Without this, if tegra_wm8903 is modified to provide controls, widgets, and routes through data rather than calling registration functions, tegra_wm8903_event_* will crash, because w->codec==NULL.
Within snd_soc_instantiate_card, something inside soc_probe_dai_link is required for snd_soc_dapm_new_controls to set up the new widgets correctly, although I haven't tracked down what exactly. (For tegra_wm8903, there is no card->probe, and no aux_devs, so those calls aren't relevant).
Signed-off-by: Stephen Warren swarren@nvidia.com --- sound/soc/soc-core.c | 8 ++++---- 1 files changed, 4 insertions(+), 4 deletions(-)
diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c index 3b3a377..8ce40a1 100644 --- a/sound/soc/soc-core.c +++ b/sound/soc/soc-core.c @@ -1878,10 +1878,6 @@ static void snd_soc_instantiate_card(struct snd_soc_card *card) INIT_WORK(&card->deferred_resume_work, soc_resume_deferred); #endif
- if (card->dapm_widgets) - snd_soc_dapm_new_controls(&card->dapm, card->dapm_widgets, - card->num_dapm_widgets); - /* initialise the sound card only once */ if (card->probe) { ret = card->probe(card); @@ -1907,6 +1903,10 @@ static void snd_soc_instantiate_card(struct snd_soc_card *card) } }
+ if (card->dapm_widgets) + snd_soc_dapm_new_controls(&card->dapm, card->dapm_widgets, + card->num_dapm_widgets); + /* We should have a non-codec control add function but we don't */ if (card->controls) snd_soc_add_controls(list_first_entry(&card->codec_dev_list,