in case there is no tap device the script tries to
generate a new one.
The new device is then unguarded for a moment, so
the newly generated device could be acquired
by a different instance or user, before it is locked to
the instance with acquire_taplock.
To fix that keep generating new tap devices in case
the lock can't be acquired up to 5 times.
If no tap device can be locked it fails in the existing
error handling
(From OE-Core rev: ae4e4fb703f63402cacbef772e70082e5760f78a)
Signed-off-by: Konrad Weihmann <kweihmann@outlook.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
(cherry picked from commit 23876576d054ebbab9b02c0012782aa56feda123)
Signed-off-by: Steve Sakoman <steve@sakoman.com>
a335a496d2