powerpc/eeh: Trace PCI bus from PE

There're several types of PEs can be supported for now: PHB, Bus
and Device dependent PE. For PCI bus dependent PE, tracing the
corresponding PCI bus from PE (struct eeh_pe) would make the code
more efficient. The patch also enables the retrieval of PCI bus based
on the PCI bus dependent PE.

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

1 files changed, 1 insertions, 0 deletions

diff --git a/arch/powerpc/include/asm/eeh.h b/arch/powerpc/include/asm/eeh.h
index acdfcaaf5c36..f3b49d6d5259 100644
--- a/arch/powerpc/include/asm/eeh.h
+++ b/arch/powerpc/include/asm/eeh.h
@@ -59,6 +59,7 @@ struct eeh_pe {
         int config_addr;                /* Traditional PCI address      */
         int addr;                       /* PE configuration address     */
         struct pci_controller *phb;     /* Associated PHB               */
+        struct pci_bus *bus;            /* Top PCI bus for bus PE       */
         int check_count;                /* Times of ignored error       */
         int freeze_count;               /* Times of froze up            */
         int false_positives;            /* Times of reported #ff's      */