[Intel-wired-lan] [e1000e] Linux 4.9: unable to send packets after link recovery with patched driver

[Gavin Lambert]

On 2019-07-18 20:24, Neftin, Sasha wrote:
> Please, refer to the commit def4ec6dce393e2136b62a05712f35a7fa5f5e56
> on the Jeff Kirsher's next-queue:
> https://git.kernel.org/pub/scm/linux/kernel/git/jkirsher/next-queue.git/commit/drivers/net/ethernet/intel/e1000e?id=def4ec6dce393e2136b62a05712f35a7fa5f5e56
> 
> We are working to push this patch to upstream.

Thanks, that does sound identical to my symptoms.

However I tried applying this patch to my driver in 4.9 and it does not 
resolve the problem.

Are some additional patches required as well?


FWIW, I added some extra logging around the new code.  I can confirm 
that it does execute on link regain but doesn't actually enter the loop 
in my problem case.  The pcim_state is 0x00080083 at the time.  So the 
e1000_phy_hw_reset is never actually called.  If I try changing it to 
call that unconditionally, then it can't successfully establish a link 
in the first place.