[PATCH net v3] net: stmmac: fix oops when split header is enabled

[patchwork-bot+netdevbpf at kernel.org]

Hello:

This patch was applied to netdev/net.git (main)
by Jakub Kicinski <kuba at kernel.org>:

On Mon,  9 Feb 2026 17:50:32 -0500 you wrote:
> For GMAC4, when split header is enabled, in some rare cases, the
> hardware does not fill buf2 of the first descriptor with payload.
> Thus we cannot assume buf2 is always fully filled if it is not
> the last descriptor. Otherwise, the length of buf2 of the second
> descriptor will be calculated wrong and cause an oops:
> 
> Unable to handle kernel paging request at virtual address ffff00019246bfc0
> ...
> x2 : 0000000000000040 x1 : ffff00019246bfc0 x0 : ffff00009246c000
> Call trace:
>  dcache_inval_poc+0x28/0x58 (P)
>  dma_direct_sync_single_for_cpu+0x38/0x6c
>  __dma_sync_single_for_cpu+0x34/0x6c
>  stmmac_napi_poll_rx+0x8f0/0xb60
>  __napi_poll.constprop.0+0x30/0x144
>  net_rx_action+0x160/0x274
>  handle_softirqs+0x1b8/0x1fc
> ...
> 
> [...]

Here is the summary with links:
  - [net,v3] net: stmmac: fix oops when split header is enabled
    https://git.kernel.org/netdev/net/c/babab1b42ed6

You are awesome, thank you!
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