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addons: bridge: add "None" check (string) for unsupported bridge attr on some systems

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Signed-off-by: Julien Fortin <julien@cumulusnetworks.com>
This commit is contained in:
Julien Fortin
2018-11-14 21:52:45 +01:00
parent 06dd888a28
commit 2229ca6371
1 changed files with 1 additions and 1 deletions
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ifupdown2/addons/bridge.py
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@@ -1249,7 +1249,7 @@ class bridge(moduleBase):
old_cache_key = self._ifla_br_attributes_old_cache_key_map.get(nl_attr)
if old_cache_key and not link_just_created:
cached_value = self.brctlcmd.link_cache_get([ifname, 'linkinfo', old_cache_key])
if not cached_value:
if not cached_value or cached_value == "None":
# the link already exists but we don't have any value
# cached for this attr, it probably means that the
# capability is not available on this system (i.e old kernel)