1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/mfd/wm8400-core.c b/drivers/mfd/wm8400-core.c
index 865ce013a821..e08aafa663dc 100644
--- a/drivers/mfd/wm8400-core.c
+++ b/drivers/mfd/wm8400-core.c
@@ -118,7 +118,7 @@ static int wm8400_read(struct wm8400 *wm8400, u8 reg, int num_regs, u16 *dest)
 {
         int i, ret = 0;
 
-        BUG_ON(reg + num_regs - 1 > ARRAY_SIZE(wm8400->reg_cache));
+        BUG_ON(reg + num_regs > ARRAY_SIZE(wm8400->reg_cache));
 
         /* If there are any volatile reads then read back the entire block */
         for (i = reg; i < reg + num_regs; i++)
@@ -144,7 +144,7 @@ static int wm8400_write(struct wm8400 *wm8400, u8 reg, int num_regs,
 {
         int ret, i;
 
-        BUG_ON(reg + num_regs - 1 > ARRAY_SIZE(wm8400->reg_cache));
+        BUG_ON(reg + num_regs > ARRAY_SIZE(wm8400->reg_cache));
 
         for (i = 0; i < num_regs; i++) {
                 BUG_ON(!reg_data[reg + i].writable);