We set the cpu_dai capture_ or playback_widget on widget_ready but never clear them, which leads to failures when unloading/reloading a topology in modprobe/rmmod tests

BugLink: https://github.com/thesofproject/linux/issues/3535 Fixes: 311ce4fe7637 ("ASoC: SOF: Add support for loading topologies") Signed-off-by: Pierre-Louis Bossart pierre-louis.bossart@linux.intel.com Reviewed-by: Ranjani Sridharan ranjani.sridharan@linux.intel.com Reviewed-by: Péter Ujfalusi peter.ujfalusi@linux.intel.com Reviewed-by: Bard Liao yung-chuan.liao@linux.intel.com --- sound/soc/sof/topology.c | 43 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 43 insertions(+)

diff --git a/sound/soc/sof/topology.c b/sound/soc/sof/topology.c index f7e1de860931..c3f264f01e21 100644 --- a/sound/soc/sof/topology.c +++ b/sound/soc/sof/topology.c @@ -1081,6 +1081,46 @@ static int sof_connect_dai_widget(struct snd_soc_component *scomp, return 0; }

+static void sof_disconnect_dai_widget(struct snd_soc_component *scomp, + struct snd_soc_dapm_widget *w) +{ + struct snd_soc_card *card = scomp->card; + struct snd_soc_pcm_runtime *rtd; + struct snd_soc_dai *cpu_dai; + int i; + + if (!w->sname) + return; + + list_for_each_entry(rtd, &card->rtd_list, list) { + /* does stream match DAI link ? */ + if (!rtd->dai_link->stream_name || + strcmp(w->sname, rtd->dai_link->stream_name)) + continue; + + switch (w->id) { + case snd_soc_dapm_dai_out: + for_each_rtd_cpu_dais(rtd, i, cpu_dai) { + if (cpu_dai->capture_widget == w) { + cpu_dai->capture_widget = NULL; + break; + } + } + break; + case snd_soc_dapm_dai_in: + for_each_rtd_cpu_dais(rtd, i, cpu_dai) { + if (cpu_dai->playback_widget == w) { + cpu_dai->playback_widget = NULL; + break; + } + } + break; + default: + break; + } + } +} + /* bind PCM ID to host component ID */ static int spcm_bind(struct snd_soc_component *scomp, struct snd_sof_pcm *spcm, int dir) @@ -1366,6 +1406,9 @@ static int sof_widget_unload(struct snd_soc_component *scomp,

if (dai) list_del(&dai->list); + + sof_disconnect_dai_widget(scomp, widget); + break; default: break;