iop-adma.c: use resource_size()

The size of the requested and ioremaped memory is off by 1.
Use resource_size() to get the correct value.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/dma/iop-adma.c b/drivers/dma/iop-adma.c
index 645ca8d54ec4..ca6e6a0cb793 100644
--- a/drivers/dma/iop-adma.c
+++ b/drivers/dma/iop-adma.c
@@ -1470,7 +1470,7 @@ static int __devinit iop_adma_probe(struct platform_device *pdev)
                 return -ENODEV;
 
         if (!devm_request_mem_region(&pdev->dev, res->start,
-                                res->end - res->start, pdev->name))
+                                resource_size(res), pdev->name))
                 return -EBUSY;
 
         adev = kzalloc(sizeof(*adev), GFP_KERNEL);
@@ -1542,7 +1542,7 @@ static int __devinit iop_adma_probe(struct platform_device *pdev)
         iop_chan->device = adev;
 
         iop_chan->mmr_base = devm_ioremap(&pdev->dev, res->start,
-                                        res->end - res->start);
+                                        resource_size(res));
         if (!iop_chan->mmr_base) {
                 ret = -ENOMEM;
                 goto err_free_iop_chan;