[ALSA] sound/core/control.c: hard-irq-safe -> hard-irq-unsafe lock warning
The lock grabbed in snd_ctl_empty_read_queue() is hardirq-unsafe but we hold
an hardirq-safe one already, so make the &ctl->read_lock also hard-irq-safe.
Signed-off-by: Borislav Petkov <bbpetkov@yahoo.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
diff --git a/sound/core/control.c b/sound/core/control.c
index 4c3aa8e..df0774c 100644
--- a/sound/core/control.c
+++ b/sound/core/control.c
@@ -93,15 +93,16 @@
static void snd_ctl_empty_read_queue(struct snd_ctl_file * ctl)
{
+ unsigned long flags;
struct snd_kctl_event *cread;
- spin_lock(&ctl->read_lock);
+ spin_lock_irqsave(&ctl->read_lock, flags);
while (!list_empty(&ctl->events)) {
cread = snd_kctl_event(ctl->events.next);
list_del(&cread->list);
kfree(cread);
}
- spin_unlock(&ctl->read_lock);
+ spin_unlock_irqrestore(&ctl->read_lock, flags);
}
static int snd_ctl_release(struct inode *inode, struct file *file)