droid dna otg?

Hi.
I have cyanogenmod 12.1 on my droid dna (dlx).but i can't use usb flash by otg cable..device can't mount otg device anymore.
my otg cable is ok.
please help me..is there any kernel or kernel patch to able droid dna to mount otg?
please
HTC6435LVW
Cyanogenmod version:12.1-20150901-SNAPSHOT-YOG4PAO236-dlx
Android version:5.1.1
Kernel version:3.4.10-CM-g5bf8101