tree 18cfcdc01b8074b58c1da246ed437d550663f6bc
parent 8a856397f1b023b53907d13e742c216d90dd5034
author Pavel Emelyanov <xemul@openvz.org> 1195084396 -0800
committer David S. Miller <davem@davemloft.net> 1195084396 -0800

[NET]: Remove notifier block from chain when register_netdevice_notifier fails

Commit fcc5a03ac42564e9e255c1134dda47442289e466:

	[NET]: Allow netdev REGISTER/CHANGENAME events to fail

makes the register_netdevice_notifier() handle the error from the
NETDEV_REGISTER event, sent to the registering block.

The bad news is that in this case the notifier block is 
not removed from the list, but the error is returned to the 
caller. In case the caller is in module init function and 
handles this error this can abort the module loading. The
notifier block will be then removed from the kernel, but 
will be left in the list. Oops :(

I think that the notifier block should be removed from the
chain in case of error, regardless whether this error is 
handled by the caller or not. In the worst case (the error 
is _not_ handled) module will not receive the events any 
longer.

Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>