1 files changed, 13 insertions, 3 deletions

diff --git a/include/linux/ipmi_smi.h b/include/linux/ipmi_smi.h
index 53571288a9fc..6d9c7e4da472 100644
--- a/include/linux/ipmi_smi.h
+++ b/include/linux/ipmi_smi.h
@@ -82,6 +82,13 @@ struct ipmi_smi_handlers
 {
         struct module *owner;
 
+        /* The low-level interface cannot start sending messages to
+           the upper layer until this function is called.  This may
+           not be NULL, the lower layer must take the interface from
+           this call. */
+        int (*start_processing)(void       *send_info,
+                                ipmi_smi_t new_intf);
+
         /* Called to enqueue an SMI message to be sent.  This
            operation is not allowed to fail.  If an error occurs, it
            should report back the error in a received message.  It may
@@ -157,13 +164,16 @@ static inline void ipmi_demangle_device_id(unsigned char *data,
 }
 
 /* Add a low-level interface to the IPMI driver.  Note that if the
-   interface doesn't know its slave address, it should pass in zero. */
+   interface doesn't know its slave address, it should pass in zero.
+   The low-level interface should not deliver any messages to the
+   upper layer until the start_processing() function in the handlers
+   is called, and the lower layer must get the interface from that
+   call. */
 int ipmi_register_smi(struct ipmi_smi_handlers *handlers,
                       void                     *send_info,
                       struct ipmi_device_id    *device_id,
                       struct device            *dev,
-                      unsigned char            slave_addr,
-                      ipmi_smi_t               *intf);
+                      unsigned char            slave_addr);
 
 /*
  * Remove a low-level interface from the IPMI driver.  This will