original_kernel/drivers/parport
Michael Buesch f59abb161c parport: ieee1284: use del_timer_sync() in parport_wait_event()
Use del_timer_sync() instead of del_timer() to make sure the timer won't
be running when we return from parport_wait_event(), because this would
crash due to destruction of timer_list.

This is untested and just based on a code review.  Just think about the
following sequence of events:

- add_timer()

- down_interruptible() is interrupted by a signal.

- we enter the timer callback handler on another CPU.

- del_timer(), but the timer callback is still running.

- eturn from parport_wait_even, which destroys the automatic variable
  "timer" while the callback is running on another CPU.

[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Michael Buesch <mb@bu3sch.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-01-06 15:59:31 -08:00
..
BUGS-parport
ChangeLog
Kconfig
Makefile
TODO-parport
daisy.c
ieee1284.c parport: ieee1284: use del_timer_sync() in parport_wait_event() 2009-01-06 15:59:31 -08:00
ieee1284_ops.c
multiface.h
parport_amiga.c
parport_atari.c
parport_ax88796.c
parport_cs.c
parport_gsc.c
parport_gsc.h
parport_ip32.c
parport_mfc3.c
parport_pc.c
parport_serial.c
parport_sunbpp.c
probe.c
procfs.c
share.c