From baf332c0f1cede26e9c2af6276b36b4c3a36e34a Mon Sep 17 00:00:00 2001 From: Anshul Garg Date: Sat, 13 Dec 2014 11:58:23 -0800 Subject: [PATCH] Input: optimize events_per_packet count calculation This patch avoids unnecessary operations while estimating events per packet for an input device when event type is not set. Signed-off-by: Anshul Garg Signed-off-by: Dmitry Torokhov --- drivers/input/input.c | 22 +++++++++++++--------- 1 file changed, 13 insertions(+), 9 deletions(-) diff --git a/drivers/input/input.c b/drivers/input/input.c index 04217c2e345c..213e3a1903ee 100644 --- a/drivers/input/input.c +++ b/drivers/input/input.c @@ -1974,18 +1974,22 @@ static unsigned int input_estimate_events_per_packet(struct input_dev *dev) events = mt_slots + 1; /* count SYN_MT_REPORT and SYN_REPORT */ - for (i = 0; i < ABS_CNT; i++) { - if (test_bit(i, dev->absbit)) { - if (input_is_mt_axis(i)) - events += mt_slots; - else - events++; + if (test_bit(EV_ABS, dev->evbit)) { + for (i = 0; i < ABS_CNT; i++) { + if (test_bit(i, dev->absbit)) { + if (input_is_mt_axis(i)) + events += mt_slots; + else + events++; + } } } - for (i = 0; i < REL_CNT; i++) - if (test_bit(i, dev->relbit)) - events++; + if (test_bit(EV_REL, dev->evbit)) { + for (i = 0; i < REL_CNT; i++) + if (test_bit(i, dev->relbit)) + events++; + } /* Make room for KEY and MSC events */ events += 7; -- 2.20.1