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SubjectRE: [PATCH] drivers: net: gianfar: Shortest frame drops at Ethernet port
Date
>-----Original Message-----
>From: Daniel Walker <danielwa@cisco.com>
>Sent: Wednesday, November 6, 2019 7:03 PM
>To: Claudiu Manoil <claudiu.manoil@nxp.com>
>Cc: Sathish Jarugumalli <sjarugum@cisco.com>; xe-linux-external@cisco.com;
>Daniel Walker <dwalker@fifo99.com>; David S. Miller
><davem@davemloft.net>; netdev@vger.kernel.org; linux-
>kernel@vger.kernel.org
>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@cisco.com>
>Cc: xe-linux-external@cisco.com
>Signed-off-by: Daniel Walker <dwalker@fifo99.com>

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

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

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