1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/clk/clk-stm32f4.c b/drivers/clk/clk-stm32f4.c
index b9b12a742970..3f6f7ad39490 100644
--- a/drivers/clk/clk-stm32f4.c
+++ b/drivers/clk/clk-stm32f4.c
@@ -268,7 +268,7 @@ static int stm32f4_rcc_lookup_clk_idx(u8 primary, u8 secondary)
         memcpy(table, stm32f42xx_gate_map, sizeof(table));
 
         /* only bits set in table can be used as indices */
-        if (WARN_ON(secondary > 8 * sizeof(table) ||
+        if (WARN_ON(secondary >= BITS_PER_BYTE * sizeof(table) ||
                     0 == (table[BIT_ULL_WORD(secondary)] &
                           BIT_ULL_MASK(secondary))))
                 return -EINVAL;