Re: [PATCH net v2] octeontx2-af: skip NPC_AF_MATCH_STATX access on cn20k

[Nicolai Buchwitz]

Hi Vadluri

On 3.11.2026 10:18, Vadluri Mukunda wrote:
> From: Subbaraya Sundeep <sbhatta@xxxxxxxxxxx>
>
> NPC_AF_MATCH_STATX is not present on cn20k silicon, and cn20k does
> not set up an RX miss action counter. Two paths still access it:
> the npc_delete_flow mailbox, which reads the counter of the deleted
> rule, and the rx_miss_act_stats debugfs file, which would read
> counter 0. Avoid the access on cn20k. Counter support for cn20k is
> left for later.
>
> Found by code inspection. The issue was not triggered on hardware.
> Compile tested only; not tested on real hardware.

What does the read do on cn20k, fault or just return garbage? If it
is only the latter, with the recent discussion about routing
non-critical fixes through net-next, this looks like net-next
material to me?

> Fixes: 4e527f1e5c15 ("octeontx2-af: npc: cn20k: Add new mailboxes for 
> CN20K silicon")
> Signed-off-by: Subbaraya Sundeep <sbhatta@xxxxxxxxxxx>
> Signed-off-by: Vadluri Mukunda <vmukunda@xxxxxxxxxxx>
> ---

> [...]

Reviewed-by: Nicolai Buchwitz <nb@xxxxxxxxxxx>

Thanks,
Nicolai