diff options
Diffstat (limited to 'drivers/extcon')
| -rw-r--r-- | drivers/extcon/extcon-class.c | 16 |
1 files changed, 6 insertions, 10 deletions
diff --git a/drivers/extcon/extcon-class.c b/drivers/extcon/extcon-class.c index 1e1a3f17a782..1ce76a8d777b 100644 --- a/drivers/extcon/extcon-class.c +++ b/drivers/extcon/extcon-class.c @@ -89,17 +89,13 @@ static int check_mutually_exclusive(struct extcon_dev *edev, u32 new_state) return 0; for (i = 0; edev->mutually_exclusive[i]; i++) { - int count = 0, j; + int weight; u32 correspondants = new_state & edev->mutually_exclusive[i]; - u32 exp = 1; - - for (j = 0; j < 32; j++) { - if (exp & correspondants) - count++; - if (count > 1) - return i + 1; - exp <<= 1; - } + + /* calculate the total number of bits set */ + weight = hweight32(correspondants); + if (weight > 1) + return i + 1; } return 0; |