From d20e834e13ce349c9b901b9dd8b7013e255083e8 Mon Sep 17 00:00:00 2001 From: Pierre-Louis Bossart Date: Sat, 5 Sep 2020 02:28:52 +0800 Subject: ASoC: soc-dai: clarify return value for get_sdw_stream() Previous changes move to use ERR_PTR(-ENOTSUPP), but it's not clear what implementations can return in case of errors. Explicitly document that NULL is not a possible return value, only ERR_PTR with a negative error code is valid. Fixes: 308811a327c38 ('ASoC: soc-dai: return proper error for get_sdw_stream()') Cc: Srinivas Kandagatla Reported-by: Bard Liao Signed-off-by: Pierre-Louis Bossart Reviewed-by: Rander Wang Signed-off-by: Bard Liao Link: https://lore.kernel.org/r/20200904182854.3944-2-yung-chuan.liao@linux.intel.com Signed-off-by: Mark Brown --- include/sound/soc-dai.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'include') diff --git a/include/sound/soc-dai.h b/include/sound/soc-dai.h index 776a60529e70..8b693dade9c6 100644 --- a/include/sound/soc-dai.h +++ b/include/sound/soc-dai.h @@ -471,7 +471,8 @@ static inline int snd_soc_dai_set_sdw_stream(struct snd_soc_dai *dai, * This routine only retrieves that was previously configured * with snd_soc_dai_get_sdw_stream() * - * Returns pointer to stream or -ENOTSUPP if callback is not supported; + * Returns pointer to stream or an ERR_PTR value, e.g. + * ERR_PTR(-ENOTSUPP) if callback is not supported; */ static inline void *snd_soc_dai_get_sdw_stream(struct snd_soc_dai *dai, int direction) -- cgit v1.2.3