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When validating an XTS key, the 2 key parts are validated separately. This can happen on different crypto cards, when more than one crypto card is available to the system. Each key part can be validated on a different card, however, the 2 cards need to have the same master key, thus the master key validation pattern contained in the 2 key parts are checked. Signed-off-by: Ingo Franzki <ifranzki@linux.vnet.ibm.com> Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>