X-Git-Url: https://sigrok.org/gitweb/?a=blobdiff_plain;f=src%2Fhardware%2Fyokogawa-dlm%2Fapi.c;h=f80e83dceb7e91537252d05b37a516e12e225ac3;hb=d9a74e97f437d35abc32509a113fe2f5124559ef;hp=16983653a94ee45a4e239c11c69d9de41cb42a86;hpb=612336970dcf03c07a826e90cc562bb506edd029;p=libsigrok.git

diff --git a/src/hardware/yokogawa-dlm/api.c b/src/hardware/yokogawa-dlm/api.c
index 16983653..f80e83dc 100644
--- a/src/hardware/yokogawa-dlm/api.c
+++ b/src/hardware/yokogawa-dlm/api.c
@@ -164,6 +164,8 @@ static int check_channel_group(struct dev_context *devc,
 {
 	const struct scope_config *model;
 
+	if (!devc)
+		return CG_INVALID;
 	model = devc->model_config;
 
 	if (!cg)
@@ -211,22 +213,18 @@ static int config_get(uint32_t key, GVariant **data,
 		ret = SR_OK;
 		break;
 	case SR_CONF_NUM_VDIV:
-		if (!cg) {
+		if (!cg)
 			return SR_ERR_CHANNEL_GROUP;
-		} else if (cg_type == CG_ANALOG) {
-				*data = g_variant_new_int32(model->num_ydivs);
-				ret = SR_OK;
-				break;
-		} else {
-			ret = SR_ERR_NA;
-		}
+		if (cg_type != CG_ANALOG)
+			return SR_ERR_NA;
+		*data = g_variant_new_int32(model->num_ydivs);
+		ret = SR_OK;
 		break;
 	case SR_CONF_VDIV:
-		ret = SR_ERR_NA;
-		if (!cg) {
+		if (!cg)
 			return SR_ERR_CHANNEL_GROUP;
-		} else if (cg_type != CG_ANALOG)
-			break;
+		if (cg_type != CG_ANALOG)
+			return SR_ERR_NA;
 		if ((idx = std_cg_idx(cg, devc->analog_groups, model->analog_channels)) < 0)
 			return SR_ERR_ARG;
 		*data = g_variant_new("(tt)",
@@ -247,11 +245,10 @@ static int config_get(uint32_t key, GVariant **data,
 		ret = SR_OK;
 		break;
 	case SR_CONF_COUPLING:
-		ret = SR_ERR_NA;
-		if (!cg) {
+		if (!cg)
 			return SR_ERR_CHANNEL_GROUP;
-		} else if (cg_type != CG_ANALOG)
-			break;
+		if (cg_type != CG_ANALOG)
+			return SR_ERR_NA;
 		if ((idx = std_cg_idx(cg, devc->analog_groups, model->analog_channels)) < 0)
 			return SR_ERR_ARG;
 		*data = g_variant_new_string((*model->coupling_options)[state->analog_states[idx].coupling]);
@@ -289,8 +286,6 @@ static int config_set(uint32_t key, GVariant *data,
 	state = devc->model_state;
 	update_sample_rate = FALSE;
 
-	ret = SR_ERR_NA;
-
 	switch (key) {
 	case SR_CONF_LIMIT_FRAMES:
 		devc->frame_limit = g_variant_get_uint64(data);
@@ -414,6 +409,8 @@ static int config_list(uint32_t key, GVariant **data,
 			*data = g_variant_new_strv(ARRAY_AND_SIZE(dlm_trigger_slopes));
 			return SR_OK;
 		case SR_CONF_NUM_HDIV:
+			if (!model)
+				return SR_ERR_ARG;
 			*data = g_variant_new_uint32(model->num_xdivs);
 			return SR_OK;
 		default: