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| author | Jason Andryuk <jandryuk@gmail.com> | 2018-02-28 07:23:23 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-04-24 09:32:06 +0200 |
| commit | 4c65e94eb476b8e7d806d7e36ca1f5f789e9804a (patch) | |
| tree | c5c7756efb02d7e8fb227e6639899185812dcd13 /drivers/powercap | |
| parent | 318a306c53d17fa333d888d29c45268c6a8b1783 (diff) | |
xen-netfront: Fix hang on device removal
commit c2d2e6738a209f0f9dffa2dc8e7292fc45360d61 upstream.
A toolstack may delete the vif frontend and backend xenstore entries
while xen-netfront is in the removal code path. In that case, the
checks for xenbus_read_driver_state would return XenbusStateUnknown, and
xennet_remove would hang indefinitely. This hang prevents system
shutdown.
xennet_remove must be able to handle XenbusStateUnknown, and
netback_changed must also wake up the wake_queue for that state as well.
Fixes: 5b5971df3bc2 ("xen-netfront: remove warning when unloading module")
Signed-off-by: Jason Andryuk <jandryuk@gmail.com>
Cc: Eduardo Otubo <otubo@redhat.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Signed-off-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/powercap')
0 files changed, 0 insertions, 0 deletions