+ if (transition_latency) {
+ *transition_latency = (tv2.tv_sec - tv1.tv_sec) * USEC_PER_SEC +
+ tv2.tv_usec - tv1.tv_usec;
+ dprintk("transition latency is %u uSec\n", *transition_latency);
+
+ /* convert uSec to nSec and add 20% for safety reasons */
+ *transition_latency *= 1200;
+
+ /* check if the latency measurement is too high or too low
+ * and set it to a safe value (500uSec) in that case
+ */
+ if (*transition_latency > 10000000 || *transition_latency < 50000) {
+ printk (KERN_WARNING "speedstep: frequency transition measured seems out of "
+ "range (%u nSec), falling back to a safe one of %u nSec.\n",
+ *transition_latency, 500000);
+ *transition_latency = 500000;
+ }
+ }
+
+out: