powerpc/eeh: Remove eeh device from OF node

Originally, the PCI sensitive OF node is tracing the eeh device
through struct device_node->edev. However, it was regarded as
bad idea.

The patch removes struct device_node->edev and uses PCI_DN to
trace the corresponding eeh device according to BenH's comments.

Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

2 files changed, 9 insertions, 1 deletions

diff --git a/arch/powerpc/include/asm/pci-bridge.h b/arch/powerpc/include/asm/pci-bridge.h
index 5d487657322e..21f99aec41b9 100644
--- a/arch/powerpc/include/asm/pci-bridge.h
+++ b/arch/powerpc/include/asm/pci-bridge.h
@@ -155,6 +155,7 @@ struct pci_dn {
 
         struct  pci_dev *pcidev;        /* back-pointer to the pci device */
 #ifdef CONFIG_EEH
+        struct eeh_dev *edev;           /* eeh device */
         int     class_code;             /* pci device class */
         int     eeh_mode;               /* See eeh.h for possible EEH_MODEs */
         int     eeh_config_addr;
@@ -185,6 +186,13 @@ static inline int pci_device_from_OF_node(struct device_node *np,
         return 0;
 }
 
+#if defined(CONFIG_EEH)
+static inline struct eeh_dev *of_node_to_eeh_dev(struct device_node *dn)
+{
+        return PCI_DN(dn)->edev;
+}
+#endif
+
 /** Find the bus corresponding to the indicated device node */
 extern struct pci_bus *pcibios_find_pci_bus(struct device_node *dn);
 
diff --git a/arch/powerpc/platforms/pseries/eeh_dev.c b/arch/powerpc/platforms/pseries/eeh_dev.c
index f3aed7dcae95..c4507d095900 100644
--- a/arch/powerpc/platforms/pseries/eeh_dev.c
+++ b/arch/powerpc/platforms/pseries/eeh_dev.c
@@ -62,7 +62,7 @@ void * __devinit eeh_dev_init(struct device_node *dn, void *data)
         }
 
         /* Associate EEH device with OF node */
-        dn->edev  = edev;
+        PCI_DN(dn)->edev = edev;
         edev->dn  = dn;
         edev->phb = phb;