hwrng: timeriomem - use resource_size

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Acked-by: Matt Mackall <mpm@selenic.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

1 files changed, 1 insertions, 2 deletions

diff --git a/drivers/char/hw_random/timeriomem-rng.c b/drivers/char/hw_random/timeriomem-rng.c
index a94e930575f2..a8428e6f64a9 100644
--- a/drivers/char/hw_random/timeriomem-rng.c
+++ b/drivers/char/hw_random/timeriomem-rng.c
@@ -100,8 +100,7 @@ static int __devinit timeriomem_rng_probe(struct platform_device *pdev)
 
         timeriomem_rng_data = pdev->dev.platform_data;
 
-        timeriomem_rng_data->address = ioremap(res->start,
-                                                res->end - res->start + 1);
+        timeriomem_rng_data->address = ioremap(res->start, resource_size(res));
         if (!timeriomem_rng_data->address)
                 return -EIO;