From: Herbert Xu Date: Tue, 31 Jul 2007 00:03:38 +0000 (-0700) Subject: [NET]: Allow netdev REGISTER/CHANGENAME events to fail X-Git-Tag: v2.6.23-rc2~35^2~23 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=fcc5a03ac42564e9e255c1134dda47442289e466;p=pandora-kernel.git [NET]: Allow netdev REGISTER/CHANGENAME events to fail This patch adds code to allow errors to be passed up from event handlers of NETDEV_REGISTER and NETDEV_CHANGENAME. It also adds the notifier_from_errno/notifier_to_errnor helpers to pass the errno value up to the notifier caller. If an error is detected when a device is registered, it causes that operation to fail. A NETDEV_UNREGISTER will be sent to all event handlers. Similarly if NETDEV_CHANGENAME fails the original name is restored and a new NETDEV_CHANGENAME event is sent. As such all event handlers must be idempotent with respect to these events. When an event handler is registered NETDEV_REGISTER events are sent for all devices currently registered. Should any of them fail, we will send NETDEV_GOING_DOWN/NETDEV_DOWN/NETDEV_UNREGISTER events to that handler for the devices which have already been registered with it. The handler registration itself will fail. Signed-off-by: Herbert Xu Signed-off-by: David S. Miller --- Reading git-diff-tree failed