Re: [PATCH 0/4] net: stmmac: L3/L4 filter fixes and improvements

[Andrew Lunn]

On Wed, Jun 03, 2026 at 12:29:21AM -0700, muhammad.nazim.amirul.nazle.asmade@xxxxxxxxxx wrote:
> From: Nazim Amirul <muhammad.nazim.amirul.nazle.asmade@xxxxxxxxxx>
> 
> This series addresses several issues in the stmmac L3/L4 TC flower filter
> implementation for the XGMAC2 core.
> 
> Patch 1 fixes a register corruption bug in the L4 filter port configuration.
> The XGMAC_L4_ADDR register holds both source and destination port match
> values in a single register. The original code overwrites the entire register
> when setting either field, silently erasing the other. This is fixed by
> using a read-modify-write sequence.
> 
> Patch 2 fixes the basic flow match parser to properly reject unsupported
> offload requests with -EOPNOTSUPP instead of silently accepting them.
> Unsupported cases include partial protocol masks, non-IPv4 network proto,
> and non-TCP/UDP transport proto.
> 
> Patch 3 fixes a stale action bug on filter deletion. When a filter entry
> with a drop action is deleted, the action field was not reset, causing
> it to persist and potentially affect subsequent filter configurations.

Please base these on net.

https://www.kernel.org/doc/html/latest/process/maintainer-netdev.html

> 
> Patch 4 adds L3/L4 filter match counting to the ethtool statistics by
> reading the L3FM and L4FM bits from the RX descriptor status word (RDES2),
> allowing users to observe filter hit rates via ethtool -S.

and this one on net-next.

    Andrew

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