rk_iommu_is_stall_active
if (rk_iommu_is_stall_active(iommu))
ret = readx_poll_timeout(rk_iommu_is_stall_active, iommu, val,
if (!rk_iommu_is_stall_active(iommu))
ret = readx_poll_timeout(rk_iommu_is_stall_active, iommu, val,