X-Git-Url: https://sigrok.org/gitweb/?a=blobdiff_plain;f=src%2Fhardware%2Fmotech-lps-30x%2Fapi.c;h=31bbfa43827f6c75fecb628bb461f093592fd51e;hb=42f6dd550257cc6a5ef227f76a168ea8db82bebb;hp=76184fb2815966ea32cb36517b57ae2b5635d68c;hpb=697fb6ddfc2522b2e6d35511c7837e2c61d8ae73;p=libsigrok.git

diff --git a/src/hardware/motech-lps-30x/api.c b/src/hardware/motech-lps-30x/api.c
index 76184fb2..31bbfa43 100644
--- a/src/hardware/motech-lps-30x/api.c
+++ b/src/hardware/motech-lps-30x/api.c
@@ -363,13 +363,12 @@ static GSList *do_scan(lps_modelid modelid, struct sr_dev_driver *drv, GSList *o
 
 	sdi = NULL;
 	devc = NULL;
-	conn = serialcomm = NULL;
 
 	/* Process and check options. */
+	conn = NULL;
+	serialcomm = SERIALCOMM;
 	if (sr_serial_extract_options(options, &conn, &serialcomm) != SR_OK)
 		return NULL;
-	if (!serialcomm)
-		serialcomm = SERIALCOMM;
 
 	/* Init serial port. */
 	serial = sr_serial_dev_inst_new(conn, serialcomm);
@@ -378,7 +377,6 @@ static GSList *do_scan(lps_modelid modelid, struct sr_dev_driver *drv, GSList *o
 		goto exit_err;
 
 	/* Query and verify model string. */
-	serial_flush(serial);
 	if (lps_cmd_reply(buf, serial, "MODEL") != SR_OK)
 		return NULL;
 
@@ -441,7 +439,7 @@ static GSList *do_scan(lps_modelid modelid, struct sr_dev_driver *drv, GSList *o
 		devc->channel_status[cnt].info = g_slist_append(NULL, ch);
 
 		cg = g_malloc(sizeof(struct sr_channel_group));
-		snprintf(channel, sizeof(channel), "CG%d", cnt+1);
+		snprintf(channel, sizeof(channel), "CG%d", cnt + 1);
 		cg->name = g_strdup(channel);
 		cg->priv = NULL;
 		cg->channels = g_slist_append(NULL, ch);
@@ -612,7 +610,6 @@ static int config_set(uint32_t key, GVariant *data,
 				return SR_ERR_NA;
 			devc->channel_status[ch_idx].output_current_max = dval;
 			return lps_cmd_ok(sdi->conn, "ISET%d %05.4f", ch_idx+1, dval);
-			break;
 		case SR_CONF_ENABLED:
 			bval = g_variant_get_boolean(data);
 			if (bval == devc->channel_status[ch_idx].output_enabled) /* Nothing to do. */
@@ -651,6 +648,8 @@ static int config_list(uint32_t key, GVariant **data,
 		case SR_CONF_DEVICE_OPTIONS:
 			return STD_CONFIG_LIST(key, data, sdi, cg, scanopts, drvopts, devopts);
 		case SR_CONF_CHANNEL_CONFIG:
+			if (!devc || !devc->model)
+				return SR_ERR_ARG;
 			if (devc->model->modelid <= LPS_303) {
 				/* The 1-channel models. */
 				*data = g_variant_new_strv(channel_modes, 1);
@@ -676,9 +675,13 @@ static int config_list(uint32_t key, GVariant **data,
 			*data = std_gvar_array_u32(ARRAY_AND_SIZE(devopts_cg_ch3));
 		break;
 	case SR_CONF_VOLTAGE_TARGET:
+		if (!devc || !devc->model)
+			return SR_ERR_ARG;
 		*data = std_gvar_min_max_step_array(devc->model->channels[ch_idx].voltage);
 		break;
 	case SR_CONF_CURRENT_LIMIT:
+		if (!devc || !devc->model)
+			return SR_ERR_ARG;
 		*data = std_gvar_min_max_step_array(devc->model->channels[ch_idx].current);
 		break;
 	default: