linux - usb_modeswitch is hangs on manual switch -


i have 3.2.27 linux kernel busybox. using raspberry pi. when pluging huawei e303c dmesg showing 

[    4.569781] usb 1-1.2: new high-speed usb device number 5 using dwc_otg [    4.681078] usb 1-1.2: new usb device found, idvendor=12d1, idproduct=14fe [    4.690885] usb 1-1.2: new usb device strings: mfr=2, product=1, serialnumber=0 [    4.701143] usb 1-1.2: product: huawei mobile [    4.708326] usb 1-1.2: manufacturer: huawei [    4.718185] scsi0 : usb-storage 1-1.2:1.0 [    4.726518] scsi1 : usb-storage 1-1.2:1.1 [    5.720951] scsi 0:0:0:0: cd-rom            huawei   mass storage     2.31 pq: 0 ansi: 2 [    5.738561] scsi 1:0:0:0: direct-access     huawei   sd storage       2.31 pq: 0 ansi: 2 [    5.755514] sd 1:0:0:0: [sda] attached scsi removable disk

the option kernel module running usb-storage module not running. when enter usb_modeswitch -v 0x12d1 -p 0x14fe -h it's hangs 

looking default devices ...  found default devices (1) accessing device 002 on bus 002 ... using endpoints 0x04 (out) , 0x83 (in) inquiring device details; driver detached ... looking active driver ...  ok, driver found ("usb-storage")  ok, driver "usb-storage" detached

can give me solution,

this has solve issue 

usb_modeswitch -c /etc/usb_modeswitch.conf -w -i  modprobe option modprobe ppp_generic

my /etc/usb_modeswitch.conf looks like

# huawei e303c defaultvendor= 0x12d1 defaultproduct=0x14fe  targetvendor=  0x12d1 targetproductlist="1001,1406,140b,140c,1412,141b,14ac,1506"  checksuccess=20  messageendpoint= 0x01 messagecontent="55534243123456780000000000000011062000000100000000000000000000"

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