ARM: AM335x: Reboot broken in 3.11

ARM: AM335x: Reboot broken in 3.11

[Mark Jackson]

Rebooting appears to have broken in 3.11 (at some point before rc1).

Here is the console output:-

[    0.000000] Booting Linux on physical CPU 0x0
[    0.000000] Linux version 3.11.0-rc1-00006-gf550793 (mpfj@mpfj-nanobone) (gcc version 4.6.3 (Buildroot 2013.02-dirty) ) #328 Thu Aug 8 14:36:16 BST 2013
...
Welcome to Buildroot
nanobone login: root
Password:
# reboot
#
[   23.867076] UBIFS: background thread "ubifs_bgt0_0" stops
The system is going down NOW!
Sent SIGTERM to all processes
Sent SIGKILL to all processes
Requesting system reboot
[   25.924496] reboot: Restarting system

... and at this point the CPU seems to just freeze.

In 3v10, the board would reboot correctly back into uboot, etc.

I've also noticed that some of the output LEDs light up dim when the kernel
is booting on, and they come on full brightness at the reboot "freeze" point.
There are 4 LEDs affected and they are all connected to UART transmit pins.

Before I start bisecting, does anyone have any ideas ?

Cheers
Mark J.

Re: ARM: AM335x: Reboot broken in 3.11

[Lars Poeschel]

Am Donnerstag, 8. August 2013, 15:50:18 schrieb Mark Jackson:
> Rebooting appears to have broken in 3.11 (at some point before rc1).
> 
> Here is the console output:-
> 
> [    0.000000] Booting Linux on physical CPU 0x0
> [    0.000000] Linux version 3.11.0-rc1-00006-gf550793
> (mpfj@mpfj-nanobone) (gcc version 4.6.3 (Buildroot 2013.02-dirty) )
> #328 Thu Aug 8 14:36:16 BST 2013 ...
> Welcome to Buildroot
> nanobone login: root
> Password:
> # reboot
> #
> [   23.867076] UBIFS: background thread "ubifs_bgt0_0" stops
> The system is going down NOW!
> Sent SIGTERM to all processes
> Sent SIGKILL to all processes
> Requesting system reboot
> [   25.924496] reboot: Restarting system
> 
> ... and at this point the CPU seems to just freeze.
> 
> In 3v10, the board would reboot correctly back into uboot, etc.
> 
> I've also noticed that some of the output LEDs light up dim when the
> kernel is booting on, and they come on full brightness at the reboot
> "freeze" point. There are 4 LEDs affected and they are all connected to
> UART transmit pins.
> 
> Before I start bisecting, does anyone have any ideas ?

No problem here - at least not at -rc4:

Starting kernel ...

[    0.000000] Booting Linux on physical CPU 0x0
[    0.000000] Initializing cgroup subsys cpu
[    0.000000] Initializing cgroup subsys cpuacct
[    0.000000] Linux version 3.11.0-rc4-00019-g7c4368e-dirty (larsi@lem-
wkst-02) (gcc version 4.4.3 (GCC) ) #90 PREEMPT Thu Aug 8 16:42:06 CEST 
2013
[    0.000000] Machine: Generic AM33XX (Flattened Device Tree), ....
....
bboxv3 login: root
root@bboxv3:~# reboot

Broadcast message from root@bboxv3 (ttyO2) (鈬hu May 16 16:59:11 2013):

INIT: Sending processes the TERM signal
INIT: SenStopping OpenBSD Secure Shell server: sshdstopped /usr/sbin/sshd 
(pid 416)
.
Stopping system message bus: Stopping syslogd/klogd: stopped syslogd (pid 
423)
stopped klogd (pid 425)
done
Stopping tcf-agent: OK
Stopping internet superserver: xinetd.
not deconfiguring network interfaces: network file systems still mounted.
Stopping Linux NFC daemon
Stopping Lighttpd Web Server: stopped /usr/sbin/lighttpd (pid 440)
lighttpd.
Sending all processes the TERM signal...
Sending all processes the KILL signal...
Unmounting remote filesystems...
Deactivating swap...
Unmounting local filesystems...
Rebooting... [   38.285126] reboot: Restarting system

U-Boot SPL 2013.04-rc2-00063-gcd27ec7-dirty (May 21 2013 - 15:14:45)
OMAP SD/MMC: 0
reading u-boot.img
reading u-boot.img

Regards,
Lars