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| author | Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> | 2024-05-01 19:51:27 +0200 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2024-05-02 05:57:25 +0200 |
| commit | 9723cab054d59d770cd1927f92fe315c26cc6a78 (patch) | |
| tree | 30bd54ce233eb0d281f22de9f1a7d21b4f700a76 /include/sound/soc.h | |
| parent | ASoC: doc: dapm: various improvements (diff) | |
| download | linux-9723cab054d59d770cd1927f92fe315c26cc6a78.tar.xz linux-9723cab054d59d770cd1927f92fe315c26cc6a78.zip | |
ASoC: Use inline function for type safety in snd_soc_substream_to_rtd()
A common pattern in sound drivers is getting 'struct snd_soc_pcm_runtime'
from 'struct snd_pcm_substream' opaque pointer private_data field with
snd_soc_substream_to_rtd(). However 'private_data' appears in several
other structures as well, including 'struct snd_compr_stream'. The
field might not hold the same type for every structure, although seems
the case at least for 'struct snd_compr_stream', so code can easily make
a mistake by using macro for wrong structure passed as argument.
Switch from macro to inline function, so such mistake will be build-time
detectable.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20240501175127.34301-1-krzysztof.kozlowski@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'include/sound/soc.h')
| -rw-r--r-- | include/sound/soc.h | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/include/sound/soc.h b/include/sound/soc.h index 8aa6ddb7ee1e..33671437ee89 100644 --- a/include/sound/soc.h +++ b/include/sound/soc.h @@ -1215,8 +1215,12 @@ struct snd_soc_pcm_runtime { /* see soc_new_pcm_runtime() */ #define snd_soc_rtd_to_cpu(rtd, n) (rtd)->dais[n] #define snd_soc_rtd_to_codec(rtd, n) (rtd)->dais[n + (rtd)->dai_link->num_cpus] -#define snd_soc_substream_to_rtd(substream) \ - (struct snd_soc_pcm_runtime *)snd_pcm_substream_chip(substream) + +static inline struct snd_soc_pcm_runtime * +snd_soc_substream_to_rtd(const struct snd_pcm_substream *substream) +{ + return snd_pcm_substream_chip(substream); +} #define for_each_rtd_components(rtd, i, component) \ for ((i) = 0, component = NULL; \ |