In the case that the subsystem in the related poll group has
NULL IO channel assigned due to some problem like out of resource,
for example, the NVMe SSD hardware itself has limited number
of IO qpairs. The subsystems in the particular poll group
could have zero valid channels. In this case, the creation of
assoicated poll group will fail and when adding the new qpair
to the specified poll group, needs to have a check and pick the
available poll group.
Change-Id: Iedee2a6375e48eb7bf899cfb0542c565c7ebd231
Signed-off-by: GangCao <gang.cao@intel.com>
Reviewed-on: https://review.gerrithub.io/423646
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Chandler-Test-Pool: SPDK Automated Test System <sys_sgsw@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
98e119f7a9