RE: [PATCH] drivers: net: gianfar: Shortest frame drops at Ethernet port

[Claudiu Manoil]

>-----Original Message-----
>From: Daniel Walker <danielwa@xxxxxxxxx>
>Sent: Wednesday, November 6, 2019 7:03 PM
>To: Claudiu Manoil <claudiu.manoil@xxxxxxx>
>Cc: Sathish Jarugumalli <sjarugum@xxxxxxxxx>; xe-linux-external@xxxxxxxxx;
>Daniel Walker <dwalker@xxxxxxxxxx>; David S. Miller
><davem@xxxxxxxxxxxxx>; netdev@xxxxxxxxxxxxxxx; linux-
>kernel@xxxxxxxxxxxxxxx
>Subject: [PATCH] drivers: net: gianfar: Shortest frame drops at Ethernet port
>
>NXP has provided the patch for packet drops  at ethernet port
>Frames shorter than 60bytes are getting dropped at ethernetport
>need to add padding for the shorter range frames to be transmit
>the function "eth_skb_pad(skb" provides padding (and CRC) for
>packets under 60 bytes
>
>Signed-off-by: Sathish Jarugumalli <sjarugum@xxxxxxxxx>
>Cc: xe-linux-external@xxxxxxxxx
>Signed-off-by: Daniel Walker <dwalker@xxxxxxxxxx>

Signed-off-by: Claudiu Manoil <claudiu.manoil@xxxxxxx>

Normally padding is done by the hardware, and it works at least on my
test cases and boards.
But cisco seems to have hit a case where h/w padding gets
unexpectedly disabled (concurrency issue writing the config register?).
This patch should go as a workaround, until root cause found.

-Claudiu