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@opensource.cirrus.com --- 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;