1 files changed, 9 insertions, 1 deletions

diff --git a/arch/powerpc/kernel/eeh.c b/arch/powerpc/kernel/eeh.c
index 98949b0df00a..6696c1986844 100644
--- a/arch/powerpc/kernel/eeh.c
+++ b/arch/powerpc/kernel/eeh.c
@@ -304,9 +304,17 @@ void eeh_slot_error_detail(struct eeh_pe *pe, int severity)
          *
          * For pHyp, we have to enable IO for log retrieval. Otherwise,
          * 0xFF's is always returned from PCI config space.
+         *
+         * When the @severity is EEH_LOG_PERM, the PE is going to be
+         * removed. Prior to that, the drivers for devices included in
+         * the PE will be closed. The drivers rely on working IO path
+         * to bring the devices to quiet state. Otherwise, PCI traffic
+         * from those devices after they are removed is like to cause
+         * another unexpected EEH error.
          */
         if (!(pe->type & EEH_PE_PHB)) {
-                if (eeh_has_flag(EEH_ENABLE_IO_FOR_LOG))
+                if (eeh_has_flag(EEH_ENABLE_IO_FOR_LOG) ||
+                    severity == EEH_LOG_PERM)
                         eeh_pci_enable(pe, EEH_OPT_THAW_MMIO);
 
                 /*