diff options
| author | Jean Delvare <khali@linux-fr.org> | 2009-03-07 07:43:01 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2009-03-30 12:43:17 -0300 |
| commit | f263bac9f7181df80b732b7bc11a7a4e38ca962f (patch) | |
| tree | 8f764ca109e26828f05acbcb49ce3c9f19f6c2dc /drivers | |
| parent | c61402bae843f1f7ec29a6fe81681be21c3d201c (diff) | |
V4L/DVB (10938): em28xx: Prevent general protection fault on rmmod
The removal of the timer which polls the infrared input is racy.
Replacing the timer with a delayed work solves the problem.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/media/video/em28xx/em28xx-input.c | 22 |
1 files changed, 6 insertions, 16 deletions
diff --git a/drivers/media/video/em28xx/em28xx-input.c b/drivers/media/video/em28xx/em28xx-input.c index 0443afe09ff..a5abfd7a19f 100644 --- a/drivers/media/video/em28xx/em28xx-input.c +++ b/drivers/media/video/em28xx/em28xx-input.c @@ -68,8 +68,7 @@ struct em28xx_IR { /* poll external decoder */ int polling; - struct work_struct work; - struct timer_list timer; + struct delayed_work work; unsigned int last_toggle:1; unsigned int last_readcount; unsigned int repeat_interval; @@ -292,32 +291,23 @@ static void em28xx_ir_handle_key(struct em28xx_IR *ir) return; } -static void ir_timer(unsigned long data) -{ - struct em28xx_IR *ir = (struct em28xx_IR *)data; - - schedule_work(&ir->work); -} - static void em28xx_ir_work(struct work_struct *work) { - struct em28xx_IR *ir = container_of(work, struct em28xx_IR, work); + struct em28xx_IR *ir = container_of(work, struct em28xx_IR, work.work); em28xx_ir_handle_key(ir); - mod_timer(&ir->timer, jiffies + msecs_to_jiffies(ir->polling)); + schedule_delayed_work(&ir->work, msecs_to_jiffies(ir->polling)); } static void em28xx_ir_start(struct em28xx_IR *ir) { - setup_timer(&ir->timer, ir_timer, (unsigned long)ir); - INIT_WORK(&ir->work, em28xx_ir_work); - schedule_work(&ir->work); + INIT_DELAYED_WORK(&ir->work, em28xx_ir_work); + schedule_delayed_work(&ir->work, 0); } static void em28xx_ir_stop(struct em28xx_IR *ir) { - del_timer_sync(&ir->timer); - flush_scheduled_work(); + cancel_delayed_work_sync(&ir->work); } int em28xx_ir_init(struct em28xx *dev) |