audiod: Fix a memory leak in parse_receiver_args().

If multiple receivers are given, we leak the config structure of
all but the last one.

Clean up a comment further down in the function while we're at it.

diff --git a/audiod.c b/audiod.c
index 64ea8a51efeeb13cb65f86d1ea417120679ff2f4..8b17d95fba692db0b2dd9126226cb8fb2cb682d5 100644 (file)
--- a/audiod.c
+++ b/audiod.c
@@ -823,6 +823,14 @@ static int parse_receiver_args(void)
                ret = get_audio_format_num(arg);
                if (ret < 0)
                        goto out;
+               /*
+                * If multiple receivers are given for this audio format, the
+                * last one wins and we have to free the previous receiver
+                * config here. Since we are iterating backwards, the winning
+                * receiver arg is in fact the first one given.
+                */
+               if (afi[ret].receiver_conf)
+                       afi[ret].receiver->free_config(afi[ret].receiver_conf);
                afi[ret].receiver_conf = check_receiver_arg(recv_arg, &receiver_num);
                if (!afi[ret].receiver_conf) {
                        ret = -E_RECV_SYNTAX;
@@ -830,9 +838,9 @@ static int parse_receiver_args(void)
                }
                afi[ret].receiver = &receivers[receiver_num];
        }
-       /* use the first available receiver with no arguments
-        * for those audio formats for which no receiver
-        * was specified
+       /*
+        * Use the first available receiver with no arguments for those audio
+        * formats for which no receiver was specified.
         */
        cmd = para_strdup(receivers[0].name);
        FOR_EACH_AUDIO_FORMAT(i) {