Re: [PATCH net v2] net: sunhme: Fix packet reception for len < RX_COPY_THRESHOLD
From: patchwork-bot+netdevbpf
Date: Thu Sep 22 2022 - 10:10:38 EST
Hello:
This patch was applied to netdev/net.git (master)
by Jakub Kicinski <kuba@xxxxxxxxxx>:
On Tue, 20 Sep 2022 19:50:18 -0400 you wrote:
> There is a separate receive path for small packets (under 256 bytes).
> Instead of allocating a new dma-capable skb to be used for the next packet,
> this path allocates a skb and copies the data into it (reusing the existing
> sbk for the next packet). There are two bytes of junk data at the beginning
> of every packet. I believe these are inserted in order to allow aligned DMA
> and IP headers. We skip over them using skb_reserve. Before copying over
> the data, we must use a barrier to ensure we see the whole packet. The
> current code only synchronizes len bytes, starting from the beginning of
> the packet, including the junk bytes. However, this leaves off the final
> two bytes in the packet. Synchronize the whole packet.
>
> [...]
Here is the summary with links:
- [net,v2] net: sunhme: Fix packet reception for len < RX_COPY_THRESHOLD
https://git.kernel.org/netdev/net/c/878e2405710a
You are awesome, thank you!
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