[POWERPC] EEH: verify state change

After requesting a state change, verify that the state change
actually ocurred, and the system ends up in the expected state.

Signed-off-by: Linas Vepstas <linas@austin.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>

1 files changed, 5 insertions, 1 deletions

diff --git a/arch/powerpc/platforms/pseries/eeh.c b/arch/powerpc/platforms/pseries/eeh.c
index 1d05c9b55605..eac2a631c5a1 100644
--- a/arch/powerpc/platforms/pseries/eeh.c
+++ b/arch/powerpc/platforms/pseries/eeh.c
@@ -527,9 +527,13 @@ rtas_pci_enable(struct pci_dn *pdn, int function)
                             function);
 
         if (rc)
-                printk(KERN_WARNING "EEH: Cannot enable function %d, err=%d dn=%s\n",
+                printk(KERN_WARNING "EEH: Unexpected state change %d, err=%d dn=%s\n",
                         function, rc, pdn->node->full_name);
 
+        rc = eeh_wait_for_slot_status (pdn, PCI_BUS_RESET_WAIT_MSEC);
+        if ((rc == 4) && (function == EEH_THAW_MMIO))
+                return 0;
+
         return rc;
 }