Merge tag 'usb-serial-3.18-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/johan/usb-serial

 into usb-linus

Johan writes:

USB-serial fixes for v3.18-rc4

Two fixes of non-atomic allocations in write paths.

Signed-off-by: Johan Hovold <johan@kernel.org>