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authorBenjamin Tissoires <benjamin.tissoires@redhat.com>2015-04-05 23:41:35 +0300
committerDmitry Torokhov <dmitry.torokhov@gmail.com>2015-04-06 19:37:33 +0300
commit73e8a8e777d8dde6a67df1cf4b18371e27d080d8 (patch)
tree542890fc7998f5592a6e7f6cb32fa613e53786d6 /drivers/input
parent61125591e1de23992279938eebf8c54f47d7e0a9 (diff)
downloadlinux-73e8a8e777d8dde6a67df1cf4b18371e27d080d8.tar.xz
Input: MT - make slot assignment work for overcovered solutions
The recent inclusion of a deassignment cost in the slot assignment algorithm did not properly account for the corner cases where the solutions are overcovered. This change makes sure the resulting assignment is unique, allocating new slots when necessary. Signed-off-by: Henrik Rydberg <rydberg@bitmath.org> Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com> Acked-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Diffstat (limited to 'drivers/input')
-rw-r--r--drivers/input/input-mt.c26
1 files changed, 17 insertions, 9 deletions
diff --git a/drivers/input/input-mt.c b/drivers/input/input-mt.c
index cb150a1dbaff..b097af269e00 100644
--- a/drivers/input/input-mt.c
+++ b/drivers/input/input-mt.c
@@ -365,27 +365,35 @@ static void input_mt_set_slots(struct input_mt *mt,
int *slots, int num_pos)
{
struct input_mt_slot *s;
- int *w = mt->red, *p;
+ int *w = mt->red, j;
- for (p = slots; p != slots + num_pos; p++)
- *p = -1;
+ for (j = 0; j != num_pos; j++)
+ slots[j] = -1;
for (s = mt->slots; s != mt->slots + mt->num_slots; s++) {
if (!input_mt_is_active(s))
continue;
- for (p = slots; p != slots + num_pos; p++)
- if (*w++ < 0)
- *p = s - mt->slots;
+
+ for (j = 0; j != num_pos; j++) {
+ if (w[j] < 0) {
+ slots[j] = s - mt->slots;
+ break;
+ }
+ }
+
+ w += num_pos;
}
for (s = mt->slots; s != mt->slots + mt->num_slots; s++) {
if (input_mt_is_active(s))
continue;
- for (p = slots; p != slots + num_pos; p++)
- if (*p < 0) {
- *p = s - mt->slots;
+
+ for (j = 0; j != num_pos; j++) {
+ if (slots[j] < 0) {
+ slots[j] = s - mt->slots;
break;
}
+ }
}
}