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There are at least two cases where napi_id may not present and the napi_id should be elided: 1. Queues could be created, but napi_enable may not have been called yet. In this case, there may be a NAPI but it may not have an ID and output of a napi_id should be elided. 2. TX-only NAPIs currently do not have NAPI IDs. If a TX queue happens to be linked with a TX-only NAPI, elide the NAPI ID from the netlink output as a NAPI ID of 0 is not useful for users. Signed-off-by: Joe Damato <jdamato@fastly.com> Reviewed-by: Sridhar Samudrala <sridhar.samudrala@intel.com> Reviewed-by: Eric Dumazet <edumazet@google.com> Link: https://patch.msgid.link/20250205193751.297211-1-jdamato@fastly.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>