strparser: Don't schedule in workqueue in paused state

In function strp_data_ready(), it is useless to call queue_work if
the state of strparser is already paused. The state checking should
be done before calling queue_work. The change reduces the context
switches and improves the ktls-rx throughput by approx 20% (measured
on cortex-a53 based platform).

Signed-off-by: Vakul Garg <vakul.garg@nxp.com>
Acked-by: Dave Watson <davejwatson@fb.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/strparser/strparser.c b/net/strparser/strparser.c
index 1a96951..3738366 100644 (file)
--- a/net/strparser/strparser.c
+++ b/net/strparser/strparser.c
@@ -392,7 +392,7 @@ static int strp_read_sock(struct strparser *strp)
 /* Lower sock lock held */
 void strp_data_ready(struct strparser *strp)
 {
-       if (unlikely(strp->stopped))
+       if (unlikely(strp->stopped) || strp->paused)
                return;
 
        /* This check is needed to synchronize with do_strp_work.
@@ -407,9 +407,6 @@ void strp_data_ready(struct strparser *strp)
                return;
        }
 
-       if (strp->paused)
-               return;
-
        if (strp->need_bytes) {
                if (strp_peek_len(strp) < strp->need_bytes)
                        return;