kernel panic/hang when testing driver port to Linux kernel 4.4

Hello.

Building the driver sources for/on Ubuntu 16.04 fails, for some changes in Linux kernel between 4.1 and 4.2. The change to compile it is as below. At face value the change appears to be a trivial change, but the system hangs (or kernel panics) when attempting to "start" the driver. Of kernel/module panic trace has "klemNetConnect" at the bottom.

What may be the change needed to make this work? What information can I gather more info to identify/isolate the problem?

Driver change diff I made is below:

828a829,832
> #define LINUX44_TEST_CHANGE
> #define LINUX44_TEST_CHANGE
>     *pTotalFlags &= (/* FIF_PROMISC_IN_BSS | */ FIF_ALLMULTI);
> #else
829a834
> #endif
1422a1428,1432
> #ifdef LINUX44_TEST_CHANGE
>     ieee80211_hw_set(pMacData->pHW, MFP_CAPABLE);
>     ieee80211_hw_set(pMacData->pHW, SIGNAL_DBM);
>     ieee80211_hw_set(pMacData->pHW, AMPDU_AGGREGATION);
> #else
1430a1441
> #endif

The commands that seem to execute ok are:

modprobe mac80211
modprobe cfg80211
insmod klem.ko
echo “device = eth0” > /proc/klem

The start command that hangs the system is: echo “command = start” > /proc/klem

The dmesg output is:

[ 1121.794988] cfg80211: World regulatory domain updated: [ 1121.794992] cfg80211: DFS Master region: unset [ 1121.794993] cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time) [ 1121.794995] cfg80211: (2402000 KHz - 2472000 KHz @ 40000 KHz), (N/A, 2000 mBm), (N/A) [ 1121.794996] cfg80211: (2457000 KHz - 2482000 KHz @ 40000 KHz), (N/A, 2000 mBm), (N/A) [ 1121.794997] cfg80211: (2474000 KHz - 2494000 KHz @ 20000 KHz), (N/A, 2000 mBm), (N/A) [ 1121.794999] cfg80211: (5170000 KHz - 5250000 KHz @ 80000 KHz, 160000 KHz AUTO), (N/A, 2000 mBm), (N/A) [ 1121.795000] cfg80211: (5250000 KHz - 5330000 KHz @ 80000 KHz, 160000 KHz AUTO), (N/A, 2000 mBm), (0 s) [ 1121.795002] cfg80211: (5490000 KHz - 5730000 KHz @ 160000 KHz), (N/A, 2000 mBm), (0 s) [ 1121.795003] cfg80211: (5735000 KHz - 5835000 KHz @ 80000 KHz), (N/A, 2000 mBm), (N/A) [ 1121.795004] cfg80211: (57240000 KHz - 63720000 KHz @ 2160000 KHz), (N/A, 0 mBm), (N/A) [ 1121.806393] klem: module verification failed: signature and/or required key missing - tainting kernel [ 1121.806971] klem::klemDataInit malloc internal data at ffff8800d9050000 [ 1121.807021] klem::privKLEMInit Module sucessfully installed

Contentes of /proc/klem after "device = eth0" are:

cat /proc/klem KLEM Proc Interface

Version: 1 raw-device: eth0 raw-socket: null netlink: null device-id: 0 device-id: lemu filter:

stuartwells4 / klem

kernel panic/hang when testing driver port to Linux kernel 4.4 #1