0; i < fq->flows_cnt; i++)
 		fq_flow_reset(fq, &fq->flows[i], free_func);
 
-	kfree(fq->flows);
+	kvfree(fq->flows);
 	fq->flows = NULL;
 }
 

net/mac80211/main.c

@@ -1292,8 +1292,8 @@ int ieee80211_register_hw(struct ieee80211_hw *hw)
 	ieee80211_remove_interfaces(local);
  fail_rate:
 	rtnl_unlock();
-	ieee80211_led_exit(local);
  fail_flows:
+	ieee80211_led_exit(local);
 	destroy_workqueue(local->workqueue);
  fail_workqueue:
 	wiphy_unregister(local->hw.wiphy);

net/mac80211/sta_info.c

@@ -2457,7 +2457,8 @@ unsigned long ieee80211_sta_last_active(struct sta_info *sta)
 {
 	struct ieee80211_sta_rx_stats *stats = sta_get_last_rx_stats(sta);
 
-	if (time_after(stats->last_rx, sta->status_stats.last_ack))
+	if (!sta->status_stats.last_ack ||
+	    time_after(stats->last_rx, sta->status_stats.last_ack))
 		return stats->last_rx;
 	return sta->status_stats.last_ack;
 }