[PATCH v6 2/4] net/sfc: use new API to parse kvargs

[Chengwen Feng <fengchengwen@huawei.com>]

Add sfc_kvargs_process_opt() function to handle only-key case, and
remove redundancy NULL judgement of value because the rte_kvargs_process
(which invoked in sfc_kvargs_process()) will handle it.

Signed-off-by: Chengwen Feng <fengchengwen@huawei.com>
---
 drivers/common/sfc_efx/sfc_efx.c |  3 ---
 drivers/net/sfc/sfc_ethdev.c     | 12 ++++++------
 drivers/net/sfc/sfc_kvargs.c     | 12 +++++++++++-
 drivers/net/sfc/sfc_kvargs.h     |  2 ++
 4 files changed, 19 insertions(+), 10 deletions(-)

diff --git a/drivers/common/sfc_efx/sfc_efx.c b/drivers/common/sfc_efx/sfc_efx.c
index 5eeffb065b..458efacba5 100644
--- a/drivers/common/sfc_efx/sfc_efx.c
+++ b/drivers/common/sfc_efx/sfc_efx.c
@@ -23,9 +23,6 @@ sfc_efx_kvarg_dev_class_handler(__rte_unused const char *key,
 {
 	enum sfc_efx_dev_class *dev_class = opaque;
 
-	if (class_str == NULL)
-		return *dev_class;
-
 	if (strcmp(class_str, "vdpa") == 0) {
 		*dev_class = SFC_EFX_DEV_CLASS_VDPA;
 	} else if (strcmp(class_str, "net") == 0) {
diff --git a/drivers/net/sfc/sfc_ethdev.c b/drivers/net/sfc/sfc_ethdev.c
index 3480a51642..89444f0b4a 100644
--- a/drivers/net/sfc/sfc_ethdev.c
+++ b/drivers/net/sfc/sfc_ethdev.c
@@ -2835,8 +2835,8 @@ sfc_eth_dev_set_ops(struct rte_eth_dev *dev)
 	if (encp->enc_rx_es_super_buffer_supported)
 		avail_caps |= SFC_DP_HW_FW_CAP_RX_ES_SUPER_BUFFER;
 
-	rc = sfc_kvargs_process(sa, SFC_KVARG_RX_DATAPATH,
-				sfc_kvarg_string_handler, &rx_name);
+	rc = sfc_kvargs_process_opt(sa, SFC_KVARG_RX_DATAPATH,
+				    sfc_kvarg_string_handler, &rx_name);
 	if (rc != 0)
 		goto fail_kvarg_rx_datapath;
 
@@ -2878,8 +2878,8 @@ sfc_eth_dev_set_ops(struct rte_eth_dev *dev)
 
 	sfc_notice(sa, "use %s Rx datapath", sas->dp_rx_name);
 
-	rc = sfc_kvargs_process(sa, SFC_KVARG_TX_DATAPATH,
-				sfc_kvarg_string_handler, &tx_name);
+	rc = sfc_kvargs_process_opt(sa, SFC_KVARG_TX_DATAPATH,
+				    sfc_kvarg_string_handler, &tx_name);
 	if (rc != 0)
 		goto fail_kvarg_tx_datapath;
 
@@ -3073,8 +3073,8 @@ sfc_parse_switch_mode(struct sfc_adapter *sa, bool has_representors)
 
 	sfc_log_init(sa, "entry");
 
-	rc = sfc_kvargs_process(sa, SFC_KVARG_SWITCH_MODE,
-				sfc_kvarg_string_handler, &switch_mode);
+	rc = sfc_kvargs_process_opt(sa, SFC_KVARG_SWITCH_MODE,
+				    sfc_kvarg_string_handler, &switch_mode);
 	if (rc != 0)
 		goto fail_kvargs;
 
diff --git a/drivers/net/sfc/sfc_kvargs.c b/drivers/net/sfc/sfc_kvargs.c
index 783cb43ae6..eb36fa98ca 100644
--- a/drivers/net/sfc/sfc_kvargs.c
+++ b/drivers/net/sfc/sfc_kvargs.c
@@ -73,6 +73,16 @@ sfc_kvargs_process(struct sfc_adapter *sa, const char *key_match,
 	return -rte_kvargs_process(sa->kvargs, key_match, handler, opaque_arg);
 }
 
+int
+sfc_kvargs_process_opt(struct sfc_adapter *sa, const char *key_match,
+		       arg_handler_t handler, void *opaque_arg)
+{
+	if (sa->kvargs == NULL)
+		return 0;
+
+	return -rte_kvargs_process_opt(sa->kvargs, key_match, handler, opaque_arg);
+}
+
 int
 sfc_kvarg_bool_handler(__rte_unused const char *key,
 		       const char *value_str, void *opaque)
@@ -104,7 +114,7 @@ sfc_kvarg_long_handler(__rte_unused const char *key,
 	long value;
 	char *endptr;
 
-	if (!value_str || !opaque)
+	if (!opaque)
 		return -EINVAL;
 
 	value = strtol(value_str, &endptr, 0);
diff --git a/drivers/net/sfc/sfc_kvargs.h b/drivers/net/sfc/sfc_kvargs.h
index 2226f2b3d9..4dcc61e973 100644
--- a/drivers/net/sfc/sfc_kvargs.h
+++ b/drivers/net/sfc/sfc_kvargs.h
@@ -83,6 +83,8 @@ void sfc_kvargs_cleanup(struct sfc_adapter *sa);
 
 int sfc_kvargs_process(struct sfc_adapter *sa, const char *key_match,
 		       arg_handler_t handler, void *opaque_arg);
+int sfc_kvargs_process_opt(struct sfc_adapter *sa, const char *key_match,
+			   arg_handler_t handler, void *opaque_arg);
 
 int sfc_kvarg_bool_handler(const char *key, const char *value_str,
 			   void *opaque);
-- 
2.17.1