partitions: add ->set_capacity block device method
* Add ->set_capacity block device method and use it in rescan_partitions() to attempt enabling native capacity of the device upon detecting the partition which exceeds device capacity. * Add GENHD_FL_NATIVE_CAPACITY flag to try limit attempts of enabling native capacity during partition scan. Together with the consecutive patch implementing ->set_capacity method in ide-gd device driver this allows automatic disabling of Host Protected Area (HPA) if any partitions overlapping HPA are detected. Cc: Robert Hancock <hancockrwd@gmail.com> Cc: Frans Pop <elendil@planet.nl> Cc: "Andries E. Brouwer" <Andries.Brouwer@cwi.nl> Acked-by: NAl Viro <viro@zeniv.linux.org.uk> Emphatically-Acked-by: NAlan Cox <alan@linux.intel.com> Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>
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