powerpc/powernv: Enable EEH for PHB3

The EEH isn't enabled for PHB3 and the patch intends to enable it.
Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

arch/powerpc/platforms/powernv/eeh-ioda.c

@@ -106,14 +106,11 @@ static int ioda_eeh_post_init(struct pci_controller *hose)
 		ioda_eeh_nb_init = 1;
 	}
 
-	/* FIXME: Enable it for PHB3 later */
-	if (phb->type == PNV_PHB_IODA1) {
+	/* We needn't HUB diag-data on PHB3 */
+	if (phb->type == PNV_PHB_IODA1 && !hub_diag) {
+		hub_diag = (char *)__get_free_page(GFP_KERNEL | __GFP_ZERO);
 		if (!hub_diag) {
-			hub_diag = (char *)__get_free_page(GFP_KERNEL |
-							   __GFP_ZERO);
-			if (!hub_diag) {
-				pr_err("%s: Out of memory !\n",
-				       __func__);
+			pr_err("%s: Out of memory !\n", __func__);
 			return -ENOMEM;
 		}
 	}
@@ -126,7 +123,6 @@ static int ioda_eeh_post_init(struct pci_controller *hose)
 #endif
 
 	phb->eeh_state |= PNV_EEH_STATE_ENABLED;
-	}
 
 	return 0;
 }

arch/powerpc/platforms/powernv/eeh-powernv.c

@@ -144,10 +144,7 @@ static int powernv_eeh_dev_probe(struct pci_dev *dev, void *flag)
 	/*
 	 * Enable EEH explicitly so that we will do EEH check
 	 * while accessing I/O stuff
-	 *
-	 * FIXME: Enable that for PHB3 later
 	 */
-	if (phb->type == PNV_PHB_IODA1)
 	eeh_subsystem_enabled = 1;
 
 	/* Save memory bars */