[PATCH V3 1/3] net/mlx5: set rte errno if malloc failed

[Minggang Li(Gavin)]

rte_errno should be set if anything wrong happened in under layer so that
user can figure out what's going on.

There were some cases that did not set it when ipool allocation failed. To
fix the issue, set rte_errno to ENOMEM if mlx5_ipool_malloc failed to
allocate ID.

Fixes: c40c061a022e ("net/mlx5: add basic flow queue operation")
Fixes: 48fbb0e93d06 ("net/mlx5: support flow meter mark indirect action with HWS")
cc: stable at dpdk.org
Signed-off-by: Minggang Li(Gavin) <gavinl at nvidia.com>
Acked-by: Bing Zhao <bingz at nvidia.com>
---
 drivers/net/mlx5/mlx5_flow_hw.c | 31 ++++++++++++++++++++++++-------
 1 file changed, 24 insertions(+), 7 deletions(-)

diff --git a/drivers/net/mlx5/mlx5_flow_hw.c b/drivers/net/mlx5/mlx5_flow_hw.c
index a275154d4b..f34670b3ec 100644
--- a/drivers/net/mlx5/mlx5_flow_hw.c
+++ b/drivers/net/mlx5/mlx5_flow_hw.c
@@ -1905,7 +1905,7 @@ flow_hw_meter_mark_alloc(struct rte_eth_dev *dev, uint32_t queue,
 	const struct rte_flow_action_meter_mark *meter_mark = action->conf;
 	struct mlx5_aso_mtr *aso_mtr;
 	struct mlx5_flow_meter_info *fm;
-	uint32_t mtr_id;
+	uint32_t mtr_id = 0;
 	uintptr_t handle = (uintptr_t)MLX5_INDIRECT_ACTION_TYPE_METER_MARK <<
 					MLX5_INDIRECT_ACTION_TYPE_OFFSET;
 
@@ -1917,8 +1917,15 @@ flow_hw_meter_mark_alloc(struct rte_eth_dev *dev, uint32_t queue,
 	if (meter_mark->profile == NULL)
 		return NULL;
 	aso_mtr = mlx5_ipool_malloc(pool->idx_pool, &mtr_id);
-	if (!aso_mtr)
+	if (!aso_mtr) {
+		rte_flow_error_set(error, ENOMEM,
+				   RTE_FLOW_ERROR_TYPE_UNSPECIFIED,
+				   NULL,
+				   "failed to allocate aso meter entry");
+		if (mtr_id)
+			mlx5_ipool_free(pool->idx_pool, mtr_id);
 		return NULL;
+	}
 	/* Fill the flow meter parameters. */
 	aso_mtr->type = ASO_METER_INDIRECT;
 	fm = &aso_mtr->fm;
@@ -3926,8 +3933,10 @@ flow_hw_async_flow_create(struct rte_eth_dev *dev,
 			return NULL;
 	}
 	flow = mlx5_ipool_malloc(table->flow, &flow_idx);
-	if (!flow)
+	if (!flow) {
+		rte_errno = ENOMEM;
 		goto error;
+	}
 	rule_acts = flow_hw_get_dr_action_buffer(priv, table, action_template_index, queue);
 	/*
 	 * Set the table here in order to know the destination table
@@ -3938,8 +3947,10 @@ flow_hw_async_flow_create(struct rte_eth_dev *dev,
 	flow->idx = flow_idx;
 	if (table->resource) {
 		mlx5_ipool_malloc(table->resource, &res_idx);
-		if (!res_idx)
+		if (!res_idx) {
+			rte_errno = ENOMEM;
 			goto error;
+		}
 		flow->res_idx = res_idx;
 	} else {
 		flow->res_idx = flow_idx;
@@ -4070,8 +4081,10 @@ flow_hw_async_flow_create_by_index(struct rte_eth_dev *dev,
 			return NULL;
 	}
 	flow = mlx5_ipool_malloc(table->flow, &flow_idx);
-	if (!flow)
+	if (!flow) {
+		rte_errno = ENOMEM;
 		goto error;
+	}
 	rule_acts = flow_hw_get_dr_action_buffer(priv, table, action_template_index, queue);
 	/*
 	 * Set the table here in order to know the destination table
@@ -4082,8 +4095,10 @@ flow_hw_async_flow_create_by_index(struct rte_eth_dev *dev,
 	flow->idx = flow_idx;
 	if (table->resource) {
 		mlx5_ipool_malloc(table->resource, &res_idx);
-		if (!res_idx)
+		if (!res_idx) {
+			rte_errno = ENOMEM;
 			goto error;
+		}
 		flow->res_idx = res_idx;
 	} else {
 		flow->res_idx = flow_idx;
@@ -4218,8 +4233,10 @@ flow_hw_async_flow_update(struct rte_eth_dev *dev,
 	nf->idx = of->idx;
 	if (table->resource) {
 		mlx5_ipool_malloc(table->resource, &res_idx);
-		if (!res_idx)
+		if (!res_idx) {
+			rte_errno = ENOMEM;
 			goto error;
+		}
 		nf->res_idx = res_idx;
 	} else {
 		nf->res_idx = of->res_idx;
-- 
2.34.1