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Input: hgpk - detect simple mode overflows

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Based on work by Paul Fox.

Signed-off-by: Daniel Drake <dsd@laptop.org>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
This commit is contained in:
Daniel Drake 2010-11-15 01:28:54 -08:00 committed by Dmitry Torokhov
parent 87abb6bbdb
commit 67f56bb0f4
1 changed files with 5 additions and 0 deletions
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5
drivers/input/mouse/hgpk.c
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@ -431,6 +431,11 @@ static void hgpk_process_simple_packet(struct psmouse *psmouse)
int x = packet[1] - ((packet[0] << 4) & 0x100);
int y = ((packet[0] << 3) & 0x100) - packet[2];
if (packet[0] & 0xc0)
hgpk_dbg(psmouse,
"overflow -- 0x%02x 0x%02x 0x%02x\n",
packet[0], packet[1], packet[2]);
if (hgpk_discard_decay_hack(psmouse, x, y)) {
if (tpdebug)
hgpk_dbg(psmouse, "discarding\n");