1 files changed, 1 insertions, 1 deletions

diff --git a/arch/powerpc/sysdev/cpm1.c b/arch/powerpc/sysdev/cpm1.c
index 350787c83e2..5d7d59a43c4 100644
--- a/arch/powerpc/sysdev/cpm1.c
+++ b/arch/powerpc/sysdev/cpm1.c
@@ -148,7 +148,7 @@ unsigned int cpm_pic_init(void)
         if (ret)
                 goto end;
 
-        cpic_reg = ioremap(res.start, res.end - res.start + 1);
+        cpic_reg = ioremap(res.start, resource_size(&res));
         if (cpic_reg == NULL)
                 goto end;