ASoC: Augment existing card DAPM routes in snd_soc_of_parse_audio_routing

If a snd_soc_card has any DAPM routes when it calls
snd_soc_of_parse_audio_routing, those are clobbered without this change.

Signed-off-by: Peter Rosin <peda@axentia.se>
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
index 443be00..b6e0e31 100644 (file)
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -4585,7 +4585,7 @@ int snd_soc_of_parse_audio_routing(struct snd_soc_card *card,
                                   const char *propname)
 {
        struct device_node *np = card->dev->of_node;
-       int num_routes;
+       int num_routes, old_routes;
        struct snd_soc_dapm_route *routes;
        int i, ret;
 
@@ -4603,7 +4603,9 @@ int snd_soc_of_parse_audio_routing(struct snd_soc_card *card,
                return -EINVAL;
        }
 
-       routes = devm_kzalloc(card->dev, num_routes * sizeof(*routes),
+       old_routes = card->num_dapm_routes;
+       routes = devm_kzalloc(card->dev,
+                             (old_routes + num_routes) * sizeof(*routes),
                              GFP_KERNEL);
        if (!routes) {
                dev_err(card->dev,
@@ -4611,9 +4613,11 @@ int snd_soc_of_parse_audio_routing(struct snd_soc_card *card,
                return -EINVAL;
        }
 
+       memcpy(routes, card->dapm_routes, old_routes * sizeof(*routes));
+
        for (i = 0; i < num_routes; i++) {
                ret = of_property_read_string_index(np, propname,
-                       2 * i, &routes[i].sink);
+                       2 * i, &routes[old_routes + i].sink);
                if (ret) {
                        dev_err(card->dev,
                                "ASoC: Property '%s' index %d could not be read: %d\n",
@@ -4621,7 +4625,7 @@ int snd_soc_of_parse_audio_routing(struct snd_soc_card *card,
                        return -EINVAL;
                }
                ret = of_property_read_string_index(np, propname,
-                       (2 * i) + 1, &routes[i].source);
+                       (2 * i) + 1, &routes[old_routes + i].source);
                if (ret) {
                        dev_err(card->dev,
                                "ASoC: Property '%s' index %d could not be read: %d\n",
@@ -4630,7 +4634,7 @@ int snd_soc_of_parse_audio_routing(struct snd_soc_card *card,
                }
        }
 
-       card->num_dapm_routes = num_routes;
+       card->num_dapm_routes += num_routes;
        card->dapm_routes = routes;
 
        return 0;