powerpc/powernv/pci: Check status of a PHB before using it

If the firmware encounters an error (internal or HW) during initialization
of a PHB, it might leave the device-node in the tree but mark it disabled
using the "status" property. We should check it.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

diff --git a/arch/powerpc/platforms/powernv/pci-ioda.c b/arch/powerpc/platforms/powernv/pci-ioda.c
index ed27f4cb28cac3822224f1ffff397a76279423c2..891fc4a453dfec36d7da386b4009e0b3cedac8f4 100644 (file)
--- a/arch/powerpc/platforms/powernv/pci-ioda.c
+++ b/arch/powerpc/platforms/powernv/pci-ioda.c
@@ -3516,6 +3516,9 @@ static void __init pnv_pci_init_ioda_phb(struct device_node *np,
        void *aux;
        long rc;
 
+       if (!of_device_is_available(np))
+               return;
+
        pr_info("Initializing %s PHB (%s)\n",
                pnv_phb_names[ioda_type], of_node_full_name(np));