* busy signal.
*
* As devices can have deep queues and be unfair in how the queued commands
- * are executed, soley depending on rq wait may not result in satisfactory
+ * are executed, solely depending on rq wait may not result in satisfactory
* control quality. For a better control quality, completion latency QoS
* parameters can be configured so that the device is considered saturated
* if N'th percentile completion latency rises above the set point.