The ATA convention is to return the capacity. The SCSI convention is to return the highest block number, one less than the capacity. So, the driver misses a -1.
Phew, I would have never found this. Congrats!
Another problem causing hangs was that the SCSI code does TEST_UNIT_READY, and datafab.c first wants to determine which lun it is using, and tries to find out, but the attempt fails and causes scsi error-recovery, but that does TEST_UNIT_READY and we have a recursion. Below a patch fixing both problems. Now my two-lun device works for CF and it works for SM but not both - depending on the order of the entries in unusual_devices.
Hmm, this patch does not work for me. If I don't insert a CF card in my CF reader insmod'ing usb-storage with sd-mod preloaded just causes insmod to hang. Did you try this?
greetings, eduard
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