tree e3bc29f241716265548140ef3b6f6fed016b6537
parent e3538c37ee383228cb9f89fb9312c417f5eb3bfc
author Soren Brinkmann <soren.brinkmann@xilinx.com> 1451126630 -0800
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1454827929 -0800

tty: xuartps: Use spinlock to serialize HW access

Instead of disabling the IRQ, use the spin lock to serialize accesses to
the HW. This protects the driver from interference of non-IRQ callbacks
with each other and makes the driver more consistent in its
serialization method.

Signed-off-by: Soren Brinkmann <soren.brinkmann@xilinx.com>
Reviewed-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>