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TTY: pdc_cons, fix open vs timer race 

The timer is initialized too late. tty->open may fire an invalid
timer. So initialize the timer earlier using DEFINE_TIMER.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Kyle McMartin <kyle@mcmartin.ca>
Cc: Helge Deller <deller@gmx.de>
Cc: "James E.J. Bottomley" <jejb@parisc-linux.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jiri Slaby 2012-03-05 14:52:51 +01:00 committed by Greg Kroah-Hartman
parent e380a81e34
commit 52b762f7a9
1 changed files with 2 additions and 5 deletions
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7
arch/parisc/kernel/pdc_cons.c
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@ -90,7 +90,8 @@ static int pdc_console_setup(struct console *co, char *options)
#define PDC_CONS_POLL_DELAY (30 * HZ / 1000)
static struct timer_list pdc_console_timer;
static void pdc_console_poll(unsigned long unused);
static DEFINE_TIMER(pdc_console_timer, pdc_console_poll, 0, 0);
static int pdc_console_tty_open(struct tty_struct *tty, struct file *filp)
{
@ -205,10 +206,6 @@ static int __init pdc_console_tty_driver_init(void)
pdc_console_tty_driver = drv;
/* No need to initialize the pdc_console_timer if tty isn't allocated */
init_timer(&pdc_console_timer);
pdc_console_timer.function = pdc_console_poll;
return 0;
}