netdev - [PATCH iwl-net v1 3/3] ixgbe: use EOPNOTSUPP instead of ENOTSUPP in ixgbe_ptp_feature

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Message-ID: <20251006123741.43462-4-enjuk@amazon.com>
Date: Mon, 6 Oct 2025 21:35:23 +0900
From: Kohei Enju <enjuk@...zon.com>
To: <intel-wired-lan@...ts.osuosl.org>, <netdev@...r.kernel.org>
CC: Tony Nguyen <anthony.l.nguyen@...el.com>, Przemek Kitszel
	<przemyslaw.kitszel@...el.com>, Andrew Lunn <andrew+netdev@...n.ch>, "David
 S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, "Jakub
 Kicinski" <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, Auke Kok
	<auke-jan.h.kok@...el.com>, Jeff Garzik <jgarzik@...hat.com>, Sasha Neftin
	<sasha.neftin@...el.com>, Richard Cochran <richardcochran@...il.com>, "Jacob
 Keller" <jacob.e.keller@...el.com>, <kohei.enju@...il.com>, Kohei Enju
	<enjuk@...zon.com>
Subject: [PATCH iwl-net v1 3/3] ixgbe: use EOPNOTSUPP instead of ENOTSUPP in ixgbe_ptp_feature_enable()

When the requested PTP feature is not supported,
ixgbe_ptp_feature_enable() returns -ENOTSUPP, causing userland programs
to get "Unknown error 524".

Since EOPNOTSUPP should be used when error is propagated to userland,
return -EOPNOTSUPP instead of -ENOTSUPP.

Fixes: 3a6a4edaa592 ("ixgbe: Hardware Timestamping + PTP Hardware Clock (PHC)")
Signed-off-by: Kohei Enju <enjuk@...zon.com>
---
 drivers/net/ethernet/intel/ixgbe/ixgbe_ptp.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_ptp.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_ptp.c
index 114dd88fc71c..6885d2343c48 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_ptp.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_ptp.c
@@ -641,7 +641,7 @@ static int ixgbe_ptp_feature_enable(struct ptp_clock_info *ptp,
 	 * disabled
 	 */
 	if (rq->type != PTP_CLK_REQ_PPS || !adapter->ptp_setup_sdp)
-		return -ENOTSUPP;
+		return -EOPNOTSUPP;
 
 	if (on)
 		adapter->flags2 |= IXGBE_FLAG2_PTP_PPS_ENABLED;
-- 
2.48.1