This firmware update fix a HFP issue on EHCI which was reported from Canonical OEM team. Please consider to pull the fix in Ubuntu 14.10.
http://git.kernel.org/cgit/linux/kernel/git/firmware/linux-firmware.git/commit/?id=13eb208681bf7cc7434189dd925e587d12707d50
This firmware update fix a HFP issue on EHCI which was reported from Canonical OEM team.
Please consider to pull the fix in Ubuntu 14.10.
http:// git.kernel. org/cgit/ linux/kernel/ git/firmware/ linux-firmware. git/commit/ ?id=13eb208681b f7cc7434189dd92 5e587d12707d50