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nfp: fix RSS hash key size when RSS is not supported

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[ Upstream commit 8425161ac1204d2185e0a10f5ae652bae75d2451 ]

The nfp_net_get_rxfh_key_size() function returns -EOPNOTSUPP when
devices don't support RSS, and callers treat the negative value as a
large positive value since the return type is u32.

Return 0 when devices don't support RSS, aligning with the ethtool
interface .get_rxfh_key_size() that requires returning 0 in such cases.

Fixes: 9ff304bfaf ("nfp: add support for reporting CRC32 hash function")
Signed-off-by: Kohei Enju <enjuk@amazon.com>
Link: https://patch.msgid.link/20250929054230.68120-1-enjuk@amazon.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Kohei Enju 2025-09-29 14:42:15 +09:00 • committed by Greg Kroah-Hartman
commit 21f7d60a89
1 changed files with 1 additions and 1 deletions
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2
drivers/net/ethernet/netronome/nfp/nfp_net_ethtool.c
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@ -914,7 +914,7 @@ static u32 nfp_net_get_rxfh_key_size(struct net_device *netdev)
struct nfp_net *nn = netdev_priv(netdev);
if (!(nn->cap & NFP_NET_CFG_CTRL_RSS_ANY))
return -EOPNOTSUPP;
return 0;
return nfp_net_rss_key_sz(nn);
}