for i in /sys/bus/usb/devices/*/power/autosuspend_delay_ms;
    do echo -1 > $i;
done
for foo in /sys/bus/usb/devices/*/power/control;
    do echo on > $foo;
done

/sys/devices/pci0000:00/0000:00:14.0/usb2/2-1/power/usb3_hardware_lpm_u1
/sys/devices/pci0000:00/0000:00:14.0/usb2/2-1/power/usb3_hardware_lpm_u2
/sys/devices/pci0000:00/0000:00:14.0/usb2/2-2/power/usb3_hardware_lpm_u1
/sys/devices/pci0000:00/0000:00:14.0/usb2/2-2/power/usb3_hardware_lpm_u2
/sys/devices/pci0000:00/0000:00:14.0/usb2/2-3/power/usb3_hardware_lpm_u1
/sys/devices/pci0000:00/0000:00:14.0/usb2/2-3/power/usb3_hardware_lpm_u2
/sys/devices/pci0000:00/0000:00:14.0/usb2/2-4/power/usb3_hardware_lpm_u1
/sys/devices/pci0000:00/0000:00:14.0/usb2/2-4/power/usb3_hardware_lpm_u2
/sys/devices/pci0000:00/0000:00:14.0/usb2/power/usb3_hardware_lpm_u1
/sys/devices/pci0000:00/0000:00:14.0/usb2/power/usb3_hardware_lpm_u2

# lsusb
Bus 002 Device 009: ID 05dc:a838 Lexar Media, Inc.
Bus 002 Device 006: ID 05dc:a838 Lexar Media, Inc.
Bus 002 Device 010: ID 05dc:a838 Lexar Media, Inc.
Bus 002 Device 008: ID 05dc:a838 Lexar Media, Inc.
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 003: ID 0cf3:311e Atheros Communications, Inc.
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

# uname -a
Linux FileserverA112 4.4.0-31-generic #50-Ubuntu SMP Wed Jul 13 00:07:12 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux