[dpdk-dev] [PATCH] common/mlx5: fix uninitialized variable warning

[Stephen Hemminger]

Gcc 8.3.0 (Debian 10) complains about uninitialized variable.

[474/2122] Compiling C object 'drivers/a715181@@tmp_rte_common_mlx5 at sta/common_mlx5_mlx5_nl.c.o'.
In file included from ../drivers/common/mlx5/mlx5_nl.h:12,
                 from ../drivers/common/mlx5/mlx5_nl.c:23:
../drivers/common/mlx5/mlx5_nl.c: In function ‘mlx5_nl_enable_roce_get’:
../drivers/common/mlx5/mlx5_common.h:68:2: warning: ‘cur_en’ may be used uninitialized in this function [-Wmaybe-uninitialized]
  rte_log(RTE_LOG_ ## level, \
  ^~~~~~~
../drivers/common/mlx5/mlx5_nl.c:1560:6: note: ‘cur_en’ was declared here
  int cur_en;
      ^~~~~~

The compiler is correct, this variable would only be set if kernel
netlink response message contains the DEVLINK parameter that flags if
ROCE is enabled.

Fixes: fa69eaef5f49 ("common/mlx5: support ROCE disable through Netlink")
Cc: matan at mellanox.com
---
 drivers/common/mlx5/mlx5_nl.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/common/mlx5/mlx5_nl.c b/drivers/common/mlx5/mlx5_nl.c
index 847e78dbcea6..c6014c3ee0b3 100644
--- a/drivers/common/mlx5/mlx5_nl.c
+++ b/drivers/common/mlx5/mlx5_nl.c
@@ -1557,7 +1557,7 @@ mlx5_nl_enable_roce_get(int nlsk_fd, int family_id, const char *pci_addr,
 	struct genlmsghdr *genl;
 	uint32_t sn = MLX5_NL_SN_GENERATE;
 	int ret;
-	int cur_en;
+	int cur_en = 0;
 	uint8_t buf[NLMSG_ALIGN(sizeof(struct nlmsghdr)) +
 		    NLMSG_ALIGN(sizeof(struct genlmsghdr)) +
 		    NLMSG_ALIGN(sizeof(struct nlattr)) * 4 +
-- 
2.20.1