ASoC: Track which components have been registered with snd_soc_register_component()

snd_soc_unregister_component() takes the parent device of the component as a
parameter and then looks up the component based on this. This is a problem if
multiple components are registered for the same parent device. Currently drivers
do not do this, but some drivers register a CPU DAI component and a platform for
the same parent device. This will become a problem once platforms are also made
components. To make sure that snd_soc_unregister_component() will not
accidentally unregister the platform in such a case only consider components
that were registered with snd_soc_register_component(). This is only meant as
short term stopgap solution to be able to continue componentisation. Long term
we'll need something different.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Mark Brown <broonie@linaro.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/include/sound/soc.h b/include/sound/soc.h
index a355d0f9a6f9..f8a79c17628e 100644
--- a/include/sound/soc.h
+++ b/include/sound/soc.h
@@ -662,6 +662,7 @@ struct snd_soc_component {
         unsigned int active;
 
         unsigned int ignore_pmdown_time:1; /* pmdown_time is ignored at stop */
+        unsigned int registered_as_component:1;
 
         struct list_head list;