From 42ec336f1f9d54049811b749f729e9e01c152ade Mon Sep 17 00:00:00 2001
From: Takashi Iwai <tiwai@suse.de>
Date: Tue, 5 Nov 2019 09:18:06 +0100
Subject: [PATCH] ALSA: hda: Disable regmap internal locking
Git-commit: 42ec336f1f9d54049811b749f729e9e01c152ade
Patch-mainline: v5.5-rc1
References: jsc#SLE-16518

Since we apply the own mutex (bus->cmd_mutex) in HDA core side, the
internal locking in regmap is superfluous.  This patch adds the flag
to indicate that.

Also, an infamous side-effect by this change is that it disables the
regmap debugfs, too, and this is seen rather good; the regmap debugfs
isn't quite useful for HD-audio as it provides the very sparse
registers and its debugfs access tends to lead to the way too high
resource usages or sometimes hang up.  So it'd be rather safe to
disable it altogether.

Link: https://lore.kernel.org/r/2029139028.10333037.1572874551626.JavaMail.zimbra@redhat.com
Link: https://lore.kernel.org/r/20191105081806.4896-1-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>

---
 sound/hda/hdac_regmap.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/sound/hda/hdac_regmap.c b/sound/hda/hdac_regmap.c
index 286361ecd640..906b1e20bae0 100644
--- a/sound/hda/hdac_regmap.c
+++ b/sound/hda/hdac_regmap.c
@@ -363,6 +363,7 @@ static const struct regmap_config hda_regmap_cfg = {
 	.reg_write = hda_reg_write,
 	.use_single_read = true,
 	.use_single_write = true,
+	.disable_locking = true,
 };
 
 /**
-- 
2.16.4