w1 - fix fops in w1_bus_notify
authorHans-Frieder Vogt <hfvogt@gmx.net>
Sun, 6 Oct 2013 19:13:35 +0000 (21:13 +0200)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Mon, 7 Oct 2013 07:12:14 +0000 (00:12 -0700)
commit2962aecef2878e2192ac9676700469678507c24d
tree93070b11c0b9d5a3321478beb1b8645f4d12df24
parent15c03dd4859ab16f9212238f29dd315654aa94f6
w1 - fix fops in w1_bus_notify

Introduce a check to make sure that fops are only called if they have
been defined by the slave module.

Without this check modules like w1_smem cause a NULL pointer dereference
bug.

Signed-off by: Hans-Frieder Vogt <hfvogt@gmx.net>
Acked-by: Evgeniy Polyakov <zbr@ioremap.net>
Cc: stable <stable@vger.kernel.org> # 3.11+
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/w1/w1.c