linux-kernel - [PATCH 2/4] ASoC: wm8962: Don't disable SYSCLK if it's enabled via DAPM

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-Id: <20260105-wm8962-l5-fixes-v1-2-8e047171da2d@puri.sm>
Date: Mon, 05 Jan 2026 03:51:55 +0100
From: Sebastian Krzyszkowiak <sebastian.krzyszkowiak@...i.sm>
To: Liam Girdwood <lgirdwood@...il.com>, Mark Brown <broonie@...nel.org>, 
 Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.com>
Cc: patches@...nsource.cirrus.com, linux-sound@...r.kernel.org, 
 linux-kernel@...r.kernel.org, kernel@...i.sm, 
 Sebastian Krzyszkowiak <sebastian.krzyszkowiak@...i.sm>
Subject: [PATCH 2/4] ASoC: wm8962: Don't disable SYSCLK if it's enabled via
 DAPM

If SYSCLK pin is enabled via DAPM, wm8962_configure_bclk may turn it off
behind DAPM's back, making it assume that the clock is still enabled even
if it actually isn't, which can end up with it not being enabled for
playback or capture when it's needed.

Signed-off-by: Sebastian Krzyszkowiak <sebastian.krzyszkowiak@...i.sm>
---
 sound/soc/codecs/wm8962.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/sound/soc/codecs/wm8962.c b/sound/soc/codecs/wm8962.c
index 1040740fc80f..843b8c6b40a4 100644
--- a/sound/soc/codecs/wm8962.c
+++ b/sound/soc/codecs/wm8962.c
@@ -2520,7 +2520,8 @@ static void wm8962_configure_bclk(struct snd_soc_component *component)
 	usleep_range(500, 1000);
 	dspclk = snd_soc_component_read(component, WM8962_CLOCKING1);
 
-	if (snd_soc_dapm_get_bias_level(dapm) != SND_SOC_BIAS_ON)
+	if (snd_soc_dapm_get_bias_level(dapm) != SND_SOC_BIAS_ON
+	    && !snd_soc_dapm_get_pin_status(dapm, "SYSCLK"))
 		snd_soc_component_update_bits(component, WM8962_CLOCKING2,
 				WM8962_SYSCLK_ENA_MASK, 0);
 

-- 
2.52.0