1SCSI_TEST_UNIT_READY(9)         SCSI mid layer         SCSI_TEST_UNIT_READY(9)
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NAME

6       scsi_test_unit_ready - test if unit is ready
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SYNOPSIS

9       int scsi_test_unit_ready(struct scsi_device * sdev, int timeout,
10                                int retries,
11                                struct scsi_sense_hdr * sshdr_external);
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ARGUMENTS

14       sdev
15           scsi device to change the state of.
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17       timeout
18           command timeout
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20       retries
21           number of retries before failing
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23       sshdr_external
24           Optional pointer to struct scsi_sense_hdr for returning sense. Make
25           sure that this is cleared before passing in.
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DESCRIPTION

28       Returns zero if unsuccessful or an error if TUR failed. For removable
29       media, a return of NOT_READY or UNIT_ATTENTION is translated to
30       success, with the ->changed flag updated.
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AUTHORS

33       James Bottomley <James.Bottomley@hansenpartnership.com>
34           Author.
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36       Rob Landley <rob@landley.net>
37           Author.
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40Kernel Hackers Manual 2.6.         June 2019           SCSI_TEST_UNIT_READY(9)
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