mlx4_core: Error message on mtt allocation failure

Add error message if mlx4_mtt_init fails to allocate mtts.

Signed-off-by: Marcel Apfelbaum <[email protected]>
Reviewed-by: Jack Morgenstein <[email protected]>
Signed-off-by: Vladimir Sokolovsky <[email protected]>
(Ported from Mellanox OFED 2.4)

Signed-off-by: Mukesh Kacker <[email protected]>

Orabug: 27510506

(cherry picked from commit bd2177d)
cherry-pick-repo=linux-uek.git

Signed-off-by: Qing Huang <[email protected]>
Signed-off-by: Aron Silverton <[email protected]>
Signed-off-by: Somasundaram Krishnasamy <[email protected]>

Author: Marcel Apfelbaum

drivers/net/ethernet/mellanox/mlx4/mr.c

@@ -207,8 +207,11 @@ int mlx4_mtt_init(struct mlx4_dev *dev, int npages, int page_shift,
 		++mtt->order;
 
 	mtt->offset = mlx4_alloc_mtt_range(dev, mtt->order);
-	if (mtt->offset == -1)
+	if (mtt->offset == -1) {
+		mlx4_err(dev, "Failed to allocate mtts for %d pages(order %d)\n",
+			 npages, mtt->order);
 		return -ENOMEM;
+	}
 
 	return 0;
 }