[dpdk-dev] [PATCH 2/3] app/testpmd: remove forwarding config from parsing Rx and Tx

[Lijun Ou <oulijun@huawei.com>]

From: Huisong Li <lihuisong@huawei.com>

The "fwd_config_setup()" function does release and apply for
memory of forwarding flows, and re-establish these flows when
rxq/txq or rxd/txd is changed. The function is also called by
"start_packet_forwarding()" when user executes "start" cmd.
All changes for rxq/txq or rxd/txd can be updated uniformly
when this command is executed. Therefore, it is a little
redundant in the "cmd_config_rx_tx_parsed" function.

In addition, the forwarding flows under one TC is configured
based on number of queues allocated to TC. And number of queues
allocated to TC is updated after calling  "rte_eth_dev_configure"
again. If the number of queues is reduced after configuring the
DCB, and then, release and apply for flow memory, and reinitialize
the forwarding flows under the DCB mode based on the old TC
information. As a result, null pointer may be accessed.

Like:
set nbcore 4
port stop all
port config 0 dcb vt off 4 pfc on
port start all
port stop all
port config all rxq 8
port config all txq 8

At the moment, a segmentation fault occurs.

Fixes: ce8d561418d4 ("app/testpmd: add port configuration settings")
Cc: stable@dpdk.org

Signed-off-by: Huisong Li <lihuisong@huawei.com>
Signed-off-by: Lijun Ou <oulijun@huawei.com>
---
 app/test-pmd/cmdline.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/app/test-pmd/cmdline.c b/app/test-pmd/cmdline.c
index 832ae70..8b0f7d5 100644
--- a/app/test-pmd/cmdline.c
+++ b/app/test-pmd/cmdline.c
@@ -1837,8 +1837,6 @@ cmd_config_rx_tx_parsed(void *parsed_result,
 		return;
 	}
 
-	fwd_config_setup();
-
 	init_port_config();
 
 	cmd_reconfig_device_queue(RTE_PORT_ALL, 1, 1);
-- 
2.7.4