std_gvar_tuple_array(): Change to allow for more ARRAY_AND_SIZE usage.

[libsigrok.git] / src / hwdriver.c

diff --git a/src/hwdriver.c b/src/hwdriver.c
index 5378d74adf32a4460e2dd16482ff707d8fecbbf9..cad75e13b0800246f35f9ecfcdebdb5f22c5bb0e 100644 (file)
--- a/src/hwdriver.c
+++ b/src/hwdriver.c
@@ -820,6 +820,10 @@ SR_API int sr_config_set(const struct sr_dev_inst *sdi,
 
        g_variant_unref(data);
 
+       if (ret == SR_ERR_CHANNEL_GROUP)
+               sr_err("%s: No channel group specified.",
+                       (sdi) ? sdi->driver->name : "unknown");
+
        return ret;
 }
 
@@ -861,6 +865,9 @@ SR_API int sr_config_commit(const struct sr_dev_inst *sdi)
  * @param[in] cg The channel group on the device instance for which to list
  *            the values, or NULL. If this device instance doesn't
  *            have channel groups, this must not be != NULL.
+ *            If cg is NULL, this function will return the "common" device
+ *            instance options that are channel-group independent. Otherwise
+ *            it will return the channel-group specific options.
  * @param[in] key The configuration key (SR_CONF_*).
  * @param[in,out] data A pointer to a GVariant where the list will be stored.
  *                The caller is given ownership of the GVariant and must thus