pc-bios/s390-ccw: fix for fragmented SCSI bootmap
We need to interpret the last entry of the bootmap with zero
block count as "continuation pointer".
The "last entry" is being detected by pre-filling of the scratch
space with known values and respective look-ahead.
Signed-off-by: Eugene (jno) Dvurechenski <[email protected]>
Signed-off-by: Jens Freimann <[email protected]>
Tested-by: Christian Borntraeger <[email protected]>
Reviewed-by: David Hildenbrand <[email protected]>
Reviewed-by: Cornelia Huck <[email protected]>
Reviewed-by: Alexander Graf <[email protected]>
Signed-off-by: Cornelia Huck <[email protected]>