Re: Latest net-next kernel 4.19.0+

[Eric Dumazet]

On 10/29/2018 11:09 PM, Dimitris Michailidis wrote:

> 
> Indeed this is a bug. I would expect it to produce frequent errors
> though as many odd-length
> packets would trigger it. Do you have RXFCS? Regardless, how
> frequently do you see the problem?
> 

Old kernels (before 88078d98d1bb) were simply resetting ip_summed to 
CHECKSUM_NONE

And before your fix (commit d55bef5059dd057bd), mlx5 bug was canceling the bug 
you fixed.

So we now need to also fix mlx5.

And of course use skb_header_pointer() in mlx5e_get_fcs() as I mentioned 
earlier,
plus __get_unaligned_cpu32() as you hinted.