Re: [Linuxptp-devel] Debugging ptp4l

[Drasko D. <dra...@gm...>]

On Thu, May 30, 2013 at 5:59 PM, Richard Cochran
<ric...@gm...> wrote:
> On Thu, May 30, 2013 at 05:03:21PM +0200, Drasko DRASKOVIC wrote:
>>
>> I will grep for some examples, to see how it is currently done in the kernel.
>
> If tell me your MAC driver, I can suggest a likely place to call the
> tx time stamp function.

Hello Richard,
Pandaboard uses this WiFi driver :
https://github.com/garwedgess/ti-wlan/tree/master/compat-wireless-wl12xx/drivers/net/wireless/wl12xx

I put skb_tx_timestamp(skb); inside of wl1271_prepare_tx_frame() here
: https://github.com/garwedgess/ti-wlan/blob/master/compat-wireless-wl12xx/drivers/net/wireless/wl12xx/tx.c#L443.

It compiled, but I was unable to insert the module afterwards :

root@panda:~# modprobe wl12xx
FATAL: Error inserting wl12xx
(/lib/modules/3.2.40-dirty/kernel/drivers/net/wireless/wl12xx/wl12xx.ko):
Unknown symbol in module, or unknown parameter (see dmesg)
root@panda:~# dmesg
...
[   77.510345] wl12xx: Unknown symbol skb_clone_tx_timestamp (err 0)
...


Best regards,
Drasko