Dear Richard,
i'm sorry for i need your help again, i just resolve the kernel crash,
this was caused by call spin_lock twice in stmmac mac driver, but another
problem come out.
when i run "./ptp4l -i eth0 -H -p /dev/ptp0 -m", an error display
"*increasing
tx_timestamp_timeout may correct this issue, but it is likely caused by a
driver bug*", i'm not sure this was caused by mac driver or phy driver.
and i run ptp4l in SOFTWARE mode, all goes correctlly.
2014-04-11 17:35 GMT+08:00 Arnold kang <arnold0k...@gmail.com>:
> Dear Richard,
> thanks your help
>
>
> 2014-04-11 17:26 GMT+08:00 Richard Cochran <richardcoch...@gmail.com>:
>
> On Fri, Apr 11, 2014 at 04:07:02PM +0800, Arnold kang wrote:
>> > Dear Richard,
>> > i get my kernel from my chip vendor， yes, the mac driver is modified
>> by
>> > them. maybe this is why the kernel crashed. but i really don't
>> understand
>> > what* skb_tx_timestamp() *mean. i search in google, there is no
>> answer，
>> > and there is no prototype in kernel or other use in kernel code. can you
>> > tell me how to add it? thanks...
>>
>> Regarding skb_tx_timestamp(), the prototype is found in
>> include/linux/skbuff.h, and it has been there since v2.6.36.
>>
>> * skb_tx_timestamp() - Driver hook for transmit timestamping
>> *
>> * Ethernet MAC Drivers should call this function in their hard_xmit()
>> * function immediately before giving the sk_buff to the MAC hardware.
>>
>> Once you fix your kernel crash, then you will need to add this into
>> the MAC driver as well.
>>
>> The kernel crash has nothing to do with skb_tx_timestamp().
>> Unfortunately, I cannot help you with your vendor kernel.
>>
>> Good luck,
>> Richard
>>
>
>
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