static int agpioc_acquire_wrap(agp_file_private * priv, unsigned long arg)
{
agp_controller *controller;
if (!(test_bit(AGP_FF_ALLOW_CONTROLLER, &priv->access_flags))) {
return -EPERM;
}
if (agp_fe.current_controller != NULL) {
return -EBUSY;
}
if ((agp_backend_acquire()) == 0) {
agp_fe.backend_acquired = TRUE;
} else {
return -EBUSY;
}
controller = agp_find_controller_by_pid(priv->my_pid);
if (controller != NULL) {
agp_controller_make_current(controller);
} else {
controller = agp_create_controller(priv->my_pid);
if (controller == NULL) {
agp_fe.backend_acquired = FALSE;
agp_backend_release();
return -ENOMEM;
}
agp_insert_controller(controller);
agp_controller_make_current(controller);
}
set_bit(AGP_FF_IS_CONTROLLER, &priv->access_flags);
set_bit(AGP_FF_IS_VALID, &priv->access_flags);
return 0;
}
static int agpioc_acquire_wrap(struct agp_file_private *priv)
{
int ret;
struct agp_controller *controller;
DBG("");
if (!(test_bit(AGP_FF_ALLOW_CONTROLLER, &priv->access_flags)))
return -EPERM;
if (agp_fe.current_controller != NULL)
return -EBUSY;
ret = agp_backend_acquire();
if (ret == 0)
agp_fe.backend_acquired = TRUE;
else
return ret;
controller = agp_find_controller_by_pid(priv->my_pid);
if (controller != NULL) {
agp_controller_make_current(controller);
} else {
controller = agp_create_controller(priv->my_pid);
if (controller == NULL) {
agp_fe.backend_acquired = FALSE;
agp_backend_release();
return -ENOMEM;
}
agp_insert_controller(controller);
agp_controller_make_current(controller);
}
set_bit(AGP_FF_IS_CONTROLLER, &priv->access_flags);
set_bit(AGP_FF_IS_VALID, &priv->access_flags);
return 0;
}