[stgt] [PATCH] UNMAP Change order of no-media and thin-provisioning tests

[ronnie sahlberg]

Tomo,

Please find attached a trivial patch to the UNMAP command.
It only changes in which order we perform two error checks.

Currently TGTD checks the UNMAP command using the sequence
1, if not-ThinProvisioned  then error
2, if NoMedia  then error


But since ThinProvisioning is more an attribute of the media itself
and not of the LUN/DiskDrive
it makes it more logical to do the checks in the reverse order for
LUNs that support BOTH removable media and thin-provisioning like this
:
1, if NoMedia then error
2, if not ThinProvisioned then error


regards
ronnie sahlberg
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