[dpdk-dev] [PATCH] net/af_xdp: set the max Rx pktlen value correctly

[Ferruh Yigit]

On 10/22/2021 3:07 PM, Ciara Loftus wrote:
> Commit 1bb4a528c41f ("ethdev: fix max Rx packet length") clarified the
> expected usage of the max_rx_pktlen and max_mtu values and implemented some
> extra checks on these values to ensure they are sane. After this,
> the AF_XDP PMD fails to initialise. The value for max_rx_pktlen which
> represents the max size of the Ethernet frame was set to ETH_FRAME_LEN
> (1514) and the max_mtu which represents the size of the payload was set to
> the max size of the Ethernet frame. This did not make sense, as naturally
> the maximum frame size should be greater than the payload size.
> 
> Fix this by setting the max_rx_pktlen equal to the max size of the
> Ethernet frame as expected, and the max MTU equal to the max_rx_pktlen
> less the overhead which is set to the size of an Ethernet header plus
> CRC.
> 
> Fixes: 1bb4a528c41f ("ethdev: fix max Rx packet length")
> 
> Signed-off-by: Ciara Loftus <ciara.loftus at intel.com>

Thanks for the fix.

Reviewed-by: Ferruh Yigit <ferruh.yigit at intel.com>

Applied to dpdk-next-net/main, thanks.