[dpdk-dev] [PATCH] net/af_xdp: fix xdp_get_channels_info return value

["Július Milan" <jmilan.dev@gmail.com>]

Procedure xdp_get_channels_info was returning error code -1 in case of
ioctl command SIOCETHTOOL was not supported. This patch sets return
value back to 0 as it is valid case.

Fixes: 339b88c6a9 ("net/af_xdp: support multi-queue")

Signed-off-by: Július Milan <jmilan.dev@gmail.com>
---
 drivers/net/af_xdp/rte_eth_af_xdp.c | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/drivers/net/af_xdp/rte_eth_af_xdp.c b/drivers/net/af_xdp/rte_eth_af_xdp.c
index ff8e90589..33352e10a 100644
--- a/drivers/net/af_xdp/rte_eth_af_xdp.c
+++ b/drivers/net/af_xdp/rte_eth_af_xdp.c
@@ -852,9 +852,13 @@ xdp_get_channels_info(const char *if_name, int *max_queues,
 	ifr.ifr_data = (void *)&channels;
 	strncpy(ifr.ifr_name, if_name, IFNAMSIZ);
 	ret = ioctl(fd, SIOCETHTOOL, &ifr);
-	if (ret && errno != EOPNOTSUPP) {
-		ret = -errno;
-		goto out;
+	if (ret) {
+		if (errno == EOPNOTSUPP) {
+			ret = 0;
+		} else {
+			ret = -errno;
+			goto out;
+		}
 	}
 
 	if (channels.max_combined == 0 || errno == EOPNOTSUPP) {
-- 
2.21.0