Am 29.11.2015 um 19:22 schrieb Peter Hurley:

quoted

quoted

[  413.536749] WARNING: CPU: 6 PID: 25400 at lib/debugobjects.c:263 debug_print_object+0x1c4/0x1e0()
[  413.538111] ODEBUG: free active (active state 0) object type: timer_list hint: delayed_work_timer_fn+0x0/0x90

This message seems to indicate that an object of type timer_list was
freed which was still active. However the driver in question
(ser_gigaset) does not use any timers.

[...]

quoted

Judging from the backtrace below this must be the call

        kfree(cs->hw.ser);

in drivers/isdn/gigaset/ser-gigaset.c line 375.
cs->hw.ser is of type struct ser_cardstate *.
struct ser_cardstate consists of a struct platform_device, a struct
completion, an atomic_t and a pointer. No timer_list.

[...]

The platform_device embedded in struct ser_cardstate hasn't been released when
you kfree() the memory it's in.

Btw I don't see a timer_list object in struct platform_device either.
Nor in the embedded struct device.

-- 
Tilman Schmidt                              E-Mail: tilman@imap.cc
Bonn, Germany
Nous, on a des fleurs et des bougies pour nous protéger.