linux-kernel - [PATCH v3 2/9] media: davinci: vpif: Convert to devm

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Date:	Sun, 26 May 2013 17:30:05 +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 2/9] media: davinci: vpif: Convert to devm_* api

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

Use devm_ioremap_resource instead of reques_mem_region()/ioremap().
This ensures more consistent error values and simplifies error paths.

Signed-off-by: Lad, Prabhakar <prabhakar.csengg@...il.com>
Acked-by: Laurent Pinchart <laurent.pinchart@...asonboard.com>
---
 drivers/media/platform/davinci/vpif.c |   27 ++++-----------------------
 1 files changed, 4 insertions(+), 23 deletions(-)

diff --git a/drivers/media/platform/davinci/vpif.c b/drivers/media/platform/davinci/vpif.c
index 761c825..f857d8f 100644
--- a/drivers/media/platform/davinci/vpif.c
+++ b/drivers/media/platform/davinci/vpif.c
@@ -37,8 +37,6 @@ MODULE_LICENSE("GPL");
 #define VPIF_CH2_MAX_MODES	(15)
 #define VPIF_CH3_MAX_MODES	(02)
 
-static resource_size_t	res_len;
-static struct resource	*res;
 spinlock_t vpif_lock;
 
 void __iomem *vpif_base;
@@ -421,23 +419,12 @@ EXPORT_SYMBOL(vpif_channel_getfid);
 
 static int vpif_probe(struct platform_device *pdev)
 {
-	int status = 0;
+	static struct resource	*res;
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!res)
-		return -ENOENT;
-
-	res_len = resource_size(res);
-
-	res = request_mem_region(res->start, res_len, res->name);
-	if (!res)
-		return -EBUSY;
-
-	vpif_base = ioremap(res->start, res_len);
-	if (!vpif_base) {
-		status = -EBUSY;
-		goto fail;
-	}
+	vpif_base = devm_request_and_ioremap(&pdev->dev, res);
+	if (IS_ERR(vpif_base))
+		return PTR_ERR(vpif_base);
 
 	pm_runtime_enable(&pdev->dev);
 	pm_runtime_get(&pdev->dev);
@@ -445,17 +432,11 @@ static int vpif_probe(struct platform_device *pdev)
 	spin_lock_init(&vpif_lock);
 	dev_info(&pdev->dev, "vpif probe success\n");
 	return 0;
-
-fail:
-	release_mem_region(res->start, res_len);
-	return status;
 }
 
 static int vpif_remove(struct platform_device *pdev)
 {
 	pm_runtime_disable(&pdev->dev);
-	iounmap(vpif_base);
-	release_mem_region(res->start, res_len);
 	return 0;
 }
 
-- 
1.7.0.4

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