[PATCH 3.19.y-ckt 073/196] serial: omap: Prevent DoS using unprivileged ioctl(TIOCSRS485)

3.19.8-ckt16 -stable review patch. If anyone has any objections, please let me know. ---8< From: Peter Hurley commit 308bbc9ab838d0ace0298268c7970ba9513e2c65 upstream. The omap-serial driver emulates RS485

[PATCH 3.19.y-ckt 073/196] serial: omap: Prevent DoS using unprivileged ioctl(TIOCSRS485)

3.19.8-ckt16 -stable review patch. If anyone has any objections, please let me know. ---8< From: Peter Hurley commit 308bbc9ab838d0ace0298268c7970ba9513e2c65 upstream. The omap-serial driver emulates RS485 delays using software