From e380a81e34375a38f253b42394ef06ca3127559f Mon Sep 17 00:00:00 2001 From: Jiri Slaby Date: Mon, 5 Mar 2012 14:52:50 +0100 Subject: [PATCH] TTY: pdc_cons, fix racy tty test The tty->count test in the timer was racy. Let's remove the test and properly delete the timer and wait for the body to finish using _sync version of del_timer. Signed-off-by: Jiri Slaby Cc: Kyle McMartin Cc: Helge Deller Cc: "James E.J. Bottomley" Signed-off-by: Greg Kroah-Hartman --- arch/parisc/kernel/pdc_cons.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/parisc/kernel/pdc_cons.c b/arch/parisc/kernel/pdc_cons.c index fc770be465ff..c1db65fc4525 100644 --- a/arch/parisc/kernel/pdc_cons.c +++ b/arch/parisc/kernel/pdc_cons.c @@ -103,7 +103,7 @@ static int pdc_console_tty_open(struct tty_struct *tty, struct file *filp) static void pdc_console_tty_close(struct tty_struct *tty, struct file *filp) { if (!tty->count) - del_timer(&pdc_console_timer); + del_timer_sync(&pdc_console_timer); } static int pdc_console_tty_write(struct tty_struct *tty, const unsigned char *buf, int count) @@ -153,7 +153,7 @@ static void pdc_console_poll(unsigned long unused) if (count) tty_flip_buffer_push(tty); - if (tty->count && (pdc_cons.flags & CON_ENABLED)) + if (pdc_cons.flags & CON_ENABLED) mod_timer(&pdc_console_timer, jiffies + PDC_CONS_POLL_DELAY); } -- 2.20.1