[media] media: davinci: vpif_display: Convert to devm_* api

use devm_request_irq() instead of request_irq(). This ensures
more consistent error values and simplifies error paths.
Signed-off-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/platform/davinci/vpif_display.c

@@ -1652,15 +1652,14 @@ static __init int vpif_probe(struct platform_device *pdev)
 
 	while ((res = platform_get_resource(pdev, IORESOURCE_IRQ, res_idx))) {
 		for (i = res->start; i <= res->end; i++) {
-			if (request_irq(i, vpif_channel_isr, IRQF_SHARED,
-					"VPIF_Display", (void *)
-					(&vpif_obj.dev[res_idx]->channel_id))) {
-				err = -EBUSY;
-				for (j = 0; j < i; j++)
-					free_irq(j, (void *)
-					(&vpif_obj.dev[res_idx]->channel_id));
+			err = devm_request_irq(&pdev->dev, i, vpif_channel_isr,
+					     IRQF_SHARED, "VPIF_Display",
+					     (void *)(&vpif_obj.dev[res_idx]->
+					     channel_id));
+			if (err) {
+				err = -EINVAL;
 				vpif_err("VPIF IRQ request failed\n");
-				goto vpif_int_err;
+				goto vpif_unregister;
 			}
 		}
 		res_idx++;
@@ -1678,7 +1677,7 @@ static __init int vpif_probe(struct platform_device *pdev)
 				video_device_release(ch->video_dev);
 			}
 			err = -ENOMEM;
-			goto vpif_int_err;
+			goto vpif_unregister;
 		}
 
 		/* Initialize field of video device */
@@ -1812,13 +1811,8 @@ static __init int vpif_probe(struct platform_device *pdev)
 		/* Note: does nothing if ch->video_dev == NULL */
 		video_device_release(ch->video_dev);
 	}
-vpif_int_err:
+vpif_unregister:
 	v4l2_device_unregister(&vpif_obj.v4l2_dev);
-	for (i = 0; i < res_idx; i++) {
-		res = platform_get_resource(pdev, IORESOURCE_IRQ, i);
-		for (j = res->start; j <= res->end; j++)
-			free_irq(j, (void *)(&vpif_obj.dev[i]->channel_id));
-	}
 
 	return err;
 }
@@ -1829,16 +1823,7 @@ static __init int vpif_probe(struct platform_device *pdev)
 static int vpif_remove(struct platform_device *device)
 {
 	struct channel_obj *ch;
-	struct resource *res;
-	int irq_num;
-	int i = 0;
-
-	while ((res = platform_get_resource(device, IORESOURCE_IRQ, i))) {
-		for (irq_num = res->start; irq_num <= res->end; irq_num++)
-			free_irq(irq_num,
-				 (void *)(&vpif_obj.dev[i]->channel_id));
-		i++;
-	}
+	int i;
 
 	v4l2_device_unregister(&vpif_obj.v4l2_dev);