linux-kernel - [PATCH v3 4/4] net: davinci_mdio: simplify IO memory mapping

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Date:	Wed, 30 Apr 2014 15:23:36 +0300
From:	Grygorii Strashko <grygorii.strashko@...com>
To:	Florian Fainelli <f.fainelli@...il.com>, <netdev@...r.kernel.org>
CC:	Randy Dunlap <rdunlap@...radead.org>,
	Jonathan Cameron <jic23@...nel.org>,
	"David S. Miller" <davem@...emloft.net>,
	<santosh.shilimkar@...com>, Sekhar Nori <nsekhar@...com>,
	<linux-doc@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<davinci-linux-open-source@...ux.davincidsp.com>,
	<sergei.shtylyov@...entembedded.com>, <prabhakar.csengg@...il.com>,
	Grygorii Strashko <grygorii.strashko@...com>
Subject: [PATCH v3 4/4] net: davinci_mdio: simplify IO memory mapping

Simplify IO memory mapping by using devm_ioremap_resource()
which will do all errors handling and reporting for us.

Acked-and-tested-by: Lad, Prabhakar <prabhakar.csengg@...il.com>
Signed-off-by: Grygorii Strashko <grygorii.strashko@...com>
---
 drivers/net/ethernet/ti/davinci_mdio.c |   21 +++------------------
 1 file changed, 3 insertions(+), 18 deletions(-)

diff --git a/drivers/net/ethernet/ti/davinci_mdio.c b/drivers/net/ethernet/ti/davinci_mdio.c
index 4757198..34e97ec 100644
--- a/drivers/net/ethernet/ti/davinci_mdio.c
+++ b/drivers/net/ethernet/ti/davinci_mdio.c
@@ -363,24 +363,9 @@ static int davinci_mdio_probe(struct platform_device *pdev)
 	spin_lock_init(&data->lock);
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!res) {
-		dev_err(dev, "could not find register map resource\n");
-		ret = -ENOENT;
-		goto bail_out;
-	}
-
-	res = devm_request_mem_region(dev, res->start, resource_size(res),
-					    dev_name(dev));
-	if (!res) {
-		dev_err(dev, "could not allocate register map resource\n");
-		ret = -ENXIO;
-		goto bail_out;
-	}
-
-	data->regs = devm_ioremap_nocache(dev, res->start, resource_size(res));
-	if (!data->regs) {
-		dev_err(dev, "could not map mdio registers\n");
-		ret = -ENOMEM;
+	data->regs = devm_ioremap_resource(dev, res);
+	if (IS_ERR(data->regs)) {
+		ret = PTR_ERR(data->regs);
 		goto bail_out;
 	}
 
-- 
1.7.9.5

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