RE: [PATCH net v1] Revert "lan743x: trim all 4 bytes of the FCS; not just 2"

From: David Laight
Date: Fri Apr 09 2021 - 13:24:27 EST


From: Sven Van Asbroeck
> Sent: 08 April 2021 19:35
...
> - buffer_length = netdev->mtu + ETH_HLEN + 4 + RX_HEAD_PADDING;
> + buffer_length = netdev->mtu + ETH_HLEN + ETH_FCS_LEN + RX_HEAD_PADDING;

I'd try to write the lengths in the order they happen, so:
buffer_length = RX_HEAD_PADDING + ETH_HLEN + netdev->mtu + ETH_FCS_LEN;

The compiler should add all the constants together,
so the generated code ought to be the same.

David

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