Messages in this thread | | | Subject | Re: [Xen-devel] [PATCH] xen-netfront: Fix hang on device removal | From | Boris Ostrovsky <> | Date | Wed, 28 Feb 2018 10:21:07 -0500 |
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On 02/28/2018 07:23 AM, Jason Andryuk wrote: > 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>
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