From 5dc7d5bc9627eb26d33c7c7eefc467cf217f9326 Mon Sep 17 00:00:00 2001 From: Kai Vehmanen Date: Fri, 1 Nov 2019 12:06:35 -0500 Subject: [PATCH] ASoC: hdac_hda: fix race in device removal When ASoC card instance is removed containing a HDA codec, hdac_hda_codec_remove() may run in parallel with codec resume. This will cause problems if the HDA link is freed with snd_hdac_ext_bus_link_put() while the codec is still in middle of its resume process. To fix this, change the order such that pm_runtime_disable() is called before the link is freed. This will ensure any pending runtime PM action is completed before proceeding to free the link. This issue can be easily hit with e.g. SOF driver by loading and unloading the drivers. Signed-off-by: Kai Vehmanen Signed-off-by: Pierre-Louis Bossart Link: https://lore.kernel.org/r/20191101170635.26389-1-pierre-louis.bossart@linux.intel.com Signed-off-by: Mark Brown --- sound/soc/codecs/hdac_hda.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/sound/soc/codecs/hdac_hda.c b/sound/soc/codecs/hdac_hda.c index 91242b6..4570f66 100644 --- a/sound/soc/codecs/hdac_hda.c +++ b/sound/soc/codecs/hdac_hda.c @@ -410,8 +410,8 @@ static void hdac_hda_codec_remove(struct snd_soc_component *component) return; } - snd_hdac_ext_bus_link_put(hdev->bus, hlink); pm_runtime_disable(&hdev->dev); + snd_hdac_ext_bus_link_put(hdev->bus, hlink); } static const struct snd_soc_dapm_route hdac_hda_dapm_routes[] = { -- 2.7.4