linux-kernel - [PATCH v3 9/9] media: davinci: vpif_display: Convert to devm

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Message-Id: <1369569612-30915-10-git-send-email-prabhakar.csengg@gmail.com>
Date:	Sun, 26 May 2013 17:30:12 +0530
From:	Prabhakar Lad <prabhakar.csengg@...il.com>
To:	Hans Verkuil <hans.verkuil@...co.com>,
	Mauro Carvalho Chehab <mchehab@...hat.com>,
	LMML <linux-media@...r.kernel.org>,
	Laurent Pinchart <laurent.pinchart@...asonboard.com>
Cc:	DLOS <davinci-linux-open-source@...ux.davincidsp.com>,
	LKML <linux-kernel@...r.kernel.org>,
	"Lad, Prabhakar" <prabhakar.csengg@...il.com>
Subject: [PATCH v3 9/9] media: davinci: vpif_display: Convert to devm_* api

From: Lad, Prabhakar <prabhakar.csengg@...il.com>

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@...il.com>
---
 drivers/media/platform/davinci/vpif_display.c |   35 ++++++------------------
 1 files changed, 9 insertions(+), 26 deletions(-)

diff --git a/drivers/media/platform/davinci/vpif_display.c b/drivers/media/platform/davinci/vpif_display.c
index 7bcfe7d..e2f080b 100644
--- a/drivers/media/platform/davinci/vpif_display.c
+++ b/drivers/media/platform/davinci/vpif_display.c
@@ -1718,15 +1718,14 @@ 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++;
@@ -1744,7 +1743,7 @@ 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 */
@@ -1878,13 +1877,8 @@ vpif_sd_error:
 		/* 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;
 }
@@ -1894,20 +1888,9 @@ vpif_int_err:
  */
 static int vpif_remove(struct platform_device *device)
 {
-	struct platform_device *pdev;
 	struct channel_obj *ch;
-	struct resource *res;
-	int irq_num;
 	int i = 0;
 
-	pdev = container_of(vpif_dev, struct platform_device, dev);
-	while ((res = platform_get_resource(pdev, 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++;
-	}
-
 	v4l2_device_unregister(&vpif_obj.v4l2_dev);
 
 	kfree(vpif_obj.sd);
-- 
1.7.0.4

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