Index: uspace/lib/drv/generic/remote_audio_pcm.c
===================================================================
--- uspace/lib/drv/generic/remote_audio_pcm.c	(revision 74017cef2e4edaf9405cf38ba4b0958f664e700c)
+++ uspace/lib/drv/generic/remote_audio_pcm.c	(revision 6deb2cdd4f9ffa23e068faa9b3d977ec3399c1ed)
@@ -221,18 +221,15 @@
  * @param sess Audio device session.
  * @param cap  Audio device capability.
- * @param val  Place to store queried value.
- *
- * @return Error code.
- */
-int audio_pcm_query_cap(audio_pcm_sess_t *sess, audio_cap_t cap)
-{
-	async_exch_t *exch = async_exchange_begin(sess);
-	sysarg_t value = 0;
+ * @param[out] val  Place to store queried value.
+ *
+ * @return Error code.
+ */
+int audio_pcm_query_cap(audio_pcm_sess_t *sess, audio_cap_t cap, sysarg_t *value)
+{
+	async_exch_t *exch = async_exchange_begin(sess);
 	const int ret = async_req_2_1(exch,
 	    DEV_IFACE_ID(AUDIO_PCM_BUFFER_IFACE), IPC_M_AUDIO_PCM_QUERY_CAPS,
-	    cap, &value);
-	async_exchange_end(exch);
-	if (ret == EOK)
-		return value;
+	    cap, value);
+	async_exchange_end(exch);
 	return ret;
 }