lukma:/# dmesg
[3399512.500230] usb 1-6.1: new high speed USB device using ehci_hcd and address 30
[3399512.607226] usb 1-6.1: New USB device found, idVendor=0525, idProduct=a4a5
[3399512.607230] usb 1-6.1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[3399512.607232] usb 1-6.1: Product: File-backed Storage Gadget
[3399512.607234] usb 1-6.1: SerialNumber: 3230204E6F76
[3399512.607344] usb 1-6.1: configuration #1 chosen from 1 choice
[3399517.604069] usb 1-6.1: can't set config #1, error -110

TRATS # ums 0
Userspace failed to provide serial number; Failing back to default
bEndpoint 81 1 80
File-backed Storage Gadget, version: 20 November 2008
Number of LUNs=1
transport=Bulk-only (x50)
protocol=Transparent SCSI (x06)
VendorID=x0525, ProductID=xa4a5, Release=x0301
removable=1, stall=0, cdrom=0, buflen=16384
USB PHY0 Enable
handle running
/get device descriptor
-get device descriptor
get configuration descriptor
get configuration descriptor
get string descriptor
get string descriptor
get string descriptor
get string descriptor
set configuration
exiting main thread...
handle exception
old_state 4
set interface 0
ep0-control set halt
exiting main thread...
handle running