Re: [Linuxptp-devel] Debugging ptp4l

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

On Thu, May 30, 2013 at 6:59 PM, Drasko DRASKOVIC
<dra...@gm...> wrote:
> 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)
> ...

Sorry, seems like I did not take correct uImage that corresponds new
module. I did now, and module was loaded fine.

Anyway, do you thing that the place (file and function) I inserted
skb_tx_timestamp(skb); is a good candidate ?

Best regards,
Drasko