From: Borislav Petkov Date: Mon, 22 Oct 2007 15:11:09 +0000 (+0200) Subject: [ALSA] sound/core/control.c: hard-irq-safe -> hard-irq-unsafe lock warning X-Git-Tag: firefly_0821_release~24651^2~2 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=7507e8da2f21476007501f04d8bce2b7d0cb3971;p=firefly-linux-kernel-4.4.55.git [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 Signed-off-by: Takashi Iwai Signed-off-by: Jaroslav Kysela --- diff --git a/sound/core/control.c b/sound/core/control.c index 4c3aa8e10378..df0774c76f6f 100644 --- a/sound/core/control.c +++ b/sound/core/control.c @@ -93,15 +93,16 @@ static int snd_ctl_open(struct inode *inode, struct file *file) 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)