For EEH on PowerNV platform, we will do EEH probe based on the
real PCI devices. The PCI devices are available after PCI probe.
So we have to call eeh_init() explicitly on PowerNV platform
after PCI probe. The patch also does EEH probe for PowerNV platform
in eeh_init().
Signed-off-by: Gavin Shan <sha...@linux.vnet.ibm.com>
---
arch/powerpc/include/asm/eeh.h | 6 ++++++
arch/powerpc/platforms/pseries/eeh.c | 23 +++++++++++++++++++++--
2 files changed, 27 insertions(+), 2 deletions(-)
diff --git a/arch/powerpc/include/asm/eeh.h b/arch/powerpc/include/asm/eeh.h
index 557d82a..1ff2aa9 100644
--- a/arch/powerpc/include/asm/eeh.h
+++ b/arch/powerpc/include/asm/eeh.h
@@ -199,6 +199,7 @@ void eeh_pci_dev_traverse(struct pci_bus *bus,
eeh_pci_traverse_func fn, void *flag);
void *eeh_dev_init(struct device_node *dn, void *data);
void eeh_dev_phb_init_dynamic(struct pci_controller *phb);
+int __init eeh_init(void);
int __init eeh_ops_register(struct eeh_ops *ops);
int __exit eeh_ops_unregister(const char *name);
unsigned long eeh_check_failure(const volatile void __iomem *token,
@@ -227,6 +228,11 @@ void eeh_remove_bus_device(struct pci_dev *, int);
#else /* !CONFIG_EEH */
+static inline int eeh_init(void)
+{
+ return 0;
+}
+
static inline void *eeh_dev_init(struct device_node *dn, void *data)
{
return NULL;
diff --git a/arch/powerpc/platforms/pseries/eeh.c
b/arch/powerpc/platforms/pseries/eeh.c
index 6b73d6c..abe26f8 100644
--- a/arch/powerpc/platforms/pseries/eeh.c
+++ b/arch/powerpc/platforms/pseries/eeh.c
@@ -674,11 +674,21 @@ int __exit eeh_ops_unregister(const char *name)
* Even if force-off is set, the EEH hardware is still enabled, so that
* newer systems can boot.
*/
-static int __init eeh_init(void)
+int __init eeh_init(void)
{
struct pci_controller *hose, *tmp;
struct device_node *phb;
- int ret;
+ static int cnt = 0;
+ int ret = 0;
+
+ /*
+ * We have to delay the initialization on PowerNV after
+ * the PCI hierarchy tree has been built because the PEs
+ * are figured out based on PCI devices instead of device
+ * tree nodes
+ */
+ if (machine_is(powernv) && cnt++ <= 0)
+ return ret;
/* call platform initialization function */
if (!eeh_ops) {
@@ -700,6 +710,15 @@ static int __init eeh_init(void)
phb = hose->dn;
traverse_pci_devices(phb, eeh_ops->of_probe, NULL);
}
+ } else if (eeh_probe_mode_dev()) {
+ list_for_each_entry_safe(hose, tmp,
+ &hose_list, list_node) {
+ eeh_pci_dev_traverse(hose->bus, eeh_ops->dev_probe,
NULL);
+ }
+ } else {
+ pr_warning("%s: Invalid probe mode %d\n",
+ __func__, eeh_probe_mode);
+ return -EINVAL;
}
if (eeh_subsystem_enabled)
--
1.7.5.4
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