Revert "powerpc/pci: Remove unused struct pci_dn.pcidev field"

This commit removed the pcidev field from struct pci_dn as it was no
longer in use by the kernel. However to support finding the
association of Nvlink devices to GPU devices from the device-tree this
field is required.

This reverts commit 250c7b277c65 ("powerpc/pci: Remove unused struct
pci_dn.pcidev field").

Signed-off-by: Alistair Popple <alistair@popple.id.au>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

2 files changed, 2 insertions, 0 deletions

diff --git a/arch/powerpc/include/asm/pci-bridge.h b/arch/powerpc/include/asm/pci-bridge.h
index 37fc53587bb4..54843ca5fa2b 100644
--- a/arch/powerpc/include/asm/pci-bridge.h
+++ b/arch/powerpc/include/asm/pci-bridge.h
@@ -205,6 +205,7 @@ struct pci_dn {
 
         int     pci_ext_config_space;   /* for pci devices */
 
+        struct  pci_dev *pcidev;        /* back-pointer to the pci device */
 #ifdef CONFIG_EEH
         struct eeh_dev *edev;           /* eeh device */
 #endif
diff --git a/arch/powerpc/platforms/powernv/pci-ioda.c b/arch/powerpc/platforms/powernv/pci-ioda.c
index 272f6566d790..258ece5c0a8f 100644
--- a/arch/powerpc/platforms/powernv/pci-ioda.c
+++ b/arch/powerpc/platforms/powernv/pci-ioda.c
@@ -1008,6 +1008,7 @@ static void pnv_ioda_setup_same_PE(struct pci_bus *bus, struct pnv_ioda_pe *pe)
                                 pci_name(dev));
                         continue;
                 }
+                pdn->pcidev = dev;
                 pdn->pe_number = pe->pe_number;
                 pe->dma_weight += pnv_ioda_dma_weight(dev);
                 if ((pe->flags & PNV_IODA_PE_BUS_ALL) && dev->subordinate)