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 chancel.liu@nxp.com --- changes in v2: - update snd_soc_is_matching_dai() for alignment changes in v3: - resolve conflicts when applying patch, no others changed

sound/soc/soc-core.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c index 507cd3015ff4..1e94edba12eb 100644 --- a/sound/soc/soc-core.c +++ b/sound/soc/soc-core.c @@ -283,13 +283,13 @@ static int snd_soc_is_matching_dai(const struct snd_soc_dai_link_component *dlc,

/* 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 && strcmp(dlc->dai_name, dai->component->name) == 0) return 1; @@ -300,12 +300,12 @@ static int snd_soc_is_matching_dai(const struct snd_soc_dai_link_component *dlc, 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;

-- 2.43.0