When test hotplug, the timeout callback will set the attach callback
to NULL, so it will not add the drive back to hotplug tool automatically
sometimes.
Change-Id: I91a7c29059a7f680b2a0b7b79cf0a62c5638dcda
Signed-off-by: Changpeng Liu <changpeng.liu@intel.com>
Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/449519
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
4cfd17a7ce