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PS/2 bus manager check all valid values

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According to korli "Valid values seem to be between 255 and -256" which
is verified by syslog running on virtual box with a PS/2 mouse on Haiku
hrev47470.

Fixes #7802

Signed-off-by: John Scipione <[email protected]>
This commit is contained in:
John Scipione
2016-08-22 11:24:44 -07:00
parent a394a16a61
commit ca45c75350
1 changed files with 2 additions and 2 deletions
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src/add-ons/kernel/bus_managers/ps2/ps2_standard_mouse.cpp
+2 -2
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@@ -230,7 +230,7 @@ standard_mouse_handle_int(ps2_dev* dev)
if (cookie->packet_index == 1) { if (cookie->packet_index == 1) {
int xDelta int xDelta
= ((cookie->buffer[0] & 0x10) ? 0xFFFFFF00 : 0) | data; = ((cookie->buffer[0] & 0x10) ? 0xFFFFFF00 : 0) | data;
if (xDelta < -100 || xDelta > 100) { if (xDelta < -256 || xDelta > 255) {
INFO("ps2: strange mouse data, x-delta %d, trying resync\n", INFO("ps2: strange mouse data, x-delta %d, trying resync\n",
xDelta); xDelta);
cookie->packet_index = 0; cookie->packet_index = 0;
@@ -240,7 +240,7 @@ standard_mouse_handle_int(ps2_dev* dev)
if (cookie->packet_index == 2) { if (cookie->packet_index == 2) {
int yDelta int yDelta
= ((cookie->buffer[0] & 0x20) ? 0xFFFFFF00 : 0) | data; = ((cookie->buffer[0] & 0x20) ? 0xFFFFFF00 : 0) | data;
if (yDelta < -100 || yDelta > 100) { if (yDelta < -256 || yDelta > 255) {
INFO("ps2: strange mouse data, y-delta %d, trying resync\n", INFO("ps2: strange mouse data, y-delta %d, trying resync\n",
yDelta); yDelta);
cookie->packet_index = 0; cookie->packet_index = 0;