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-rw-r--r--arch/powerpc/kernel/eeh.c2
-rw-r--r--arch/powerpc/kernel/eeh_driver.c27
-rw-r--r--arch/powerpc/kernel/prom.c18
3 files changed, 33 insertions, 14 deletions
diff --git a/arch/powerpc/kernel/eeh.c b/arch/powerpc/kernel/eeh.c
index 893978c980da..40e4d4a27663 100644
--- a/arch/powerpc/kernel/eeh.c
+++ b/arch/powerpc/kernel/eeh.c
@@ -631,7 +631,7 @@ int eeh_pci_enable(struct eeh_pe *pe, int function)
*/
switch (function) {
case EEH_OPT_THAW_MMIO:
- active_flag = EEH_STATE_MMIO_ACTIVE;
+ active_flag = EEH_STATE_MMIO_ACTIVE | EEH_STATE_MMIO_ENABLED;
break;
case EEH_OPT_THAW_DMA:
active_flag = EEH_STATE_DMA_ACTIVE;
diff --git a/arch/powerpc/kernel/eeh_driver.c b/arch/powerpc/kernel/eeh_driver.c
index 89eb4bc34d3a..80dfe8965df9 100644
--- a/arch/powerpc/kernel/eeh_driver.c
+++ b/arch/powerpc/kernel/eeh_driver.c
@@ -416,7 +416,10 @@ static void *eeh_rmv_device(void *data, void *userdata)
driver = eeh_pcid_get(dev);
if (driver) {
eeh_pcid_put(dev);
- if (driver->err_handler)
+ if (driver->err_handler &&
+ driver->err_handler->error_detected &&
+ driver->err_handler->slot_reset &&
+ driver->err_handler->resume)
return NULL;
}
@@ -587,10 +590,16 @@ static int eeh_reset_device(struct eeh_pe *pe, struct pci_bus *bus)
eeh_ops->configure_bridge(pe);
eeh_pe_restore_bars(pe);
- /* Clear frozen state */
- rc = eeh_clear_pe_frozen_state(pe, false);
- if (rc)
- return rc;
+ /*
+ * If it's PHB PE, the frozen state on all available PEs should have
+ * been cleared by the PHB reset. Otherwise, we unfreeze the PE and its
+ * child PEs because they might be in frozen state.
+ */
+ if (!(pe->type & EEH_PE_PHB)) {
+ rc = eeh_clear_pe_frozen_state(pe, false);
+ if (rc)
+ return rc;
+ }
/* Give the system 5 seconds to finish running the user-space
* hotplug shutdown scripts, e.g. ifdown for ethernet. Yes,
@@ -655,9 +664,17 @@ static void eeh_handle_normal_event(struct eeh_pe *pe)
* to accomplish the reset. Each child gets a report of the
* status ... if any child can't handle the reset, then the entire
* slot is dlpar removed and added.
+ *
+ * When the PHB is fenced, we have to issue a reset to recover from
+ * the error. Override the result if necessary to have partially
+ * hotplug for this case.
*/
pr_info("EEH: Notify device drivers to shutdown\n");
eeh_pe_dev_traverse(pe, eeh_report_error, &result);
+ if ((pe->type & EEH_PE_PHB) &&
+ result != PCI_ERS_RESULT_NONE &&
+ result != PCI_ERS_RESULT_NEED_RESET)
+ result = PCI_ERS_RESULT_NEED_RESET;
/* Get the current PCI slot state. This can take a long time,
* sometimes over 300 seconds for certain systems.
diff --git a/arch/powerpc/kernel/prom.c b/arch/powerpc/kernel/prom.c
index bef76c5033e4..7030b035905d 100644
--- a/arch/powerpc/kernel/prom.c
+++ b/arch/powerpc/kernel/prom.c
@@ -783,17 +783,19 @@ void __init early_get_first_memblock_info(void *params, phys_addr_t *size)
int of_get_ibm_chip_id(struct device_node *np)
{
of_node_get(np);
- while(np) {
- struct device_node *old = np;
- const __be32 *prop;
+ while (np) {
+ u32 chip_id;
- prop = of_get_property(np, "ibm,chip-id", NULL);
- if (prop) {
+ /*
+ * Skiboot may produce memory nodes that contain more than one
+ * cell in chip-id, we only read the first one here.
+ */
+ if (!of_property_read_u32(np, "ibm,chip-id", &chip_id)) {
of_node_put(np);
- return be32_to_cpup(prop);
+ return chip_id;
}
- np = of_get_parent(np);
- of_node_put(old);
+
+ np = of_get_next_parent(np);
}
return -1;
}
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