ASoC: soc-core.c: Prefer to return dai->driver->name in snd_soc_dai_name_get()

ASoC machine driver can use snd_soc_{of_}get_dlc() (A) to get DAI name
for dlc (snd_soc_dai_link_component). In this function call
dlc->dai_name is parsed via snd_soc_dai_name_get() (B).

(A) int snd_soc_get_dlc(...)
{
...
(B) dlc->dai_name = snd_soc_dai_name_get(dai);
...
}

(B) has a priority to return dai->name as dlc->dai_name. In most cases
card can probe successfully. However it has an issue that ASoC tries to
rebind card. Here is a simplified flow for example:

| a) Card probes successfully at first
| b) One of the component bound to this card is removed for some
| reason the component->dev is released
| c) That component is re-registered
v d) ASoC calls snd_soc_try_rebind_card()

a) points dlc->dai_name to dai->name. b) releases all resource of the
old DAI. c) creates new DAI structure. In result d) can not use
dlc->dai_name to add new created DAI.

So it's reasonable that prefer to return dai->driver->name in
snd_soc_dai_name_get() because dai->driver is a pre-defined global
variable. Also update snd_soc_is_matching_dai() for alignment.

Signed-off-by: Chancel Liu <[e-mail]>
Link: https://msgid.link/r/[e-mail]
Signed-off-by: Mark Brown <[e-mail]>

sound/soc/soc-core.c

···
 
 	/* see snd_soc_dai_name_get() */
 
-	if (strcmp(dlc->dai_name, dai->name) == 0)
-		return 1;
-
 	if (dai->driver->name &&
 	    strcmp(dlc->dai_name, dai->driver->name) == 0)
+		return 1;
+
+	if (strcmp(dlc->dai_name, dai->name) == 0)
 		return 1;
 
 	if (dai->component->name &&
···
 const char *snd_soc_dai_name_get(struct snd_soc_dai *dai)
 {
 	/* see snd_soc_is_matching_dai() */
-	if (dai->name)
-		return dai->name;
-
 	if (dai->driver->name)
 		return dai->driver->name;
+
+	if (dai->name)
+		return dai->name;
 
 	if (dai->component->name)
 		return dai->component->name;