From 6fb98fb3031359af42a6ee6984b477cbcfdca7bd Mon Sep 17 00:00:00 2001
From: Peter Hurley <peter@hurleysoftware.com>
Date: Fri, 31 Jul 2015 16:59:51 -0400
Subject: [PATCH] serial: core: Use proper spinlock flavor in uart_close()

uart_close() runs in non-atomic context only; use
spin_lock/unlock_irq instead of saving the interrupt state (which
== on).

Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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