Commit 2458adb8f92a ("SoC: simple-card-utils: set 0Hz to sysclk when shutdown") added a call to snd_soc_dai_set_sysclk() with 0 Hz frequency. Being propagated further it causes a division by zero in clk-ep93xx driver:
Division by zero in kernel. CPU: 0 PID: 52 Comm: aplay Tainted: G W 6.2.0-rc4-... #1 Hardware name: Generic DT based system unwind_backtrace from show_stack+0x10/0x18 show_stack from dump_stack_lvl+0x28/0x34 dump_stack_lvl from __div0+0x10/0x1c __div0 from Ldiv0+0x8/0x1c Ldiv0 from ep93xx_mux_determine_rate+0x78/0x1d0 ep93xx_mux_determine_rate from clk_core_round_rate_nolock+0x48/0xc8 clk_core_round_rate_nolock from clk_core_set_rate_nolock+0x48/0x160 clk_core_set_rate_nolock from clk_set_rate+0x30/0x8c clk_set_rate from ep93xx_i2s_set_sysclk+0x30/0x6c ep93xx_i2s_set_sysclk from snd_soc_dai_set_sysclk+0x3c/0xa4 snd_soc_dai_set_sysclk from asoc_simple_shutdown+0xb8/0x164 asoc_simple_shutdown from snd_soc_link_shutdown+0x44/0x54 snd_soc_link_shutdown from soc_pcm_clean+0x78/0x180 soc_pcm_clean from soc_pcm_close+0x28/0x40 soc_pcm_close from snd_pcm_release_substream.part.0+0x3c/0x84 snd_pcm_release_substream.part.0 from snd_pcm_release+0x40/0x88 snd_pcm_release from __fput+0x74/0x278
There has been commit f1879d7b98dc ("ASoC: rockchip: ignore 0Hz sysclk"), but it prepared by far not all drivers.
Signed-off-by: Alexander Sverdlin alexander.sverdlin@gmail.com --- sound/soc/cirrus/ep93xx-i2s.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/sound/soc/cirrus/ep93xx-i2s.c b/sound/soc/cirrus/ep93xx-i2s.c index 982151330c89..f41712df7994 100644 --- a/sound/soc/cirrus/ep93xx-i2s.c +++ b/sound/soc/cirrus/ep93xx-i2s.c @@ -359,6 +359,8 @@ static int ep93xx_i2s_set_sysclk(struct snd_soc_dai *cpu_dai, int clk_id,
if (dir == SND_SOC_CLOCK_IN || clk_id != 0) return -EINVAL; + if (!freq) + return 0;
return clk_set_rate(info->mclk, freq); }