diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
index ce4596e..bd1224f 100644
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -237,6 +237,10 @@
 				     &local->dynamic_ps_disable_work);
 	}
 
+	/* Don't restart the timer if we're not disassociated */
+	if (!ifmgd->associated)
+		return TX_CONTINUE;
+
 	mod_timer(&local->dynamic_ps_timer, jiffies +
 		  msecs_to_jiffies(local->hw.conf.dynamic_ps_timeout));