2d91b7a0b0
The removal of "hotplug-status" has moved around a bit. First it was
moved from netback_remove() to hotplug_status_changed() in upstream
commit 1f2565780e9b ("xen-netback: remove 'hotplug-status' once it has
served its purpose"). Then the change was reverted in upstream commit
0f4558ae9187 ("Revert "xen-netback: remove 'hotplug-status' once it has
served its purpose""), but it moved the removal to backend_disconnect().
Then the upstream commit c55f34b6aec2 ("xen-netback: only remove
'hotplug-status' when the vif is actually destroyed") moved it finally
back to netback_remove(). The thing to note being it is removed
unconditionally this time around.
The story on v5.4.y adds to this confusion. Commit 60e4e3198ce8 ("Revert
"xen-netback: remove 'hotplug-status' once it has served its purpose"")
is backported to v5.4.y but the original commit that it tries to revert
was never present on 5.4. So the backport incorrectly ends up just
adding another xenbus_rm() of "hotplug-status" in backend_disconnect().
Now in v5.4.y it is removed in both backend_disconnect() and
netback_remove(). But it should only be removed in netback_remove(), as
the upstream version does.
Removing "hotplug-status" in backend_disconnect() causes problems when
the frontend unilaterally disconnects, as explained in
c55f34b6aec2 ("xen-netback: only remove 'hotplug-status' when the vif is
actually destroyed").
Remove "hotplug-status" in the same place as it is done on the upstream
version to ensure unilateral re-connection of frontend continues to
work.
Fixes: 60e4e3198ce8 ("Revert "xen-netback: remove 'hotplug-status' once it has served its purpose"")
Signed-off-by: Pratyush Yadav <ptyadav@amazon.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.