Fireface 800 lockup with pipewire

Hello Sakamoto-San, I want to report an issue:

On my system with LSI FW643 and RME FireFace 800, sometimes the pipewire process gets locked into uninterruptible sleep (D state).

This occurs under two circumstances:

pipewire has an auto-suspend feature that closes the connection to the audio device after 5 seconds of silence. This I could disable.

after suspend (to RAM). this I need to work reliably.

sudo cat /proc/2236/stack
[<0>] fw_run_transaction+0x225/0x3b0 [firewire_core]
[<0>] snd_fw_transaction+0xae/0x130 [snd_firewire_lib]
[<0>] ff800_finish_session+0x3f/0x60 [snd_fireface]
[<0>] snd_ff_stream_stop_duplex+0x35/0x70 [snd_fireface]
[<0>] pcm_hw_free+0x38/0x50 [snd_fireface]
[<0>] snd_pcm_common_ioctl+0x1203/0x1790 [snd_pcm]
[<0>] snd_pcm_ioctl+0x2a/0x40 [snd_pcm]
[<0>] __x64_sys_ioctl+0x90/0xd0
[<0>] do_syscall_64+0x38/0xc0
[<0>] entry_SYSCALL_64_after_hwframe+0x6e/0xd8

sudo cat /proc/2236/syscall
16 0x6c 0x4112 0x5 0x5610a86e3e90 0x5610a86e3 0x7 0x7ffe4d126ca0 0x7f7a5e2ec3af

in trying to sudo rmmod -f snd_fireface spawns an rmmod process which then goes into uninterruptible sleep (D state) itself.

while true; do kill -9 2236; done runs forever.

sudo strace -f -o pipewire_strace -p 2236 returns strace: attach: ptrace(PTRACE_SEIZE, 2236): operation forbidden

That's as far as I got searching with ddg.

All I can do to get audio back is reboot, but even then on shutdown, the kernel waits minutes for the process to terminate.

Can you please help me with this? I'll be glad to provide any information you require.

takaswie / linux-firewire-dkms

Fireface 800 lockup with pipewire #55