strparser: Queue work when being unpaused

When the upper layer unpauses a stream parser connection we need to
queue rx_work to make sure no events are missed.

Signed-off-by: Tom Herbert <tom@herbertland.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/net/strparser.h

@@ -88,10 +88,7 @@ static inline void strp_pause(struct strparser *strp)
 }
 
 /* May be called without holding lock for attached socket */
-static inline void strp_unpause(struct strparser *strp)
-{
-	strp->rx_paused = 0;
-}
+void strp_unpause(struct strparser *strp);
 
 static inline void save_strp_stats(struct strparser *strp,
 				   struct strp_aggr_stats *agg_stats)

net/strparser/strparser.c

@@ -445,6 +445,17 @@ int strp_init(struct strparser *strp, struct sock *csk,
 }
 EXPORT_SYMBOL_GPL(strp_init);
 
+void strp_unpause(struct strparser *strp)
+{
+	strp->rx_paused = 0;
+
+	/* Sync setting rx_paused with RX work */
+	smp_mb();
+
+	queue_work(strp_wq, &strp->rx_work);
+}
+EXPORT_SYMBOL_GPL(strp_unpause);
+
 /* strp must already be stopped so that strp_tcp_recv will no longer be called.
  * Note that strp_done is not called with the lower socket held.
  */