[dpdk-dev] [PATCH] net/sfc: fix error path inconsistency

[Ivan Malov <ivan.malov@oktetlabs.ru>]

At the fail label, there's a statement to set general errno and
error message. However, before the label is reached, a custom
error message can be set by the code which parses actions.
This custom (action-specific) message, when present,
must not be replaced by the general one.

Fixes: 662286ae61d2 ("net/sfc: add actions parsing stub to MAE backend")
Cc: stable@dpdk.org

Signed-off-by: Ivan Malov <ivan.malov@oktetlabs.ru>
Signed-off-by: Andrew Rybchenko <andrew.rybchenko@oktetlabs.ru>
Reviewed-by: Andy Moreton <amoreton@xilinx.com>
---
 drivers/net/sfc/sfc_mae.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/net/sfc/sfc_mae.c b/drivers/net/sfc/sfc_mae.c
index 8afa09341..4dafe3dcd 100644
--- a/drivers/net/sfc/sfc_mae.c
+++ b/drivers/net/sfc/sfc_mae.c
@@ -2634,6 +2634,8 @@ sfc_mae_rule_parse_actions(struct sfc_adapter *sa,
 	efx_mae_actions_t *spec;
 	int rc;
 
+	rte_errno = 0;
+
 	if (actions == NULL) {
 		return rte_flow_error_set(error, EINVAL,
 				RTE_FLOW_ERROR_TYPE_ACTION_NUM, NULL,
@@ -2690,7 +2692,7 @@ sfc_mae_rule_parse_actions(struct sfc_adapter *sa,
 	efx_mae_action_set_spec_fini(sa->nic, spec);
 
 fail_action_set_spec_init:
-	if (rc > 0) {
+	if (rc > 0 && rte_errno == 0) {
 		rc = rte_flow_error_set(error, rc,
 			RTE_FLOW_ERROR_TYPE_UNSPECIFIED,
 			NULL, "Failed to process the action");
-- 
2.20.1