ide: 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.

Cc: "David S. Miller" <davem@davemloft.net>
Cc: linux-ide@vger.kernel.org
Signed-off-by: Kees Cook <keescook@chromium.org>

drivers/ide/ide-io.c

@@ -611,9 +611,9 @@ static int drive_is_ready(ide_drive_t *drive)
  *	logic that wants cleaning up.
  */
  
-void ide_timer_expiry (unsigned long data)
+void ide_timer_expiry (struct timer_list *t)
 {
-	ide_hwif_t	*hwif = (ide_hwif_t *)data;
+	ide_hwif_t	*hwif = from_timer(hwif, t, timer);
 	ide_drive_t	*uninitialized_var(drive);
 	ide_handler_t	*handler;
 	unsigned long	flags;

drivers/ide/ide-probe.c

@@ -1184,7 +1184,7 @@ static void ide_init_port_data(ide_hwif_t *hwif, unsigned int index)
 
 	spin_lock_init(&hwif->lock);
 
-	setup_timer(&hwif->timer, &ide_timer_expiry, (unsigned long)hwif);
+	timer_setup(&hwif->timer, ide_timer_expiry, 0);
 
 	init_completion(&hwif->gendev_rel_comp);
 

include/linux/ide.h

@@ -1211,7 +1211,7 @@ extern int ide_wait_not_busy(ide_hwif_t *hwif, unsigned long timeout);
 
 extern void ide_stall_queue(ide_drive_t *drive, unsigned long timeout);
 
-extern void ide_timer_expiry(unsigned long);
+extern void ide_timer_expiry(struct timer_list *t);
 extern irqreturn_t ide_intr(int irq, void *dev_id);
 extern void do_ide_request(struct request_queue *);
 extern void ide_requeue_and_plug(ide_drive_t *drive, struct request *rq);