Am 10.01.2011 09:27, schrieb Barry Myles:

I'm using the linux-dect code and experimenting with dectmon and the libdect examples. Mostly, I think they are working well. I have a com-on-air type II card and it's in an aging P4 laptop. However, I'm having some kernel stability problems. The machine runs stabily forever before the card is configured with the netlink utilities. However, once the card is configured then a few minutes later the kernel will oops.

I'm configuring the card something like: dect-cluster-add --name cluster0 --emc 0xABCD --fpn 0x12345 --mode PP dect-cell-add --name cell0 --cluster cluster0 --flags monitor dect-transceiver-bind --transceiver trx0 --cell cell0

Until the kernel oops then everything seems to work fine and dectmon, for example will happily log what it sees.

I've attached two kernel logs which seem fairly typical of what is happening.

Can anyone help?

[ 120.118216] BUG: unable to handle kernel NULL pointer dereference at 000003d0 [ 120.119021] IP: [<c148faea>] _raw_spin_lock+0x15/0x27

This looks odd, apparently the transceiver group vanished. Could you send me your .config and the net/dect/transceiver.o files please?