1. NAME▲

scsi_test_unit_ready - test if unit is ready

2. SYNOPSIS ▲

int scsi_test_unit_ready(struct scsi_device *  sdev , int  timeout , int  retries , struct scsi_sense_hdr *  sshdr_external );

3. ARGUMENTS ▲

sdev
    scsi device to change the state of.

timeout
    command timeout

retries
    number of retries before failing

sshdr_external
    Optional pointer to struct scsi_sense_hdr for returning sense. Make sure that this is cleared before passing in.

4. DESCRIPTION ▲

Returns zero if unsuccessful or an error if TUR failed. For removable media, UNIT_ATTENTION sets ->changed flag.

5. AUTHORS ▲

James Bottomley <>
    Author.

Rob Landley <>
    Author.

6. COPYRIGHT ▲