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| author | Jiri Slaby <jslaby@suse.cz> | 2012-03-05 14:52:50 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-03-08 12:51:13 -0800 |
| commit | e380a81e34375a38f253b42394ef06ca3127559f (patch) | |
| tree | ca03692116effe7affc1ce47f2ed43e3e48b64a4 /arch/parisc/kernel | |
| parent | 9b937421e852cfa9992d6e1a1d814dcec8eb1ce3 (diff) | |
| download | linux-stable-e380a81e34375a38f253b42394ef06ca3127559f.tar.gz linux-stable-e380a81e34375a38f253b42394ef06ca3127559f.tar.bz2 linux-stable-e380a81e34375a38f253b42394ef06ca3127559f.zip | |
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 <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/kernel')
| -rw-r--r-- | arch/parisc/kernel/pdc_cons.c | 4 |
1 files 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); } |