diff --git a/drivers/iommu/arm/arm-smmu/arm-smmu.c b/drivers/iommu/arm/arm-smmu/arm-smmu.c
index b57536b024ac0c54d369c16d70d2703b317c73da..39cc38876d872fceebf1cbc967da9b9f09e6de51 100644
--- a/drivers/iommu/arm/arm-smmu/arm-smmu.c
+++ b/drivers/iommu/arm/arm-smmu/arm-smmu.c
@@ -1372,6 +1372,17 @@ static struct iommu_device *arm_smmu_probe_device(struct device *dev)
 			goto out_free;
 	} else if (fwspec && fwspec->ops == &arm_smmu_ops) {
 		smmu = arm_smmu_get_by_fwnode(fwspec->iommu_fwnode);
+
+		/*
+		 * Defer probe if the relevant SMMU instance hasn't finished
+		 * probing yet. This is a fragile hack and we'd ideally
+		 * avoid this race in the core code. Until that's ironed
+		 * out, however, this is the most pragmatic option on the
+		 * table.
+		 */
+		if (!smmu)
+			return ERR_PTR(dev_err_probe(dev, -EPROBE_DEFER,
+						"smmu dev has not bound yet\n"));
 	} else {
 		return ERR_PTR(-ENODEV);
 	}