powerpc/eeh_cache: Don't use pci_dn when inserting new ranges

At the point where we start inserting ranges into the EEH address cache the
binding between pci_dev and eeh_dev has already been set up. Instead of
consulting the pci_dn tree we can retrieve the eeh_dev directly using
pci_dev_to_eeh_dev().

Signed-off-by: Oliver O'Halloran <oohall@gmail.com>
Reviewed-by: Sam Bobroff <sbobroff@linux.ibm.com>
Tested-by: Sam Bobroff <sbobroff@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20190715085612.8802-2-oohall@gmail.com

diff --git a/arch/powerpc/kernel/eeh_cache.c b/arch/powerpc/kernel/eeh_cache.c
index cf11277..6b50bf1 100644 (file)
--- a/arch/powerpc/kernel/eeh_cache.c
+++ b/arch/powerpc/kernel/eeh_cache.c
@@ -159,18 +159,10 @@ eeh_addr_cache_insert(struct pci_dev *dev, resource_size_t alo,
 
 static void __eeh_addr_cache_insert_dev(struct pci_dev *dev)
 {
-       struct pci_dn *pdn;
        struct eeh_dev *edev;
        int i;
 
-       pdn = pci_get_pdn_by_devfn(dev->bus, dev->devfn);
-       if (!pdn) {
-               pr_warn("PCI: no pci dn found for dev=%s\n",
-                       pci_name(dev));
-               return;
-       }
-
-       edev = pdn_to_eeh_dev(pdn);
+       edev = pci_dev_to_eeh_dev(dev);
        if (!edev) {
                pr_warn("PCI: no EEH dev found for %s\n",
                        pci_name(dev));