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 <anshul.g@samsung.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

diff --git a/drivers/input/input.c b/drivers/input/input.c
index 04217c2e345c0ddcaa8e5b1d2525dbb14b5854fe..213e3a1903ee1ddecf84a797ba19da6fa8d7b50c 100644 (file)
--- 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;