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From 33cca921994d30abfb03ce0f681c6fc58f5c0703 Mon Sep 17 00:00:00 2001
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From: Lennart Poettering <lennart@poettering.net>
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Date: Fri, 24 Apr 2015 17:28:06 +0200
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Subject: [PATCH] unit: don't add automatic dependencies on device units if
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 they aren't supported
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http://lists.freedesktop.org/archives/systemd-devel/2015-April/031187.html
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(cherry picked from commit 47bc12e1ba35d38edda737dae232088d6d3ae688)
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Cherry-picked from: c20cdaa
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Resolves: #1222517
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---
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 src/core/unit.c | 10 +++++++---
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 1 file changed, 7 insertions(+), 3 deletions(-)
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diff --git a/src/core/unit.c b/src/core/unit.c
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index 565455bd63..b9e1f13eaf 100644
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--- a/src/core/unit.c
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+++ b/src/core/unit.c
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@@ -2830,14 +2830,18 @@ int unit_add_node_link(Unit *u, const char *what, bool wants) {
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         assert(u);
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-        if (!what)
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-                return 0;
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-
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         /* Adds in links to the device node that this unit is based on */
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+        if (isempty(what))
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+                return 0;
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         if (!is_device_path(what))
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                 return 0;
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+        /* When device units aren't supported (such as in a
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+         * container), don't create dependencies on them. */
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+        if (unit_vtable[UNIT_DEVICE]->supported && !unit_vtable[UNIT_DEVICE]->supported(u->manager))
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+                return 0;
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+
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         e = unit_name_from_path(what, ".device");
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         if (!e)
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                 return -ENOMEM;