diff --git a/drivers/staging/kpc2000/kpc_i2c/i2c_driver.c b/drivers/staging/kpc2000/kpc_i2c/i2c_driver.c
index 6bb6ad4abe87..1fc30dc687f9 100644
--- a/drivers/staging/kpc2000/kpc_i2c/i2c_driver.c
+++ b/drivers/staging/kpc2000/kpc_i2c/i2c_driver.c
@@ -632,7 +632,7 @@ int pi2c_probe(struct platform_device *pldev)
     priv->adapter.algo = &smbus_algorithm;
     
     res = platform_get_resource(pldev, IORESOURCE_MEM, 0);
-    priv->smba = (unsigned long)ioremap_nocache(res->start, res->end - res->start);
+    priv->smba = (unsigned long)ioremap_nocache(res->start, resource_size(res));
     
     priv->pldev = pldev;
     pldev->dev.platform_data = priv;
diff --git a/drivers/staging/kpc2000/kpc_spi/spi_driver.c b/drivers/staging/kpc2000/kpc_spi/spi_driver.c
index c0999e080577..074a578153d0 100644
--- a/drivers/staging/kpc2000/kpc_spi/spi_driver.c
+++ b/drivers/staging/kpc2000/kpc_spi/spi_driver.c
@@ -452,7 +452,7 @@ kp_spi_probe(struct platform_device *pldev)
         goto free_master;
     }
     
-    kpspi->phys = (unsigned long)ioremap_nocache(r->start, r->end - r->start);
+    kpspi->phys = (unsigned long)ioremap_nocache(r->start, resource_size(r));
     kpspi->base = (u64 __iomem *)kpspi->phys;
     
     status = spi_register_master(master);