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authorJiri Slaby <jslaby@suse.cz>2012-03-05 14:52:51 +0100
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2012-03-08 12:51:13 -0800
commit52b762f7a94c88e5a8aa2be67a06a6f01020cc82 (patch)
tree637b42adc531c7cfd1e5b3c374fa19b84e5864ba /arch/parisc
parente380a81e34375a38f253b42394ef06ca3127559f (diff)
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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>
Diffstat (limited to 'arch/parisc')
-rw-r--r--arch/parisc/kernel/pdc_cons.c7
1 files changed, 2 insertions, 5 deletions
diff --git a/arch/parisc/kernel/pdc_cons.c b/arch/parisc/kernel/pdc_cons.c
index c1db65fc4525..8ad05215d4b1 100644
--- a/arch/parisc/kernel/pdc_cons.c
+++ b/arch/parisc/kernel/pdc_cons.c
@@ -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;
}