[PATCH 03/23] net/nfp: fix dereference of null pointer

[Chaoyong He]

From: Peng Zhang <peng.zh...@corigine.com>

The original logic can not make sure the 'repr' pointer has
valid value and the dereference of null pointer will cause
a segment fault problem.

Fixes: eae7dadbe987 ("net/nfp: update link status reporting")
Cc: james.hers...@corigine.com
Cc: sta...@dpdk.org

Signed-off-by: Peng Zhang <peng.zh...@corigine.com>
Reviewed-by: Chaoyong He <chaoyong...@corigine.com>
Reviewed-by: Long Wu <long...@corigine.com>
---
 drivers/net/nfp/flower/nfp_flower_ctrl.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/net/nfp/flower/nfp_flower_ctrl.c 
b/drivers/net/nfp/flower/nfp_flower_ctrl.c
index de6e419cac..8cfafe91c8 100644
--- a/drivers/net/nfp/flower/nfp_flower_ctrl.c
+++ b/drivers/net/nfp/flower/nfp_flower_ctrl.c
@@ -441,6 +441,11 @@ nfp_flower_cmsg_port_mod_rx(struct nfp_app_fw_flower 
*app_fw_flower,
                return -EINVAL;
        }
 
+       if (repr == NULL) {
+               PMD_DRV_LOG(ERR, "Can not get 'repr' for port %#x", port);
+               return -EINVAL;
+       }
+
        repr->link.link_duplex = RTE_ETH_LINK_FULL_DUPLEX;
        if ((msg->info & NFP_FLOWER_CMSG_PORT_MOD_INFO_LINK) != 0)
                repr->link.link_status = RTE_ETH_LINK_UP;
-- 
2.39.1