XXXX cpudrv attach error handling is leaky

@@ -312,10 +312,16 @@
                  * activities.
                  */
                 cpudsp->cpudrv_pm.tq = ddi_taskq_create(dip,
                     "cpudrv_monitor", CPUDRV_TASKQ_THREADS,
                     TASKQ_DEFAULTPRI, 0);
+                if (cpudsp->cpudrv_pm.tq == NULL) {
+                        cpudrv_enabled = B_FALSE;
+                        cpudrv_free(cpudsp);
+                        ddi_soft_state_free(cpudrv_state, instance);
+                        return (DDI_FAILURE);
+                }
 
                 mutex_init(&cpudsp->cpudrv_pm.timeout_lock, NULL,
                     MUTEX_DRIVER, NULL);
                 cv_init(&cpudsp->cpudrv_pm.timeout_cv, NULL,
                     CV_DEFAULT, NULL);

@@ -346,10 +352,11 @@
 
                 if (!cpudrv_mach_init(cpudsp)) {
                         cmn_err(CE_WARN, "cpudrv_attach: instance %d: "
                             "cpudrv_mach_init failed", instance);
                         cpudrv_enabled = B_FALSE;
+                        ddi_taskq_destroy(cpudsp->cpudrv_pm.tq);
                         cpudrv_free(cpudsp);
                         ddi_soft_state_free(cpudrv_state, instance);
                         return (DDI_FAILURE);
                 }