** Changed in: linux (Ubuntu Xenial)
Status: In Progress => Fix Committed
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https://bugs.launchpad.net/bugs/1785739
Title:
[Regression] APM Merlin boards fail to recover link after interface
down/up
Status in linux package in Ubuntu:
Fix Released
Status in linux source package in Xenial:
Fix Committed
Status in linux source package in Bionic:
Fix Released
Status in linux source package in Cosmic:
Fix Released
Bug description:
[Impact]
On an APM Merlin (X-Gene2) board, the onboard 1G interface fails to
re-establish link when the interface is brought down and back up. Juju + MAAS
provider does this after every install (so to configure a bridge), making this
config unusable.
This was actually a regression introduced by the fix for LP: #1632739
in 4.4.0-48.69.
[Test Case]
1) From a remote system, start a ping to the IP address of the Merlin board's
eth0 interface.
2) On the merlin board: sudo ifconfig eth0 down; sudo ifconfig eth0 up
3) Ping should recover, but doesn't
[Fix]
commit 84a527a41f38a80353f185d05e41b021e1ff672b
Author: Shaohui Xie <shaohui....@nxp.com>
Date: Tue May 10 17:42:26 2016 +0800
net: phylib: fix interrupts re-enablement in phy_start
[Regression Risk]
The fix appears to be straightforward - don't enable interrupts on a phy that
does not have a valid interrupt. Fixes are upstream, so any regressions should
get upstream support for fixing.
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