From 031bea594f6570c6df6f8d169a035b25584c666a Mon Sep 17 00:00:00 2001 From: Keyon Jie Date: Sat, 2 Nov 2019 01:13:59 +0800 Subject: [PATCH] ASoC: SOF: PM: add check before setting d0_substate Add check before seeting d0_substate and return success if Audio DSP is already in the target substate. Signed-off-by: Keyon Jie --- sound/soc/sof/pm.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/sound/soc/sof/pm.c b/sound/soc/sof/pm.c index 560a937e0484..717251432ee9 100644 --- a/sound/soc/sof/pm.c +++ b/sound/soc/sof/pm.c @@ -416,6 +416,9 @@ int snd_sof_set_d0_substate(struct snd_sof_dev *sdev, { int ret; + if (sdev->d0_substate == d0_substate) + return 0; + /* do platform specific set_state */ ret = snd_sof_dsp_set_power_state(sdev, d0_substate); if (ret < 0)