Enforce open device before config_set()/dev_acquisition_start()

[libsigrok.git] / hardware / demo / demo.c

diff --git a/hardware/demo/demo.c b/hardware/demo/demo.c
index 1619be24c9e2d927910379c9ccf9948c5b21f6af..1328c4cfc586869d18b5d9db46bfcd76afbfbdfc 100644 (file)
--- 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;