SCSI_TEST_UNIT_READY(9) SCSI mid layer SCSI_TEST_UNIT_READY(9)
NAME
scsi_test_unit_ready - test if unit is ready
SYNOPSIS
int scsi_test_unit_ready(struct scsi_device * sdev, int timeout, int retries, struct scsi_sense_hdr * sshdr_external);
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.
DESCRIPTION
Returns zero if unsuccessful or an error if TUR failed. For removable media, a return of NOT_READY or UNIT_ATTENTION is translated to
success, with the ->changed flag updated.
AUTHORS
James Bottomley <James.Bottomley@hansenpartnership.com>
Author.
Rob Landley <rob@landley.net>
Author.
COPYRIGHT
Kernel Hackers Manual 2.6. July 2010 SCSI_TEST_UNIT_READY(9)
