ALSA: drivers: Convert timers to use timer_setup()

In preparation for unconditionally passing the struct timer_list pointer to
all timer callbacks, switch to using the new timer_setup() and from_timer()
to pass the timer pointer explicitly.

Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/drivers/mtpav.c

@@ -406,10 +406,10 @@ static void snd_mtpav_input_trigger(struct snd_rawmidi_substream *substream, int
  * timer interrupt for outputs
  */
 
-static void snd_mtpav_output_timer(unsigned long data)
+static void snd_mtpav_output_timer(struct timer_list *t)
 {
 	unsigned long flags;
-	struct mtpav *chip = (struct mtpav *)data;
+	struct mtpav *chip = from_timer(chip, t, timer);
 	int p;
 
 	spin_lock_irqsave(&chip->spinlock, flags);
@@ -707,8 +707,7 @@ static int snd_mtpav_probe(struct platform_device *dev)
 	mtp_card->share_irq = 0;
 	mtp_card->inmidistate = 0;
 	mtp_card->outmidihwport = 0xffffffff;
-	setup_timer(&mtp_card->timer, snd_mtpav_output_timer,
-		    (unsigned long) mtp_card);
+	timer_setup(&mtp_card->timer, snd_mtpav_output_timer, 0);
 
 	card->private_free = snd_mtpav_free;