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13 June 2022, 11:31:42 UTC
Revision c2d2e6738a209f0f9dffa2dc8e7292fc45360d61 authored by Jason Andryuk on 28 February 2018, 12:23:23 UTC, committed by Juergen Gross on 28 February 2018, 19:20:08 UTC 
xen-netfront: Fix hang on device removal
 
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>
1 parent 910f8be
History
Tip revision: c2d2e6738a209f0f9dffa2dc8e7292fc45360d61 authored by Jason Andryuk on 28 February 2018, 12:23:23 UTC
xen-netfront: Fix hang on device removal
Tip revision: c2d2e67
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