linux-kernel - [PATCH 3/3] video: xilinxfb: Simplify error path

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Message-Id: <940bbdfc5c67282ab461b9c82b55f18fc34c959d.1378965270.git.michal.simek@xilinx.com>
Date:	Thu, 12 Sep 2013 07:54:34 +0200
From:	Michal Simek <michal.simek@...inx.com>
To:	linux-kernel@...r.kernel.org, monstr@...str.eu
Cc:	Jean-Christophe Plagniol-Villard <plagnioj@...osoft.com>,
	Tomi Valkeinen <tomi.valkeinen@...com>,
	linux-fbdev@...r.kernel.org
Subject: [PATCH 3/3] video: xilinxfb: Simplify error path

devm_iounmap is called automatically that's why remove it from the code
dev_set_drvdata(dev, NULL) is called by generic code
after device_release or on probe failure.

Signed-off-by: Michal Simek <michal.simek@...inx.com>
---
 drivers/video/xilinxfb.c | 28 ++++++----------------------
 1 file changed, 6 insertions(+), 22 deletions(-)

diff --git a/drivers/video/xilinxfb.c b/drivers/video/xilinxfb.c
index fd9c430..7e3036c 100644
--- a/drivers/video/xilinxfb.c
+++ b/drivers/video/xilinxfb.c
@@ -260,10 +260,9 @@ static int xilinxfb_assign(struct platform_device *pdev,

 		res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 		drvdata->regs = devm_ioremap_resource(&pdev->dev, res);
-		if (IS_ERR(drvdata->regs)) {
-			rc = PTR_ERR(drvdata->regs);
-			goto err_region;
-		}
+		if (IS_ERR(drvdata->regs))
+			return PTR_ERR(drvdata->regs);
+
 		drvdata->regs_phys = res->start;
 	}

@@ -279,11 +278,7 @@ static int xilinxfb_assign(struct platform_device *pdev,

 	if (!drvdata->fb_virt) {
 		dev_err(dev, "Could not allocate frame buffer memory\n");
-		rc = -ENOMEM;
-		if (drvdata->flags & BUS_ACCESS_FLAG)
-			goto err_fbmem;
-		else
-			goto err_region;
+		return -ENOMEM;
 	}

 	/* Clear (turn to black) the framebuffer */
@@ -363,13 +358,6 @@ err_cmap:
 	/* Turn off the display */
 	xilinx_fb_out32(drvdata, REG_CTRL, 0);

-err_fbmem:
-	if (drvdata->flags & BUS_ACCESS_FLAG)
-		devm_iounmap(dev, drvdata->regs);
-
-err_region:
-	dev_set_drvdata(dev, NULL);
-
 	return rc;
 }

@@ -394,16 +382,12 @@ static int xilinxfb_release(struct device *dev)
 	/* Turn off the display */
 	xilinx_fb_out32(drvdata, REG_CTRL, 0);

-	/* Release the resources, as allocated based on interface */
-	if (drvdata->flags & BUS_ACCESS_FLAG)
-		devm_iounmap(dev, drvdata->regs);
 #ifdef CONFIG_PPC_DCR
-	else
+	/* Release the resources, as allocated based on interface */
+	if (!(drvdata->flags & BUS_ACCESS_FLAG))
 		dcr_unmap(drvdata->dcr_host, drvdata->dcr_len);
 #endif

-	dev_set_drvdata(dev, NULL);
-
 	return 0;
 }

--
1.8.2.3


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