[PATCH 2/2] wifi: morsemicro: mm81x: use hweight16() to calculate bit index

[Yury Norov]

Count the set bits through bit_pos with hweight16() and an inclusive
mask. Preserve the zero fallback and zero-based index.

Signed-off-by: Yury Norov <ynorov@xxxxxxxxxx>
---
 drivers/net/wireless/morsemicro/mm81x/mmrc.c | 8 +-------
 1 file changed, 1 insertion(+), 7 deletions(-)

diff --git a/drivers/net/wireless/morsemicro/mm81x/mmrc.c b/drivers/net/wireless/morsemicro/mm81x/mmrc.c
index 4cbc35535e07..6bedcdbcb61f 100644
--- a/drivers/net/wireless/morsemicro/mm81x/mmrc.c
+++ b/drivers/net/wireless/morsemicro/mm81x/mmrc.c
@@ -206,13 +206,7 @@ static const u32 sym_table[10] = { 24, 36, 48, 72, 96, 144, 192, 216, 256, 288 }
  */
 static u16 bit_index(u16 in, u32 bit_pos)
 {
-	u16 i;
-	u16 index = 0;
-
-	for (i = 0; i != bit_pos + 1; i++) {
-		if (((1u << i) & in) != 0)
-			index++;
-	}
+	u16 index = hweight16(in & GENMASK(bit_pos, 0));
 
 	if (index == 0) {
 		/* Could not match bit pos to caps */
-- 
2.53.0