netdev-genl: avoid empty messages in napi get

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[ Upstream commit 4a25201aa4 ]

Empty netlink responses from do() are not correct (as opposed to
dump() where not dumping anything is perfectly fine).
We should return an error if the target object does not exist,
in this case if the netdev is down we "hide" the NAPI instances.

Fixes: 27f91aaf49 ("netdev-genl: Add netlink framework functions for napi")
Reviewed-by: Eric Dumazet <edumazet@google.com>
Link: https://patch.msgid.link/20241219032833.1165433-1-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Jakub Kicinski 2024-12-18 19:28:32 -08:00 • committed by Greg Kroah-Hartman

parent 74f9e8f2e8

commit b983a01f58

1 changed files with 5 additions and 1 deletions

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net/core/netdev-genl.c

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