From 46dcd1cc2b2fa43bd99f39c7c236d5cdb80522f0 Mon Sep 17 00:00:00 2001 From: Christophe JAILLET Date: Fri, 23 Jul 2021 17:41:52 +0200 Subject: [PATCH] HID: logitech-hidpp: Use 'atomic_inc_return' instead of hand-writing it This function logs a warning if the workqueue gets too big. In order to save a few cycles, use 'atomic_inc_return()' instead of an 'atomic_inc()/atomic_read()' sequence. This axes a line of code and saves a 'atomic_read()' call. Signed-off-by: Christophe JAILLET Signed-off-by: Jiri Kosina --- drivers/hid/hid-logitech-hidpp.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/drivers/hid/hid-logitech-hidpp.c b/drivers/hid/hid-logitech-hidpp.c index 61635e6..a7fa352 100644 --- a/drivers/hid/hid-logitech-hidpp.c +++ b/drivers/hid/hid-logitech-hidpp.c @@ -2240,11 +2240,10 @@ static int hidpp_ff_queue_work(struct hidpp_ff_private_data *data, int effect_id wd->size = size; memcpy(wd->params, params, size); - atomic_inc(&data->workqueue_size); + s = atomic_inc_return(&data->workqueue_size); queue_work(data->wq, &wd->work); /* warn about excessive queue size */ - s = atomic_read(&data->workqueue_size); if (s >= 20 && s % 20 == 0) hid_warn(data->hidpp->hid_dev, "Force feedback command queue contains %d commands, causing substantial delays!", s); -- 2.7.4