Hello Ching, > 1. Add driver parameter cmd_timeout, default value is ARCMSR_DEFAULT_TIMEOUT. > 2. Add slave_configure callback function to set device command timeout value. > 3. Update driver version to v1.40.00.06-20180504. I am not so keen on arcmsr overriding the timeout set by the admin or application. Also, instead of introducing this module parameter, why not simply ask the user to change rq_timeout? -- Martin K. Petersen Oracle Linux Engineering