1 files changed, 2 insertions, 4 deletions

diff --git a/drivers/mfd/asic3.c b/drivers/mfd/asic3.c
index ebe889392b6d..d5dd0dfae872 100644
--- a/drivers/mfd/asic3.c
+++ b/drivers/mfd/asic3.c
@@ -623,7 +623,6 @@ static int __init asic3_probe(struct platform_device *pdev)
         struct asic3 *asic;
         struct resource *mem;
         unsigned long clksel;
-        int map_size;
         int ret = 0;
 
         asic = kzalloc(sizeof(struct asic3), GFP_KERNEL);
@@ -643,8 +642,7 @@ static int __init asic3_probe(struct platform_device *pdev)
                 goto out_free;
         }
 
-        map_size = mem->end - mem->start + 1;
-        asic->mapping = ioremap(mem->start, map_size);
+        asic->mapping = ioremap(mem->start, resource_size(mem));
         if (!asic->mapping) {
                 ret = -ENOMEM;
                 dev_err(asic->dev, "Couldn't ioremap\n");
@@ -654,7 +652,7 @@ static int __init asic3_probe(struct platform_device *pdev)
         asic->irq_base = pdata->irq_base;
 
         /* calculate bus shift from mem resource */
-        asic->bus_shift = 2 - (map_size >> 12);
+        asic->bus_shift = 2 - (resource_size(mem) >> 12);
 
         clksel = 0;
         asic3_write_register(asic, ASIC3_OFFSET(CLOCK, SEL), clksel);