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dix: don't allow more than MAX_VALUATORS on one device. 

Some keyboards (?) advertise more than MAX_VALUATORS axes. Parts of the
internal event delivery relies on not having more than MAX_VALUATOR axes, so
let's cap it down.
If there's real devices that require more than the current 36, I'm sure we can
bump this up.

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
This commit is contained in:
Peter Hutterer 2009-04-16 11:06:52 +10:00
parent edb70caf21
commit 74d0fc3aee
2 changed files with 10 additions and 0 deletions
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2
Xi/exevents.c
View File

@ -1119,6 +1119,8 @@ InitValuatorAxisStruct(DeviceIntPtr dev, int axnum, int minval, int maxval,
if (!dev || !dev->valuator || minval > maxval)
return;
if (axnum >= dev->valuator->numAxes)
return;
ax = dev->valuator->axes + axnum;

8
dix/devices.c
View File

@ -1088,6 +1088,14 @@ InitValuatorClassDeviceStruct(DeviceIntPtr dev, int numAxes,
if (!dev)
return FALSE;
if (numAxes >= MAX_VALUATORS)
{
LogMessage(X_WARNING,
"Device '%s' has %d axes, only using first %d.\n",
dev->name, numAxes, MAX_VALUATORS);
numAxes = MAX_VALUATORS;
}
valc = (ValuatorClassPtr)xcalloc(1, sizeof(ValuatorClassRec) +
numAxes * sizeof(AxisInfo) +
numAxes * sizeof(unsigned int));