[PATCH v3] gro : packets not getting flushed in heavy-weight mode API

[Kumara Parameshwaran]

In heavy-weight mode GRO which is based on timer, the GRO packets will not be
flushed inspite of timer expiry if there is no packet in the current poll.
If timer mode GRO is enabled the rte_gro_timeout_flush API should be invoked.

Signed-off-by: Kumara Parameshwaran <kumaraparamesh92 at gmail.com>
---
v1:
    Changes to make sure that the GRO flush API is invoked if there are no packets in 
    current poll and timer expiry.

v2:
    Fix code organisation issue

v3:
    Fix warnings

 app/test-pmd/csumonly.c | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/app/test-pmd/csumonly.c b/app/test-pmd/csumonly.c
index c103e54111..b50f1b01d0 100644
--- a/app/test-pmd/csumonly.c
+++ b/app/test-pmd/csumonly.c
@@ -863,16 +863,24 @@ pkt_burst_checksum_forward(struct fwd_stream *fs)
 
 	/* receive a burst of packet */
 	nb_rx = common_fwd_stream_receive(fs, pkts_burst, nb_pkt_per_burst);
+#ifdef RTE_LIB_GRO
+	gro_enable = gro_ports[fs->rx_port].enable;
+	if (unlikely(nb_rx == 0)) {
+		if (gro_enable && (gro_flush_cycles != GRO_DEFAULT_FLUSH_CYCLES))
+			goto init;
+		else 
+			return false;
+	}
+#else
 	if (unlikely(nb_rx == 0))
 		return false;
+#endif
 
+init:
 	rx_bad_ip_csum = 0;
 	rx_bad_l4_csum = 0;
 	rx_bad_outer_l4_csum = 0;
 	rx_bad_outer_ip_csum = 0;
-#ifdef RTE_LIB_GRO
-	gro_enable = gro_ports[fs->rx_port].enable;
-#endif
 
 	txp = &ports[fs->tx_port];
 	tx_offloads = txp->dev_conf.txmode.offloads;
-- 
2.25.1