RPi 3: kernel >= 4.9.13 BUG: /sys/class/leds/led1/trigger

Raspberry Pi 2

RPi 3: kernel >= 4.9.13 BUG: /sys/class/leds/led1/trigger

Postby rfried » Sun Mar 05, 2017 9:47 pm

I'm using same SDcard image on RPi2 and RPi3.

Since upgradeing kernel 4.9.11 to 4.9.13 setting /sys/class/leds/led1/trigger to heartbeat
triggers crashes during boot process:

Code: Select all
[  OK  ] Mounted /boot.
[  OK  ] Reached target Local File Systems.
         Starting Create Volatile Files and Directories...
[  OK  ] Started Create Volatile Files and Directories.
         Starting Network Time Synchronization...
[   11.475306] BUG: scheduling while atomic: swapper/0/0/0x00000100
[   11.558799] Modules linked in:[   11.558882] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.9.13-3-ARCH #1
[   11.558885] Hardware name: BCM2835
[   11.558923] [<8010ead0>] (unwind_backtrace) from [<8010b65c>] (show_stack+0x10/0x14)
[   11.558941] [<8010b65c>] (show_stack) from [<80679b28>] (dump_stack+0x9c/0xc4)
[   11.558957] [<80679b28>] (dump_stack) from [<80151404>] (__schedule_bug+0x58/0x84)
[   11.558976] [<80151404>] (__schedule_bug) from [<809bf84c>] (__schedule+0x67c/0x88c)
[   11.558990] [<809bf84c>] (__schedule) from [<809bfaa4>] (schedule+0x48/0xa0)
[   11.559006] [<809bfaa4>] (schedule) from [<809c2c7c>] (schedule_timeout+0x230/0x388)
[   11.559020] [<809c2c7c>] (schedule_timeout) from [<809c0600>] (wait_for_common+0xb8/0x1a0)
[   11.559036] [<809c0600>] (wait_for_common) from [<8088655c>] (rpi_firmware_transaction+0x5c/0xbc)
[   11.559051] [<8088655c>] (rpi_firmware_transaction) from [<808866a0>] (rpi_firmware_property_list+0xe4/0x228)
[   11.559064] [<808866a0>] (rpi_firmware_property_list) from [<8088684c>] (rpi_firmware_property+0x68/0xa0)
[   11.559084] [<8088684c>] (rpi_firmware_property) from [<806b7228>] (brcmexp_gpio_set+0x40/0x80)
[   11.559099] [<806b7228>] (brcmexp_gpio_set) from [<808856f4>] (led_heartbeat_function+0x58/0x118)
[   11.559116] [<808856f4>] (led_heartbeat_function) from [<80190adc>] (call_timer_fn+0x30/0x188)
[   11.559129] [<80190adc>] (call_timer_fn) from [<80190d10>] (expire_timers+0xdc/0x164)
[   11.559141] [<80190d10>] (expire_timers) from [<80190e28>] (run_timer_softirq+0x90/0x1c8)
[   11.559159] [<80190e28>] (run_timer_softirq) from [<8012f810>] (__do_softirq+0xc0/0x2e8)
[   11.559174] [<8012f810>] (__do_softirq) from [<8012fd2c>] (irq_exit+0xc4/0x140)
[   11.559192] [<8012fd2c>] (irq_exit) from [<8017f834>] (__handle_domain_irq+0x58/0xb8)
[   11.559208] [<8017f834>] (__handle_domain_irq) from [<809c42b8>] (__irq_svc+0x58/0x74)
[   11.559225] [<809c42b8>] (__irq_svc) from [<80108330>] (arch_cpu_idle+0x30/0x3c)
[   11.559246] [<80108330>] (arch_cpu_idle) from [<8016fe98>] (cpu_startup_entry+0xd0/0x150)
[   11.559269] [<8016fe98>] (cpu_startup_entry) from [<80e00c80>] (start_kernel+0x378/0x408)
[   11.559303] ------------[ cut here ]------------
[   11.559313] WARNING: CPU: 0 PID: 0 at kernel/time/timer.c:1315 call_timer_fn+0x160/0x188
[   11.559322] timer: led_heartbeat_function+0x0/0x118 preempt leak: 00000100 -> 00000000
...


Untervoltage Sign appears when BUG is triggered.
System crashes or kernel spitting endless error messages and boot does never finish.

Power LED function settings are no really supported on RPi 3 but setting the function to heartbeat did
no harm in kernel 4.4 series. No issues when leaving default since 4.9.13.

kr roland
rfried
 
Posts: 1
Joined: Sun Mar 05, 2017 9:26 pm

Re: RPi 3: kernel >= 4.9.13 BUG: /sys/class/leds/led1/trigge

Postby vivait » Wed Mar 15, 2017 12:28 am

Hi,

I got the same problem but, in my case, I resolved that kernel panic disabling uart in config.txt

enable_uart=0

But I needed to turn on watchdog to "systemctl reboot" work nice. Without it, systemd just halt Raspberry Pi 3 ver. B

dtparam=watchdog=on

linux-raspberrypi 4.9.14-1
vivait
 
Posts: 1
Joined: Wed Mar 15, 2017 12:14 am


Return to Broadcom

Who is online

Users browsing this forum: No registered users and 2 guests