ASoC: Fix binding and probing of auxiliary components

Currently binding of auxiliary devices doesn't work as in
soc_bind_aux_dev() function a bound component is not being added
to any list and in soc_probe_aux_devices() we are trying to walk
the component_dev_list list to probe auxiliary components but
at that time this list doesn't contain any auxiliary components
since they are being added to the card only in soc_probe_component().

This patch adds a list to the card where are stored bound but not
probed auxiliary devices, so that all aux devices can be probed.

Fixes: 1a653aa447 "ASoC: core: replace aux_comp_list to component_dev_list"
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

include/sound/soc.h

@@ -813,6 +813,7 @@ struct snd_soc_component {
 	unsigned int suspended:1; /* is in suspend PM state */
 
 	struct list_head list;
+	struct list_head card_aux_list; /* for auxiliary bound components */
 	struct list_head card_list;
 
 	struct snd_soc_dai_driver *dai_drv;
@@ -1152,6 +1153,7 @@ struct snd_soc_card {
 	 */
 	struct snd_soc_aux_dev *aux_dev;
 	int num_aux_devs;
+	struct list_head aux_comp_list;
 
 	const struct snd_kcontrol_new *controls;
 	int num_controls;
@@ -1547,6 +1549,7 @@ static inline void snd_soc_initialize_card_lists(struct snd_soc_card *card)
 	INIT_LIST_HEAD(&card->widgets);
 	INIT_LIST_HEAD(&card->paths);
 	INIT_LIST_HEAD(&card->dapm_list);
+	INIT_LIST_HEAD(&card->aux_comp_list);
 	INIT_LIST_HEAD(&card->component_dev_list);
 }
 

sound/soc/soc-core.c

@@ -1748,6 +1748,7 @@ static int soc_bind_aux_dev(struct snd_soc_card *card, int num)
 
 	component->init = aux_dev->init;
 	component->auxiliary = 1;
+	list_add(&component->card_aux_list, &card->aux_comp_list);
 
 	return 0;
 
@@ -1758,16 +1759,14 @@ err_defer:
 
 static int soc_probe_aux_devices(struct snd_soc_card *card)
 {
-	struct snd_soc_component *comp;
+	struct snd_soc_component *comp, *tmp;
 	int order;
 	int ret;
 
 	for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
 		order++) {
-		list_for_each_entry(comp, &card->component_dev_list, card_list) {
-			if (!comp->auxiliary)
-				continue;
-
+		list_for_each_entry_safe(comp, tmp, &card->aux_comp_list,
+					 card_aux_list) {
 			if (comp->driver->probe_order == order) {
 				ret = soc_probe_component(card,	comp);
 				if (ret < 0) {
@@ -1776,6 +1775,7 @@ static int soc_probe_aux_devices(struct snd_soc_card *card)
 						comp->name, ret);
 					return ret;
 				}
+				list_del(&comp->card_aux_list);
 			}
 		}
 	}