powerpc/eeh: EEH post initialization operation

The patch adds new EEH operation post_init. It's used to notify
the platform that EEH core has completed the EEH probe. By that,
PowerNV platform starts to use the services supplied by EEH
functionality.

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

1 files changed, 11 insertions, 0 deletions

diff --git a/arch/powerpc/kernel/eeh.c b/arch/powerpc/kernel/eeh.c
index c865c5f54b18..a29cf473fadf 100644
--- a/arch/powerpc/kernel/eeh.c
+++ b/arch/powerpc/kernel/eeh.c
@@ -720,6 +720,17 @@ int __init eeh_init(void)
                 return -EINVAL;
         }
 
+        /*
+         * Call platform post-initialization. Actually, It's good chance
+         * to inform platform that EEH is ready to supply service if the
+         * I/O cache stuff has been built up.
+         */
+        if (eeh_ops->post_init) {
+                ret = eeh_ops->post_init();
+                if (ret)
+                        return ret;
+        }
+
         if (eeh_subsystem_enabled)
                 pr_info("EEH: PCI Enhanced I/O Error Handling Enabled\n");
         else