In exit path of interrupt_handler(), dc->flip map is traversed bit by bit to find and clear set bits and call tty_flip_buffer_push() for corresponding ports. We can do it better by using for_each_test_and_clear_bit(), because it skips already clear bits. Signed-off-by: Yury Norov <yury.norov@xxxxxxxxx> --- drivers/tty/nozomi.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/drivers/tty/nozomi.c b/drivers/tty/nozomi.c index 02cd40147b3a..de0503247391 100644 --- a/drivers/tty/nozomi.c +++ b/drivers/tty/nozomi.c @@ -1220,9 +1220,8 @@ static irqreturn_t interrupt_handler(int irq, void *dev_id) exit_handler: spin_unlock(&dc->spin_mutex); - for (a = 0; a < NOZOMI_MAX_PORTS; a++) - if (test_and_clear_bit(a, &dc->flip)) - tty_flip_buffer_push(&dc->port[a].port); + for_each_test_and_clear_bit(a, &dc->flip, NOZOMI_MAX_PORTS) + tty_flip_buffer_push(&dc->port[a].port); return IRQ_HANDLED; none: -- 2.39.2
