From 216076705d6ac291d42e0f8dd85e6a0da98c0fa3 Mon Sep 17 00:00:00 2001
From: Mike Snitzer <snitzer@redhat.com>
Date: Tue, 8 Sep 2015 08:56:13 -0400
Subject: [PATCH] dm thin: disable discard support for thin devices if pool's
 is disabled

If the pool is configured with 'ignore_discard' its discard support is
disabled.  The pool's thin devices should also have queue_limits that
reflect discards are disabled.

Fixes: 34fbcf62 ("dm thin: range discard support")
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Cc: stable@vger.kernel.org # 4.1+
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