Fail to recognize USB GADGET(MASS Storage)


HOST PC cant find the usb removable disk, after i execute the command.

sudo modprobe g_mass_storage file=/dev/mmcblk0p1

Here are the kernel version and dmesg.
Need help!

OS: Debian


[ 574.515398] Mass Storage Function, version: 2009/09/11
[ 574.515869] LUN: removable file: (no medium)
[ 574.516619] LUN: file: /dev/mmcblk0p1
[ 574.516960] Number of LUNs=1
[ 574.517534] g_mass_storage gadget: Mass Storage Gadget, version: 2009/09/11
[ 574.518166] g_mass_storage gadget: userspace failed to provide iSerialNumber
[ 574.518794] g_mass_storage gadget: g_mass_storage ready