diff options
| -rw-r--r-- | sound/drivers/mpu401/mpu401_uart.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/sound/drivers/mpu401/mpu401_uart.c b/sound/drivers/mpu401/mpu401_uart.c index 3306ecd49243..b57f2d5a1c9d 100644 --- a/sound/drivers/mpu401/mpu401_uart.c +++ b/sound/drivers/mpu401/mpu401_uart.c @@ -97,23 +97,27 @@ static void snd_mpu401_uart_clear_rx(struct snd_mpu401 *mpu) static void uart_interrupt_tx(struct snd_mpu401 *mpu) { + unsigned long flags; + if (test_bit(MPU401_MODE_BIT_OUTPUT, &mpu->mode) && test_bit(MPU401_MODE_BIT_OUTPUT_TRIGGER, &mpu->mode)) { - spin_lock(&mpu->output_lock); + spin_lock_irqsave(&mpu->output_lock, flags); snd_mpu401_uart_output_write(mpu); - spin_unlock(&mpu->output_lock); + spin_unlock_irqrestore(&mpu->output_lock, flags); } } static void _snd_mpu401_uart_interrupt(struct snd_mpu401 *mpu) { + unsigned long flags; + if (mpu->info_flags & MPU401_INFO_INPUT) { - spin_lock(&mpu->input_lock); + spin_lock_irqsave(&mpu->input_lock, flags); if (test_bit(MPU401_MODE_BIT_INPUT, &mpu->mode)) snd_mpu401_uart_input_read(mpu); else snd_mpu401_uart_clear_rx(mpu); - spin_unlock(&mpu->input_lock); + spin_unlock_irqrestore(&mpu->input_lock, flags); } if (! (mpu->info_flags & MPU401_INFO_TX_IRQ)) /* ok. for better Tx performance try do some output |