linux-kernel - [PATCH 2/2] Revert "ASoC: meson: axg-card: make links nonatomic"

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Message-Id: <20220421155725.2589089-2-narmstrong@baylibre.com>
Date:   Thu, 21 Apr 2022 17:57:25 +0200
From:   Neil Armstrong <narmstrong@...libre.com>
To:     jbrunet@...libre.com, broonie@...nel.org
Cc:     alsa-devel@...a-project.org, linux-arm-kernel@...ts.infradead.org,
        linux-amlogic@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Neil Armstrong <narmstrong@...libre.com>,
        Dmitry Shmidt <dimitrysh@...gle.com>
Subject: [PATCH 2/2] Revert "ASoC: meson: axg-card: make links nonatomic"

This commit e138233e56e9829e65b6293887063a1a3ccb2d68 causes the
following system crash when using audio on G12A/G12B & SM1 systems:
 BUG: sleeping function called from invalid context at kernel/locking/mutex.c:282
  in_atomic(): 1, irqs_disabled(): 128, non_block: 0, pid: 0, name: swapper/0
 preempt_count: 10001, expected: 0
 RCU nest depth: 0, expected: 0
 Preemption disabled at:
 schedule_preempt_disabled+0x20/0x2c
 CPU: 0 PID: 0 Comm: swapper/0 Tainted: G        W         5.17.0-rc6-03747-gd403c3588f77-dirty #957
 Hardware name: SEI Robotics SEI610 (DT)
 Call trace:
 dump_backtrace+0xd8/0xf4
 show_stack+0x18/0x30
 dump_stack_lvl+0x70/0x8c
 dump_stack+0x18/0x38
 __might_resched+0x154/0x164
 __might_sleep+0x48/0x78
 mutex_lock+0x24/0x60
 _snd_pcm_stream_lock_irqsave+0x20/0x3c
 snd_pcm_period_elapsed+0x24/0xa4
 axg_fifo_pcm_irq_block+0x64/0xdc
 __handle_irq_event_percpu+0x104/0x264
 handle_irq_event+0x48/0xb4
 ...
 start_kernel+0x3f0/0x484
 __primary_switched+0xc0/0xc8

Revert this commit until the crash is fixed.

Reported-by: Dmitry Shmidt <dimitrysh@...gle.com>
Signed-off-by: Neil Armstrong <narmstrong@...libre.com>
---
 sound/soc/meson/axg-card.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/sound/soc/meson/axg-card.c b/sound/soc/meson/axg-card.c
index cbbaa55d92a6..2b77010c2c5c 100644
--- a/sound/soc/meson/axg-card.c
+++ b/sound/soc/meson/axg-card.c
@@ -320,7 +320,6 @@ static int axg_card_add_link(struct snd_soc_card *card, struct device_node *np,

 	dai_link->cpus = cpu;
 	dai_link->num_cpus = 1;
-	dai_link->nonatomic = true;

 	ret = meson_card_parse_dai(card, np, &dai_link->cpus->of_node,
 				   &dai_link->cpus->dai_name);
-- 
2.25.1