powerpc/powernv: Set correct configuration space size for opencapi devices

BugLink: http://bugs.launchpad.net/bugs/1746988
The configuration space for opencapi devices doesn't have a PCI
Express capability, therefore confusing linux in thinking it's of an
old PCI type with a 256-byte configuration space size, instead of the
desired 4k. So add a PCI fixup to declare the correct size.

Signed-off-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com>
Signed-off-by: Frederic Barrat <fbarrat@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
(cherry picked from commit 228c2f4103788ba2a8df636f383ec2df33b47b73)
Signed-off-by: Seth Forshee <seth.forshee@canonical.com>

diff --git a/arch/powerpc/platforms/powernv/pci-ioda.c b/arch/powerpc/platforms/powernv/pci-ioda.c
index e780263a14ee10fadc084bbc213881b4f74cdfa1..d5af700820f3c7022dd88ab8ab2dc5ddfae25ecc 100644 (file)
--- a/arch/powerpc/platforms/powernv/pci-ioda.c
+++ b/arch/powerpc/platforms/powernv/pci-ioda.c
@@ -4080,6 +4080,19 @@ void __init pnv_pci_init_npu2_opencapi_phb(struct device_node *np)
        pnv_pci_init_ioda_phb(np, 0, PNV_PHB_NPU_OCAPI);
 }
 
+static void pnv_npu2_opencapi_cfg_size_fixup(struct pci_dev *dev)
+{
+       struct pci_controller *hose = pci_bus_to_host(dev->bus);
+       struct pnv_phb *phb = hose->private_data;
+
+       if (!machine_is(powernv))
+               return;
+
+       if (phb->type == PNV_PHB_NPU_OCAPI)
+               dev->cfg_size = PCI_CFG_SPACE_EXP_SIZE;
+}
+DECLARE_PCI_FIXUP_EARLY(PCI_ANY_ID, PCI_ANY_ID, pnv_npu2_opencapi_cfg_size_fixup);
+
 void __init pnv_pci_init_ioda_hub(struct device_node *np)
 {
        struct device_node *phbn;