usb device not recognised

[Wojciech Puchar]

> When the TL-C300 is plugged in after boot, it produces the following console report:-
>
> umass1: <RockChip ROCK MP3, class 0/0, rev 2.00/0.00, addr 2> on uhub2
> (probe0:umass-sim1:1:0:0): TEST UNIT READY. CDB: 0 0 0 0 0 0
> (probe0:umass-sim1:1:0:0): CAM Status: SCSI Status Error
> (probe0:umass-sim1:1:0:0): SCSI Status: Check Condition
> (probe0:umass-sim1:1:0:0): NOT READY asc:3a,0
> (probe0:umass-sim1:1:0:0): Medium not present
> (probe0:umass-sim1:1:0:0): Unretryable error
> da0 at umass-sim1 bus 1 target 0 lun 0
> da0: <Teclast Digital  Player 1.00> Removable Direct Access SCSI-0 device
> da0: 40.000MB/s transfers
> da0: 1900MB (3892224 512 byte sectors: 255H 63S/T 242C)
>

doesn't look like too big blocksize problem...

> but fails to create /dev/da0. Also, when it is plugged in, no other usb devices are recognised.
>
> Unplugging produces this:-
>
> umass1: at uhub2 port 2 (addr 2) disconnected
> (da0:umass-sim1:1:0:0): Synchronize cache failed, status == 0x39, scsi status == 0x0
> (da0:umass-sim1:1:0:0): lost device
> (da0:umass-sim1:1:0:0): removing device entry
> umass1: detached

If it's "Synchronize cache failed" problem, then adding entry in umass.c 
will fix it, as with my olympus FE-20

But it's rather not main problem. maybe some other quirk?
look at possible quirks