With the attached config, Salvator-X(S) (H3 ES1/2 and M3-W) hang during boot.
This does not happen with renesas-defconfig.
============================================
WARNING: possible recursive locking detected
4.15.0-rc3-salvator-x #1515 Not tainted
--------------------------------------------
kworker/2:1/58 is trying to acquire lock:
((wq_completion)"events"){+.+.}, at: [<00000000d5acd491>]
wait_for_completion+0x14/0x1c
but task is already holding lock:
((wq_completion)"events"){+.+.}, at: [<00000000b4b1d69e>]
process_one_work+0x1a8/0x648
other info that might help us debug this:
Possible unsafe locking scenario:
CPU0
----
lock((wq_completion)"events");
lock((wq_completion)"events");
*** DEADLOCK ***
May be due to missing lock nesting notation
3 locks held by kworker/2:1/58:
#0: ((wq_completion)"events"){+.+.}, at: [<00000000b4b1d69e>]
process_one_work+0x1a8/0x648
#1: (deferred_probe_work){+.+.}, at: [<00000000b4b1d69e>]
process_one_work+0x1a8/0x648
#2: (&dev->mutex){....}, at: [<0000000078a5bb8f>] __device_attach+0x28/0xf8
stack backtrace:
CPU: 2 PID: 58 Comm: kworker/2:1 Not tainted 4.15.0-rc3-salvator-x #1515
Hardware name: Renesas Salvator-X 2nd version board based on r8a7795 ES2.0+ (DT)
Workqueue: events deferred_probe_work_func
Call trace:
dump_backtrace+0x0/0x118
show_stack+0x14/0x1c
dump_stack+0xb4/0xf0
__lock_acquire+0xfe0/0x1208
lock_acquire+0x19c/0x24c
wait_for_common+0x68/0x1f0
wait_for_completion+0x14/0x1c
flush_workqueue+0x19c/0x3c4
drm_mode_config_cleanup+0x84/0x22c
rcar_du_remove+0x38/0x50
rcar_du_probe+0x114/0x12c
platform_drv_probe+0x58/0xa4
driver_probe_device+0x178/0x2f8
__device_attach_driver+0xa0/0xb0
bus_for_each_drv+0x74/0x90
__device_attach+0x90/0xf8
device_initial_probe+0x10/0x18
bus_probe_device+0x2c/0x90
deferred_probe_work_func+0x108/0x13c
process_one_work+0x328/0x648
process_scheduled_works+0x30/0x40
worker_thread+0x260/0x350
kthread+0x158/0x160
ret_from_fork+0x10/0x18
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
Attachment:
salvator-config.gz
Description: GNU Zip compressed data
