On Fri, 6 Feb 2026 17:31:54 +0530 Srujana Challa wrote:

Replace hardcoded RSS max key size limit with NETDEV_RSS_KEY_LEN to
align with kernel's standard RSS key length. Add validation for RSS
key size against spec minimum (40 bytes) and driver maximum. When
validation fails, gracefully disable RSS features and continue
initialization rather than failing completely.

Hm, FWIW clang says:

drivers/net/virtio_net.c:6841:31: warning: result of comparison of constant 256 with expression of type 'u8' (aka 'unsigned char') is always false [-Wtautological-constant-out-of-range-compare]
 6841 |                 } else if (vi->rss_key_size > VIRTIO_NET_RSS_MAX_KEY_SIZE) {
      |                            ~~~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~

Which is kinda annoying because the value was increased in net-next.
If Machael wants this backported then we need to keep the check
and follow up in net-next? We could try to cast the u32 away but
that feels dirty..