1 files changed, 1 insertions, 1 deletions

diff --git a/arch/powerpc/sysdev/ipic.c b/arch/powerpc/sysdev/ipic.c
index 7367d17364cb..95da897f05a7 100644
--- a/arch/powerpc/sysdev/ipic.c
+++ b/arch/powerpc/sysdev/ipic.c
@@ -736,7 +736,7 @@ struct ipic * __init ipic_init(struct device_node *node, unsigned int flags)
                 return NULL;
         }
 
-        ipic->regs = ioremap(res.start, res.end - res.start + 1);
+        ipic->regs = ioremap(res.start, resource_size(&res));
 
         ipic->irqhost->host_data = ipic;