Merge remote-tracking branch 'remotes/dgibson/tags/ppc-for-2.6-20160423' into staging

ppc patch queue for 2016-03-23

A single fix for a bug in parameter handling for the spapr PCI host
bridge.

# gpg: Signature made Sat 23 Apr 2016 07:55:29 BST using RSA key ID 20D9B392
# gpg: Good signature from "David Gibson <david@gibson.dropbear.id.au>"
# gpg:                 aka "David Gibson (Red Hat) <dgibson@redhat.com>"
# gpg:                 aka "David Gibson (ozlabs.org) <dgibson@ozlabs.org>"
# gpg: WARNING: This key is not certified with sufficiently trusted signatures!
# gpg:          It is not certain that the signature belongs to the owner.
# Primary key fingerprint: 75F4 6586 AE61 A66C C44E  87DC 6C38 CACA 20D9 B392

* remotes/dgibson/tags/ppc-for-2.6-20160423:
  hw/ppc/spapr: Fix crash when specifying bad parameters to spapr-pci-host-bridge
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>

hw/ppc/spapr.c

@@ -940,11 +940,10 @@ static void spapr_finalize_fdt(sPAPRMachineState *spapr,
 
     QLIST_FOREACH(phb, &spapr->phbs, list) {
         ret = spapr_populate_pci_dt(phb, PHANDLE_XICP, fdt);
-    }
-
-    if (ret < 0) {
-        fprintf(stderr, "couldn't setup PCI devices in fdt\n");
-        exit(1);
+        if (ret < 0) {
+            error_report("couldn't setup PCI devices in fdt");
+            exit(1);
+        }
     }
 
     /* RTAS */

hw/ppc/spapr_pci.c

@@ -1816,6 +1816,9 @@ int spapr_populate_pci_dt(sPAPRPHBState *phb,
                      sizeof(interrupt_map)));
 
     tcet = spapr_tce_find_by_liobn(SPAPR_PCI_LIOBN(phb->index, 0));
+    if (!tcet) {
+        return -1;
+    }
     spapr_dma_dt(fdt, bus_off, "ibm,dma-window",
                  tcet->liobn, tcet->bus_offset,
                  tcet->nb_table << tcet->page_shift);