From 3e61696bdc2103107674b06d0daf30b76193e922 Mon Sep 17 00:00:00 2001
From: Alan Cox <alan@redhat.com>
Date: Fri, 2 Jan 2009 13:45:26 +0000
Subject: [PATCH] isicom: redo locking to use tty port locks

This helps set the basis for moving block_til_ready into common code. We also
introduce a tty_port_hangup helper as this will also be generally needed.

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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