diff --git a/drivers/mfd/tps65910.c b/drivers/mfd/tps65910.c
index bf649cf..e318248 100644
--- a/drivers/mfd/tps65910.c
+++ b/drivers/mfd/tps65910.c
@@ -71,7 +71,7 @@
 	u8 msg[TPS65910_MAX_REGISTER + 1];
 	int ret;
 
-	if (bytes > (TPS65910_MAX_REGISTER + 1))
+	if (bytes > TPS65910_MAX_REGISTER)
 		return -EINVAL;
 
 	msg[0] = reg;