diff --git a/drivers/infiniband/ulp/iser/iscsi_iser.h b/drivers/infiniband/ulp/iser/iscsi_iser.h
index dee8c97ff056..d967d5532459 100644
--- a/drivers/infiniband/ulp/iser/iscsi_iser.h
+++ b/drivers/infiniband/ulp/iser/iscsi_iser.h
@@ -317,12 +317,10 @@ struct iser_device {
  *
  * @mr:         memory region
  * @sig_mr:     signature memory region
- * @mr_valid:   is mr valid indicator
  */
 struct iser_reg_resources {
 	struct ib_mr                     *mr;
 	struct ib_mr                     *sig_mr;
-	u8				  mr_valid:1;
 };
 
 /**
diff --git a/drivers/infiniband/ulp/iser/iser_initiator.c b/drivers/infiniband/ulp/iser/iser_initiator.c
index 7b83f48f60c5..8ec470c519e8 100644
--- a/drivers/infiniband/ulp/iser/iser_initiator.c
+++ b/drivers/infiniband/ulp/iser/iser_initiator.c
@@ -580,7 +580,10 @@ static inline int iser_inv_desc(struct iser_fr_desc *desc, u32 rkey)
 		return -EINVAL;
 	}
 
-	desc->rsc.mr_valid = 0;
+	if (desc->sig_protected)
+		desc->rsc.sig_mr->need_inval = false;
+	else
+		desc->rsc.mr->need_inval = false;
 
 	return 0;
 }
diff --git a/drivers/infiniband/ulp/iser/iser_memory.c b/drivers/infiniband/ulp/iser/iser_memory.c
index 29ae2c6a250a..6efcb79c8efe 100644
--- a/drivers/infiniband/ulp/iser/iser_memory.c
+++ b/drivers/infiniband/ulp/iser/iser_memory.c
@@ -264,7 +264,7 @@ static int iser_reg_sig_mr(struct iscsi_iser_task *iser_task,
 
 	iser_set_prot_checks(iser_task->sc, &sig_attrs->check_mask);
 
-	if (rsc->mr_valid)
+	if (rsc->sig_mr->need_inval)
 		iser_inv_rkey(&tx_desc->inv_wr, mr, cqe, &wr->wr);
 
 	ib_update_fast_reg_key(mr, ib_inc_rkey(mr->rkey));
@@ -288,7 +288,7 @@ static int iser_reg_sig_mr(struct iscsi_iser_task *iser_task,
 	wr->access = IB_ACCESS_LOCAL_WRITE |
 		     IB_ACCESS_REMOTE_READ |
 		     IB_ACCESS_REMOTE_WRITE;
-	rsc->mr_valid = 1;
+	rsc->sig_mr->need_inval = true;
 
 	sig_reg->sge.lkey = mr->lkey;
 	sig_reg->rkey = mr->rkey;
@@ -313,7 +313,7 @@ static int iser_fast_reg_mr(struct iscsi_iser_task *iser_task,
 	struct ib_reg_wr *wr = &tx_desc->reg_wr;
 	int n;
 
-	if (rsc->mr_valid)
+	if (rsc->mr->need_inval)
 		iser_inv_rkey(&tx_desc->inv_wr, mr, cqe, &wr->wr);
 
 	ib_update_fast_reg_key(mr, ib_inc_rkey(mr->rkey));
@@ -336,7 +336,7 @@ static int iser_fast_reg_mr(struct iscsi_iser_task *iser_task,
 		     IB_ACCESS_REMOTE_WRITE |
 		     IB_ACCESS_REMOTE_READ;
 
-	rsc->mr_valid = 1;
+	rsc->mr->need_inval = true;
 
 	reg->sge.lkey = mr->lkey;
 	reg->rkey = mr->rkey;
diff --git a/drivers/infiniband/ulp/iser/iser_verbs.c b/drivers/infiniband/ulp/iser/iser_verbs.c
index a00ca117303a..057e69164e6d 100644
--- a/drivers/infiniband/ulp/iser/iser_verbs.c
+++ b/drivers/infiniband/ulp/iser/iser_verbs.c
@@ -135,7 +135,6 @@ iser_create_fastreg_desc(struct iser_device *device,
 			goto err_alloc_mr_integrity;
 		}
 	}
-	desc->rsc.mr_valid = 0;
 
 	return desc;