[media] media: i.MX27 camera: Use spin_lock() inside the IRQ handler

We don't need to use spin_lock_irqsave() since there are not
any other IRQs that can race with this ISR.
Signed-off-by: NJavier Martin <javier.martin@vista-silicon.com>
Signed-off-by: NGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/mx2_camera.c

@@ -1286,9 +1286,8 @@ static irqreturn_t mx27_camera_emma_irq(int irq_emma, void *data)
 	struct mx2_camera_dev *pcdev = data;
 	unsigned int status = readl(pcdev->base_emma + PRP_INTRSTATUS);
 	struct mx2_buffer *buf;
-	unsigned long flags;
 
-	spin_lock_irqsave(&pcdev->lock, flags);
+	spin_lock(&pcdev->lock);
 
 	if (list_empty(&pcdev->active_bufs)) {
 		dev_warn(pcdev->dev, "%s: called while active list is empty\n",
@@ -1325,7 +1324,7 @@ static irqreturn_t mx27_camera_emma_irq(int irq_emma, void *data)
 	}
 
 irq_ok:
-	spin_unlock_irqrestore(&pcdev->lock, flags);
+	spin_unlock(&pcdev->lock);
 	writel(status, pcdev->base_emma + PRP_INTRSTATUS);
 
 	return IRQ_HANDLED;