[ Upstream commit b58e3d4311b54b6dd0e37165277965da0c9eb21d ] This could race if the queue is redirected while full, then the flushing internally would start it while it's not yet usable again. Fix it by using two state bits instead of just one. Reviewed-by: Benjamin Berg <benjamin.berg@intel.com> Tested-by: Jose Ignacio Tornos Martinez <jtornosm@redhat.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Sasha Levin <sashal@kernel.org>