linux-kernel - [PATCH net-next 1/7] net: stmmac: Don't modify the global ptp ops directly

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Message-ID: <20241029115419.1160201-2-maxime.chevallier@bootlin.com>
Date: Tue, 29 Oct 2024 12:54:09 +0100
From: Maxime Chevallier <maxime.chevallier@...tlin.com>
To: Alexandre Torgue <alexandre.torgue@...s.st.com>,
	Jose Abreu <joabreu@...opsys.com>,
	Andrew Lunn <andrew+netdev@...n.ch>,
	davem@...emloft.net,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>,
	Maxime Coquelin <mcoquelin.stm32@...il.com>,
	Richard Cochran <richardcochran@...il.com>
Cc: Maxime Chevallier <maxime.chevallier@...tlin.com>,
	Alexis Lothoré <alexis.lothore@...tlin.com>,
	Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
	netdev@...r.kernel.org,
	linux-stm32@...md-mailman.stormreply.com,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH net-next 1/7] net: stmmac: Don't modify the global ptp ops directly

The stmmac_ptp_clock_ops are copied into the stmmac_priv structure
before being registered to the PTP core. Some adjustments are made prior
to that, such as the number of snapshots or max adjustment parameters.

Instead of modifying the global definition, then copying into the local
private data, let's first copy then modify the local parameters.

Signed-off-by: Maxime Chevallier <maxime.chevallier@...tlin.com>
---
 drivers/net/ethernet/stmicro/stmmac/stmmac_ptp.c | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_ptp.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_ptp.c
index a6b1de9a251d..11ab1d6b916a 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_ptp.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_ptp.c
@@ -298,20 +298,21 @@ void stmmac_ptp_register(struct stmmac_priv *priv)
 		priv->pps[i].available = true;
 	}
 
-	if (priv->plat->ptp_max_adj)
-		stmmac_ptp_clock_ops.max_adj = priv->plat->ptp_max_adj;
-
 	/* Calculate the clock domain crossing (CDC) error if necessary */
 	priv->plat->cdc_error_adj = 0;
 	if (priv->plat->has_gmac4 && priv->plat->clk_ptp_rate)
 		priv->plat->cdc_error_adj = (2 * NSEC_PER_SEC) / priv->plat->clk_ptp_rate;
 
-	stmmac_ptp_clock_ops.n_per_out = priv->dma_cap.pps_out_num;
-	stmmac_ptp_clock_ops.n_ext_ts = priv->dma_cap.aux_snapshot_n;
+	priv->ptp_clock_ops = stmmac_ptp_clock_ops;
+
+	priv->ptp_clock_ops.n_per_out = priv->dma_cap.pps_out_num;
+	priv->ptp_clock_ops.n_ext_ts = priv->dma_cap.aux_snapshot_n;
+
+	if (priv->plat->ptp_max_adj)
+		priv->ptp_clock_ops.max_adj = priv->plat->ptp_max_adj;
 
 	rwlock_init(&priv->ptp_lock);
 	mutex_init(&priv->aux_ts_lock);
-	priv->ptp_clock_ops = stmmac_ptp_clock_ops;
 
 	priv->ptp_clock = ptp_clock_register(&priv->ptp_clock_ops,
 					     priv->device);
-- 
2.47.0