From b32425ac93370e1ba5556110e662f896b2e143b3 Mon Sep 17 00:00:00 2001 From: Takashi Iwai Date: Fri, 18 Nov 2005 18:52:14 +0100 Subject: [ALSA] Fix possible races in timer callbacks Fix possible races in timer callbacks. Signed-off-by: Takashi Iwai --- sound/drivers/mpu401/mpu401_uart.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) (limited to 'sound/drivers/mpu401') diff --git a/sound/drivers/mpu401/mpu401_uart.c b/sound/drivers/mpu401/mpu401_uart.c index ee67b522d259..8687ae3c66b8 100644 --- a/sound/drivers/mpu401/mpu401_uart.c +++ b/sound/drivers/mpu401/mpu401_uart.c @@ -133,12 +133,13 @@ irqreturn_t snd_mpu401_uart_interrupt(int irq, void *dev_id, struct pt_regs *reg static void snd_mpu401_uart_timer(unsigned long data) { struct snd_mpu401 *mpu = (struct snd_mpu401 *)data; + unsigned long flags; - spin_lock(&mpu->timer_lock); + spin_lock_irqsave(&mpu->timer_lock, flags); /*mpu->mode |= MPU401_MODE_TIMER;*/ mpu->timer.expires = 1 + jiffies; add_timer(&mpu->timer); - spin_unlock(&mpu->timer_lock); + spin_unlock_irqrestore(&mpu->timer_lock, flags); if (mpu->rmidi) _snd_mpu401_uart_interrupt(mpu); } -- cgit v1.2.3-59-g8ed1b