linux-kernel - WARNING: CPU: 3 PID: 1 at __flush

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Date:   Thu, 12 Dec 2019 00:09:21 +0100
From:   Vicente Bergas <vicencb@...il.com>
To:     Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>, Heiko Stuebner <heiko@...ech.de>
Cc:     <alsa-devel@...a-project.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-rockchip@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>
Subject: WARNING: CPU: 3 PID: 1 at __flush_work.isra.47+0x22c/0x248

Hi,
since v5.5-rc1 four equal consecutive traces appeared that seem related to
rockchip sound. As i wasn't sure to whom sent the report just added
everybody from
./scripts/get_maintainer.pl sound/soc/rockchip/rk3399_gru_sound.c
which is the file containg one of the functions in the trace.

By the way, sound works fine. After all traces, there is this message that
could also be related:
[    0.625354] da7219 8-001a: Using default DAI clk names: da7219-dai-wclk, 
da7219-dai-bclk

Regards,
  Vicente.

[    0.607955] ------------[ cut here ]------------
[    0.607967] WARNING: CPU: 3 PID: 1 at __flush_work.isra.47+0x22c/0x248
[    0.607972] CPU: 3 PID: 1 Comm: swapper/0 Not tainted 5.5.0-rc1 #1
[    0.607973] Hardware name: Google Kevin (DT)
[    0.607977] pstate: 00000005 (nzcv daif -PAN -UAO)
[    0.607980] pc : __flush_work.isra.47+0x22c/0x248
[    0.607982] lr : flush_delayed_work+0x34/0x58
[    0.607984] sp : ffff80001004b950
[    0.607985] x29: ffff80001004b950 x28: ffff8000109f47c8 
[    0.607989] x27: ffff800010b29890 x26: ffff800010acfdf0 
[    0.607992] x25: 0000000000000003 x24: 0000000000000001 
[    0.607994] x23: ffff0000f2779f00 x22: ffff800010c974f0 
[    0.607997] x21: 0000000000000000 x20: ffff800010c7ca48 
[    0.608000] x19: ffff0000f277f698 x18: 0000000000000014 
[    0.608003] x17: 000000007dad679e x16: 00000000be8a3c7e 
[    0.608006] x15: 0000000072509968 x14: 0000000000000000 
[    0.608008] x13: 0000000000000000 x12: 0000000000000000 
[    0.608011] x11: 0000000000000008 x10: 0101010101010101 
[    0.608014] x9 : 0000000000000000 x8 : 7f7f7f7f7f7f7f7f 
[    0.608017] x7 : ffff0000f3975800 x6 : 0080808080808080 
[    0.608019] x5 : dead000000000100 x4 : dead000000000122 
[    0.608022] x3 : 0000000000000000 x2 : 0000000000000000 
[    0.608025] x1 : 0000000000000000 x0 : ffff0000f277f698 
[    0.608028] Call trace:
[    0.608031]  __flush_work.isra.47+0x22c/0x248
[    0.608034]  flush_delayed_work+0x34/0x58
[    0.608040]  soc_free_pcm_runtime.part.19+0x40/0x60
[    0.608043]  snd_soc_remove_dai_link+0x54/0x60
[    0.608047]  soc_cleanup_card_resources+0x160/0x298
[    0.608050]  snd_soc_bind_card+0x248/0x978
[    0.608053]  snd_soc_register_card+0xf0/0x108
[    0.608057]  devm_snd_soc_register_card+0x40/0x90
[    0.608061]  rockchip_sound_probe+0x210/0x2e8
[    0.608066]  platform_drv_probe+0x50/0xa0
[    0.608070]  really_probe+0xd8/0x2f0
[    0.608073]  driver_probe_device+0x54/0xe8
[    0.608075]  device_driver_attach+0x6c/0x78
[    0.608078]  __driver_attach+0x68/0xe8
[    0.608082]  bus_for_each_dev+0x60/0x98
[    0.608085]  driver_attach+0x20/0x28
[    0.608088]  bus_add_driver+0x170/0x1d0
[    0.608091]  driver_register+0x60/0x110
[    0.608093]  __platform_driver_register+0x44/0x50
[    0.608098]  rockchip_sound_driver_init+0x18/0x20
[    0.608102]  do_one_initcall+0x70/0x148
[    0.608105]  kernel_init_freeable+0x1b4/0x254
[    0.608109]  kernel_init+0x10/0xfc
[    0.608113]  ret_from_fork+0x10/0x18
[    0.608117] ---[ end trace fc1c70d7fb870a47 ]---