Add check for sharedio on reseat

Reseat returns success even when it
is not performed.  Check for
shared io blocking prior to actually
attempting.  This allows us to catch an error the firmware should have.

Change-Id: I683382236c0dc0683eba69d36e726056782aab10

pyghmi/ipmi/oem/lenovo/nextscale.py

@@ -683,8 +683,23 @@ class SMMClient(object):
             rsp.read()
 
     def reseat_bay(self, bay):
+        bay = int(bay)
+        if bay % 2 == 0:
+            # even node may be unable to reseat based on shared io
+            try:
+                rsp = self.ipmicmd.xraw_command(0x32, 0xc5, data=[1])
+            except Exception:
+                rsp = {'data': [1]}
+            rsp['data'] = bytearray(rsp['data'])
+            if rsp['data'][0] == 2:  # shared io
+                rsp = self.ipmicmd.xraw_command(0x32, 0xa7, data=[bay - 1])
+                rsp['data'] = bytearray(rsp['data'])
+                if rsp['data'][1] == 0x80:
+                    raise Exception('Unable to reseat bay {0} due to bay {1} '
+                                    'being on with shared IO'.format(
+                                        bay, bay - 1))
         self.ipmicmd.xraw_command(netfn=0x32, command=0xa4,
-                                  data=[int(bay), 2])
+                                  data=[bay, 2])
 
     def get_diagnostic_data(self, savefile, progress=None, autosuffix=False,
                             variant=None):