--- Begin Message ---
- To: <broonie@xxxxxxxxxx>
- Subject: [PATCH 3/6] ASoC: cs35l56: Skip first init_completion wait in dsp_work if init_done
- From: Richard Fitzgerald <rf@xxxxxxxxxxxxxxxxxxxxx>
- Date: Tue, 11 Apr 2023 16:25:25 +0100
- Cc: alsa-devel@xxxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, patches@xxxxxxxxxxxxxxxxxxxxx, Richard Fitzgerald <rf@xxxxxxxxxxxxxxxxxxxxx>
- In-reply-to: <20230411152528.329803-1-rf@opensource.cirrus.com>
- References: <20230411152528.329803-1-rf@opensource.cirrus.com>
At the start of dsp_work() only wait for init_completion if !init_done. This allows system suspend to re-queue dsp_work() without having to do a dummy complete() of init_completion. A dummy completion in system suspend would have to be conditional on init_done. But that would create a possible race condition between our system resume and cs35l56_init() in the corner case that we suspend right after the SoundWire core has enumerated and reported ATTACHED. It is safer and simpler to have cs35l56_init() as the only place that init_completion is completed, and dsp_work() as the only place that it is consumed. Signed-off-by: Richard Fitzgerald <rf@xxxxxxxxxxxxxxxxxxxxx> --- sound/soc/codecs/cs35l56.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/sound/soc/codecs/cs35l56.c b/sound/soc/codecs/cs35l56.c index 997a5c5acaab..62c44276c121 100644 --- a/sound/soc/codecs/cs35l56.c +++ b/sound/soc/codecs/cs35l56.c @@ -866,7 +866,8 @@ static void cs35l56_dsp_work(struct work_struct *work) unsigned int val; int ret = 0; - if (!wait_for_completion_timeout(&cs35l56->init_completion, + if (!cs35l56->init_done && + !wait_for_completion_timeout(&cs35l56->init_completion, msecs_to_jiffies(5000))) { dev_err(cs35l56->dev, "%s: init_completion timed out\n", __func__); goto complete; -- 2.30.2
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