X-Git-Url: http://sigrok.org/gitweb/?a=blobdiff_plain;f=hardware%2Fdemo%2Fdemo.c;h=1328c4cfc586869d18b5d9db46bfcd76afbfbdfc;hb=e73ffd4238c6d1be58d3fcdcf7f100200f033856;hp=1619be24c9e2d927910379c9ccf9948c5b21f6af;hpb=efdecf4c0553ce00ea2a6365212f5fe305496fed;p=libsigrok.git

diff --git a/hardware/demo/demo.c b/hardware/demo/demo.c
index 1619be24..1328c4cf 100644
--- a/hardware/demo/demo.c
+++ b/hardware/demo/demo.c
@@ -212,7 +212,7 @@ static int hw_dev_open(struct sr_dev_inst *sdi)
 {
 	(void)sdi;
 
-	/* Nothing needed so far. */
+	sdi->status = SR_ST_ACTIVE;
 
 	return SR_OK;
 }
@@ -221,7 +221,7 @@ static int hw_dev_close(struct sr_dev_inst *sdi)
 {
 	(void)sdi;
 
-	/* Nothing needed so far. */
+    sdi->status = SR_ST_INACTIVE;
 
 	return SR_OK;
 }
@@ -299,6 +299,9 @@ static int config_set(int id, GVariant *data, const struct sr_dev_inst *sdi)
 
 	struct dev_context *const devc = sdi->priv;
 
+	if (sdi->status != SR_ST_ACTIVE)
+		return SR_ERR_DEV_CLOSED;
+
 	if (id == SR_CONF_SAMPLERATE) {
 		devc->cur_samplerate = g_variant_get_uint64(data);
 		sr_dbg("%s: setting samplerate to %" PRIu64, __func__,
@@ -460,6 +463,9 @@ static int hw_dev_acquisition_start(const struct sr_dev_inst *sdi,
 {
 	struct dev_context *const devc = sdi->priv;
 
+	if (sdi->status != SR_ST_ACTIVE)
+		return SR_ERR_DEV_CLOSED;
+
 	devc->cb_data = cb_data;
 	devc->samples_counter = 0;