From: H Hartley Sweeten <hartleys@visionengravers.com>
Date: Mon, 14 Dec 2009 21:48:34 +0000 (-0500)
Subject: mtd: orion_nand.c: add error handling and use resource_size()
X-Git-Tag: firefly_0821_release~9833^2~2079^2~149
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=e99030609e27abff7e1a868cb56384c678b09984;p=firefly-linux-kernel-4.4.55.git

mtd: orion_nand.c: add error handling and use resource_size()

Use platform_get_resource() to fetch the memory resource and
add error handling for when it is missing. Use resource_size()
for the ioremap().

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
---

diff --git a/drivers/mtd/nand/orion_nand.c b/drivers/mtd/nand/orion_nand.c
index f59c07427af3..990346036d37 100644
--- a/drivers/mtd/nand/orion_nand.c
+++ b/drivers/mtd/nand/orion_nand.c
@@ -74,6 +74,7 @@ static int __init orion_nand_probe(struct platform_device *pdev)
 	struct mtd_info *mtd;
 	struct nand_chip *nc;
 	struct orion_nand_data *board;
+	struct resource *res;
 	void __iomem *io_base;
 	int ret = 0;
 #ifdef CONFIG_MTD_PARTITIONS
@@ -89,8 +90,13 @@ static int __init orion_nand_probe(struct platform_device *pdev)
 	}
 	mtd = (struct mtd_info *)(nc + 1);
 
-	io_base = ioremap(pdev->resource[0].start,
-			pdev->resource[0].end - pdev->resource[0].start + 1);
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!res) {
+		err = -ENODEV;
+		goto no_res;
+	}
+
+	io_base = ioremap(res->start, resource_size(res));
 	if (!io_base) {
 		printk(KERN_ERR "orion_nand: ioremap failed\n");
 		ret = -EIO;