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Commit 9dd81e31 authored by Clemens Ladisch's avatar Clemens Ladisch
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ALSA: dice: clear device lock when closing hwdep device 



Ensure that misbehaving or aborted userspace programs do not
accidentally keep the lock.

Signed-off-by: default avatarClemens Ladisch <clemens@ladisch.de>
parent 0c29c918

sound/firewire/dice.c

+13 −0
Original line number Diff line number Diff line
@@ -966,6 +966,18 @@ static int dice_hwdep_unlock(struct dice *dice) 
	return err;

}



static int dice_hwdep_release(struct snd_hwdep *hwdep, struct file *file)

{

	struct dice *dice = hwdep->private_data;



	spin_lock_irq(&dice->lock);

	if (dice->dev_lock_count == -1)

		dice->dev_lock_count = 0;

	spin_unlock_irq(&dice->lock);



	return 0;

}



static int dice_hwdep_ioctl(struct snd_hwdep *hwdep, struct file *file,

			    unsigned int cmd, unsigned long arg)

{
@@ -998,6 +1010,7 @@ static int dice_create_hwdep(struct dice *dice) 
{

	static const struct snd_hwdep_ops ops = {

		.read         = dice_hwdep_read,

		.release      = dice_hwdep_release,

		.poll         = dice_hwdep_poll,

		.ioctl        = dice_hwdep_ioctl,

		.ioctl_compat = dice_hwdep_compat_ioctl,