From: Kai Vehmanen kai.vehmanen@linux.intel.com

[ Upstream commit 8e85def5723eccea30ebf22645673692ab8cb3e2 ]

This reverts commit 42ec336f1f9d ("ALSA: hda: Disable regmap internal locking").

Without regmap locking, there is a race between snd_hda_codec_amp_init() and PM callbacks issuing regcache_sync(). This was caught by following kernel warning trace:

<4> [358.080081] WARNING: CPU: 2 PID: 4157 at drivers/base/regmap/regcache.c:498 regcache_cache_only+0xf5/0x130 [...] <4> [358.080148] Call Trace: <4> [358.080158] snd_hda_codec_amp_init+0x4e/0x100 [snd_hda_codec] <4> [358.080169] snd_hda_codec_amp_init_stereo+0x40/0x80 [snd_hda_codec]

Suggested-by: Takashi Iwai tiwai@suse.de BugLink: https://gitlab.freedesktop.org/drm/intel/issues/592 Signed-off-by: Kai Vehmanen kai.vehmanen@linux.intel.com Link: https://lore.kernel.org/r/20200108180856.5194-1-kai.vehmanen@linux.intel.com Signed-off-by: Takashi Iwai tiwai@suse.de Signed-off-by: Sasha Levin sashal@kernel.org --- sound/hda/hdac_regmap.c | 1 - 1 file changed, 1 deletion(-)

diff --git a/sound/hda/hdac_regmap.c b/sound/hda/hdac_regmap.c index 2596a881186fa..49780399c2849 100644 --- a/sound/hda/hdac_regmap.c +++ b/sound/hda/hdac_regmap.c @@ -363,7 +363,6 @@ static const struct regmap_config hda_regmap_cfg = { .reg_write = hda_reg_write, .use_single_read = true, .use_single_write = true, - .disable_locking = true, };

/**