SONY DSC doesn't work via usb [regression]

Hi, All.

I tried to attach my Sony DSC-W50 camera to 8.0-BETA2 and it
doesn't work.
First of i got following dmesg:

ugen3.2: <Sony> at usbus3 (disconnected)
umass0: at uhub3, port 4, addr 2 (disconnected)
(da0:umass-sim0:0:0:0): lost device
(da0:umass-sim0:0:0:0): removing device entry
ugen3.2: <Sony> at usbus3
umass0: <Sony Sony DSC, class 0/0, rev 2.00/6.00, addr 2> on usbus3
umass0:  RBC over CBI; quirks = 0x1000
umass0:1:0:-1: Attached to scbus1
da0 at umass-sim0 bus 0 target 0 lun 0
da0: <Sony Sony DSC 6.00> Removable Direct Access SCSI-0 device
da0: 40.000MB/s transfers
da0: 980MB (2007040 512 byte sectors: 64H 32S/T 980C)
(da0:umass-sim0:0:0:0): Synchronize cache failed, status == 0x4, scsi 
status == 0x0

And da0 device sometime doesn't appear, but sometime appears.
When I try to get access to da0 i'm getting I/O error:

# mount_msdosfs -m 0664 -M 0775 /dev/da0 /mnt/
mount_msdosfs: /dev/da0: Input/output error

So, I tried to add NO_SYNCHRONIZE_CACHE to quirks list in umass.c
But it didn't resolve the problem.

ugen3.2: <Sony> at usbus3
umass0: <Sony Sony DSC, class 0/0, rev 2.00/6.00, addr 2> on usbus3
umass0:  RBC over CBI; quirks = 0x5000
umass0:1:0:-1: Attached to scbus1
da0 at umass-sim0 bus 0 target 0 lun 0
da0: <Sony Sony DSC 6.00> Removable Direct Access SCSI-0 device
da0: 40.000MB/s transfers
da0: 980MB (2007040 512 byte sectors: 64H 32S/T 980C)

da0 device didn't appear. It seems the problem is not in USB code.
Any suggestions?

--
WBR, Andrey V. Elsukov