tree d05a50ab4e0fadc1d119656b68c9cff0cbc307f4
parent 097933ddcd28ef99c116651b20fd2e06717e0f0d
author Tilman Schmidt <tilman@imap.cc> 1413027989 +0200
committer David S. Miller <davem@davemloft.net> 1413313533 -0400

isdn/gigaset: fix NULL pointer dereference

In do_action, a NULL pointer might be passed to function start_dial
which will dereference it.
Fix by adding a check for NULL before the call.

Spotted with Coverity.

Signed-off-by: Tilman Schmidt <tilman@imap.cc>
Signed-off-by: David S. Miller <davem@davemloft.net>