On 1/30/2013 8:13 AM, Vikram Narayanan wrote:

On 1/30/2013 12:16 AM, Troy Kisky wrote:

quoted

I have fixed this bug (and more) on Freescale's kernel
(imx-3.0.35_1.1.0). I created a branch you can try.
Feel free to port to mainline.

Thanks a lot for the branch. I saw a lot of differences between
your driver and the mainline. I should spend some time If I had
to port this to mainline.
  

quoted

This is the patch that should fix your problem
fec: clear TX_FULL in fec_restart


Please let me know results.

When NAPI is disabled I saw a severe packet loss
(around 40% in a flood ping) which spitted out this,

[  470.390928] net eth0: missed rxf 2000000 1c000000 0
[  470.419098] net eth0: missed rxf 2000000 1c000000 0
[  470.443800] net eth0: missed rxf 2000000 1c000000 0
[  470.450315] net eth0: missed rxf 2000000 1c000000 0

When NAPI is enabled, it was working good. Though it
resulted in the same error, it recovered by itself,
which is perfectly fine for me. :)

You'll also have better performance if you pass "enable_wait_mode=off" 
in bootargs.