powerpc/eeh: sysfs entries lost

The sysfs entries are lost because of commit 2213fb1 ("powerpc/eeh:
Skip eeh sysfs when eeh is disabled"). That commit added condition
to create sysfs entries with EEH_ENABLED, which isn't populated
when trying to create sysfs entries on PowerNV platform during system
boot time. The patch fixes the issue by:

   * Reoder EEH initialization functions so that they're same on
     PowerNV/pSeries.
   * Cache PE's primary bus by PowerNV platform instead of EEH core
     to avoid kernel crash caused by the function reorder. Another
     benefit with this is to avoid one eeh_probe_mode_dev() in EEH
     core.

Signed-off-by: Mike Qiu <qiudayu@linux.vnet.ibm.com>
Acked-by: Gavin Shan <gwshan@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

1 files changed, 0 insertions, 11 deletions

diff --git a/arch/powerpc/kernel/eeh_pe.c b/arch/powerpc/kernel/eeh_pe.c
index fbd01eba4473..1dce071a9ac3 100644
--- a/arch/powerpc/kernel/eeh_pe.c
+++ b/arch/powerpc/kernel/eeh_pe.c
@@ -351,17 +351,6 @@ int eeh_add_to_parent_pe(struct eeh_dev *edev)
         pe->config_addr = edev->config_addr;
 
         /*
-         * While doing PE reset, we probably hot-reset the
-         * upstream bridge. However, the PCI devices including
-         * the associated EEH devices might be removed when EEH
-         * core is doing recovery. So that won't safe to retrieve
-         * the bridge through downstream EEH device. We have to
-         * trace the parent PCI bus, then the upstream bridge.
-         */
-        if (eeh_probe_mode_dev())
-                pe->bus = eeh_dev_to_pci_dev(edev)->bus;
-
-        /*
          * Put the new EEH PE into hierarchy tree. If the parent
          * can't be found, the newly created PE will be attached
          * to PHB directly. Otherwise, we have to associate the