problem with mobile phone

[Alexander Best]

hi there,

when i connect my mobile phone to a recent HEAD (amd64; r211393) i get the following:

ugen3.3: <Samsung> at usbus3
umass0: <USB Mass Storage Interface> on usbus3
(probe0:umass-sim0:0:0:0): TEST UNIT READY. CDB: 0 0 0 0 0 0 
(probe0:umass-sim0:0:0:0): CAM status: SCSI Status Error
(probe0:umass-sim0:0:0:0): SCSI status: Check Condition
(probe0:umass-sim0:0:0:0): SCSI sense: UNIT ATTENTION asc:28,0 (Not ready to ready change, medium may have changed)
da0 at umass-sim0 bus 0 scbus9 target 0 lun 0
da0: <Samsung SGH-i550 1.0> Removable Direct Access SCSI-0 device 
da0: 40.000MB/s transfers
da0: 3777MB (7736320 512 byte sectors: 255H 63S/T 481C)

when i try to read stuff from the phone, it resets and i get this:

ugen3.3: <Samsung> at usbus3 (disconnected)
umass0: at uhub8, port 3, addr 3 (disconnected)
(da0:umass-sim0:0:0:0): AutoSense failed
(da0:umass-sim0:0:0:0): Synchronize cache failed, status == 0xa, scsi status == 0x0
(da0:umass-sim0:0:0:0): lost device
(da0:umass-sim0:0:0:0): removing device entry

it both happens if i mount it and read files or if i directly read something
from the /dev/da0 device using `dd`.

interestingly it always crashes after the same ammount of data read:

dd: /dev/da0: Input/output error
4+0 records in
4+0 records out
4194304 bytes transferred in 3.333149 secs (1258361 bytes/sec)

after a few retries the usb port i was using becomes unusable and nothing is
being detected any longer.

i'm pretty sure this didn't happen a few weeks ago, but now it does.

cheers.
alex

-- 
a13x