From: Bard Liao <yung-chuan.liao@linux.intel.com>
To: alsa-devel@alsa-project.org, vkoul@kernel.org
Cc: vinod.koul@linaro.org, linux-kernel@vger.kernel.org,
tiwai@suse.de, broonie@kernel.org, gregkh@linuxfoundation.org,
jank@cadence.com, srinivas.kandagatla@linaro.org,
rander.wang@linux.intel.com, ranjani.sridharan@linux.intel.com,
hui.wang@canonical.com, pierre-louis.bossart@linux.intel.com,
sanyog.r.kale@intel.com, mengdong.lin@intel.com,
bard.liao@intel.com
Subject: [PATCH v2 1/3] ASoC: soc-dai: clarify return value for get_sdw_stream()
Date: Fri, 4 Sep 2020 04:46:48 +0800 [thread overview]
Message-ID: <20200903204650.31098-2-yung-chuan.liao@linux.intel.com> (raw)
In-Reply-To: <20200903204650.31098-1-yung-chuan.liao@linux.intel.com>
From: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
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 <srinivas.kandagatla@linaro.org>
Reported-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Rander Wang <rander.wang@linux.intel.com>
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
---
include/sound/soc-dai.h | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
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)
--
2.17.1
next prev parent reply other threads:[~2020-09-04 8:40 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-03 20:46 [PATCH v2 0/3] ASoC: Add sdw stream operations to dailink ops Bard Liao
2020-09-03 20:46 ` Bard Liao [this message]
2020-09-03 20:46 ` [PATCH v2 2/3] ASOC: Intel: sof_sdw: add dailink .trigger callback Bard Liao
2020-09-03 20:46 ` [PATCH v2 3/3] ASOC: Intel: sof_sdw: add dailink .prepare and .hw_free callback Bard Liao
2020-09-04 9:19 ` [PATCH v2 0/3] ASoC: Add sdw stream operations to dailink ops Vinod Koul
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