diff --git a/drivers/infiniband/hw/mthca/mthca_provider.c b/drivers/infiniband/hw/mthca/mthca_provider.c
index 293c69b1e48f..55a338da9970 100644
--- a/drivers/infiniband/hw/mthca/mthca_provider.c
+++ b/drivers/infiniband/hw/mthca/mthca_provider.c
@@ -568,8 +568,9 @@ static struct ib_mr *mthca_reg_phys_mr(struct ib_pd       *pd,
 
 static int mthca_dereg_mr(struct ib_mr *mr)
 {
-	mthca_free_mr(to_mdev(mr->device), to_mmr(mr));
-	kfree(mr);
+	struct mthca_mr *mmr = to_mmr(mr);
+	mthca_free_mr(to_mdev(mr->device), mmr);
+	kfree(mmr);
 	return 0;
 }