[PATCH] net/mlx5: fix devargs validation for multiclass probe

[michaelba at nvidia.com]

From: Michael Baum <michaelba at nvidia.com>

The mlx5_args function reads the devargs and checks if they are valid
for this driver and if not it returns an error.

This was normal behavior as long as all the devargs come to this driver,
but since it is possible to run several drivers together, the function
may return an error for another driver's devarg even though it is
completely valid.
In addition the function does not allow the user to know which of the
devargs he sent is incorrect, but returns an error without printing the
unknown devarg.

This patch eliminates the error return in the case of an unknown devarg,
and prints a warning for each such devarg specifically.

Fixes: 7b4f1e6bd367 ("common/mlx5: introduce common library")
Cc: stable at dpdk.org

Signed-off-by: Michael Baum <michaelba at nvidia.com>
Acked-by: Matan Azrad <matan at nvidia.com>
---
 drivers/net/mlx5/mlx5.c | 68 ++++++-----------------------------------
 1 file changed, 9 insertions(+), 59 deletions(-)

diff --git a/drivers/net/mlx5/mlx5.c b/drivers/net/mlx5/mlx5.c
index 4e04817d11..aa5f313c1a 100644
--- a/drivers/net/mlx5/mlx5.c
+++ b/drivers/net/mlx5/mlx5.c
@@ -1975,9 +1975,9 @@ mlx5_args_check(const char *key, const char *val, void *opaque)
 		config->std_delay_drop = !!(tmp & MLX5_DELAY_DROP_STANDARD);
 		config->hp_delay_drop = !!(tmp & MLX5_DELAY_DROP_HAIRPIN);
 	} else {
-		DRV_LOG(WARNING, "%s: unknown parameter", key);
-		rte_errno = EINVAL;
-		return -rte_errno;
+		DRV_LOG(WARNING,
+			"%s: unknown parameter, maybe it's for another class.",
+			key);
 	}
 	return 0;
 }
@@ -1996,75 +1996,25 @@ mlx5_args_check(const char *key, const char *val, void *opaque)
 int
 mlx5_args(struct mlx5_dev_config *config, struct rte_devargs *devargs)
 {
-	const char **params = (const char *[]){
-		MLX5_DRIVER_KEY,
-		MLX5_RXQ_CQE_COMP_EN,
-		MLX5_RXQ_PKT_PAD_EN,
-		MLX5_RX_MPRQ_EN,
-		MLX5_RX_MPRQ_LOG_STRIDE_NUM,
-		MLX5_RX_MPRQ_LOG_STRIDE_SIZE,
-		MLX5_RX_MPRQ_MAX_MEMCPY_LEN,
-		MLX5_RXQS_MIN_MPRQ,
-		MLX5_TXQ_INLINE,
-		MLX5_TXQ_INLINE_MIN,
-		MLX5_TXQ_INLINE_MAX,
-		MLX5_TXQ_INLINE_MPW,
-		MLX5_TXQS_MIN_INLINE,
-		MLX5_TXQS_MAX_VEC,
-		MLX5_TXQ_MPW_EN,
-		MLX5_TXQ_MPW_HDR_DSEG_EN,
-		MLX5_TXQ_MAX_INLINE_LEN,
-		MLX5_TX_DB_NC,
-		MLX5_TX_PP,
-		MLX5_TX_SKEW,
-		MLX5_TX_VEC_EN,
-		MLX5_RX_VEC_EN,
-		MLX5_L3_VXLAN_EN,
-		MLX5_VF_NL_EN,
-		MLX5_DV_ESW_EN,
-		MLX5_DV_FLOW_EN,
-		MLX5_DV_XMETA_EN,
-		MLX5_LACP_BY_USER,
-		MLX5_MR_EXT_MEMSEG_EN,
-		MLX5_REPRESENTOR,
-		MLX5_MAX_DUMP_FILES_NUM,
-		MLX5_LRO_TIMEOUT_USEC,
-		RTE_DEVARGS_KEY_CLASS,
-		MLX5_HP_BUF_SIZE,
-		MLX5_RECLAIM_MEM,
-		MLX5_SYS_MEM_EN,
-		MLX5_DECAP_EN,
-		MLX5_ALLOW_DUPLICATE_PATTERN,
-		MLX5_MR_MEMPOOL_REG_EN,
-		MLX5_DELAY_DROP,
-		NULL,
-	};
 	struct rte_kvargs *kvlist;
 	int ret = 0;
-	int i;
 
 	if (devargs == NULL)
 		return 0;
 	/* Following UGLY cast is done to pass checkpatch. */
-	kvlist = rte_kvargs_parse(devargs->args, params);
+	kvlist = rte_kvargs_parse(devargs->args, NULL);
 	if (kvlist == NULL) {
 		rte_errno = EINVAL;
 		return -rte_errno;
 	}
 	/* Process parameters. */
-	for (i = 0; (params[i] != NULL); ++i) {
-		if (rte_kvargs_count(kvlist, params[i])) {
-			ret = rte_kvargs_process(kvlist, params[i],
-						 mlx5_args_check, config);
-			if (ret) {
-				rte_errno = EINVAL;
-				rte_kvargs_free(kvlist);
-				return -rte_errno;
-			}
-		}
+	ret = rte_kvargs_process(kvlist, NULL, mlx5_args_check, config);
+	if (ret) {
+		rte_errno = EINVAL;
+		ret = -rte_errno;
 	}
 	rte_kvargs_free(kvlist);
-	return 0;
+	return ret;
 }
 
 /**
-- 
2.25.1