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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>
This commit is contained in:
H Hartley Sweeten 2009-12-14 16:48:34 -05:00 committed by David Woodhouse
parent 4442241ef6
commit e99030609e
1 changed files with 8 additions and 2 deletions
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10
drivers/mtd/nand/orion_nand.c
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@ -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;