1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/ata/pata_octeon_cf.c b/drivers/ata/pata_octeon_cf.c
index d6f69561dc86..37ef416c1242 100644
--- a/drivers/ata/pata_octeon_cf.c
+++ b/drivers/ata/pata_octeon_cf.c
@@ -853,7 +853,7 @@ static int __devinit octeon_cf_probe(struct platform_device *pdev)
                         return -EINVAL;
 
                 cs1 = devm_ioremap_nocache(&pdev->dev, res_cs1->start,
-                                           res_cs0->end - res_cs1->start + 1);
+                                           resource_size(res_cs1));
 
                 if (!cs1)
                         return -ENOMEM;