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xen-scsiback: mark expected switch fall-through

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In preparation to enabling -Wimplicit-fallthrough, mark switch
cases where we are expecting to fall through.

This patch fixes the following warning:

drivers/xen/xen-scsiback.c: In function ‘scsiback_frontend_changed’:
drivers/xen/xen-scsiback.c:1185:6: warning: this statement may fall through [-Wimplicit-fallthrough=]
   if (xenbus_dev_is_online(dev))
      ^
drivers/xen/xen-scsiback.c:1188:2: note: here
  case XenbusStateUnknown:
  ^~~~

Warning level 3 was used: -Wimplicit-fallthrough=3

Notice that, in this particular case, the code comment is modified
in accordance with what GCC is expecting to find.

This patch is part of the ongoing efforts to enable
-Wimplicit-fallthrough.

Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Juergen Gross <jgross@suse.com>
This commit is contained in:
Gustavo A. R. Silva 2019-02-12 14:40:35 -06:00 committed by Juergen Gross
parent c9f19b67f0
commit efac6c75dc
1 changed files with 1 additions and 1 deletions
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2
drivers/xen/xen-scsiback.c
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@ -1184,7 +1184,7 @@ static void scsiback_frontend_changed(struct xenbus_device *dev,
xenbus_switch_state(dev, XenbusStateClosed);
if (xenbus_dev_is_online(dev))
break;
/* fall through if not online */
/* fall through - if not online */
case XenbusStateUnknown:
device_unregister(&dev->dev);
break;