FAILED: patch "[PATCH] IB/mlx5: Fix clean_mr() to work in the expected order" failed to apply to 4.9-stable tree

The patch below does not apply to the 4.9-stable tree.
If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <[email protected]>.

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From b9332dad987018745a0c0bb718d12dacfa760489 Mon Sep 17 00:00:00 2001
From: Yishai Hadas <[email protected]>
Date: Tue, 23 Jul 2019 09:57:28 +0300
Subject: [PATCH] IB/mlx5: Fix clean_mr() to work in the expected order

Any dma map underlying the MR should only be freed once the MR is fenced at the hardware.

As of the above we first destroy the MKEY and just after that can safely call to dma_unmap_single().

index 7274a9b9df58..2c77456f359f 100644
@@ -1582,10 +1582,10 @@ static void clean_mr(struct mlx5_ib_dev *dev, struct mlx5_ib_mr *mr)
 		mr->sig = NULL;
 	}
 
-	mlx5_free_priv_descs(mr);
-
-	if (!allocated_from_cache)
+	if (!allocated_from_cache) {
 		destroy_mkey(dev, mr);
+		mlx5_free_priv_descs(mr);
+	}
 }
 
 static void dereg_mr(struct mlx5_ib_dev *dev, struct mlx5_ib_mr *mr)