From 61cc74fbb87af6aa551a06a370590c9bc07e29d9 Mon Sep 17 00:00:00 2001
From: Louis Rilling <louis.rilling@kerlabs.com>
Date: Fri, 4 Dec 2009 14:52:41 +0100
Subject: [PATCH] block: Fix io_context leak after clone with CLONE_IO

With CLONE_IO, copy_io() increments both ioc->refcount and ioc->nr_tasks.
However exit_io_context() only decrements ioc->refcount if ioc->nr_tasks
reaches 0.

Always call put_io_context() in exit_io_context().

Signed-off-by: Louis Rilling <louis.rilling@kerlabs.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
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