netdev - [PATCH net-next v2 02/11] net: stmmac: disable PTP clock after unregistering PTP

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Message-Id: <E1uwfBO-00000004j8S-1MWr@rmk-PC.armlinux.org.uk>
Date: Thu, 11 Sep 2025 12:09:42 +0100
From: "Russell King (Oracle)" <rmk+kernel@...linux.org.uk>
To: Andrew Lunn <andrew@...n.ch>,
	Heiner Kallweit <hkallweit1@...il.com>
Cc: Alexandre Torgue <alexandre.torgue@...s.st.com>,
	Alexei Starovoitov <ast@...nel.org>,
	Andrew Lunn <andrew+netdev@...n.ch>,
	bpf@...r.kernel.org,
	Daniel Borkmann <daniel@...earbox.net>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Gatien CHEVALLIER <gatien.chevallier@...s.st.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Jesper Dangaard Brouer <hawk@...nel.org>,
	John Fastabend <john.fastabend@...il.com>,
	linux-arm-kernel@...ts.infradead.org,
	linux-stm32@...md-mailman.stormreply.com,
	Maxime Coquelin <mcoquelin.stm32@...il.com>,
	netdev@...r.kernel.org,
	Paolo Abeni <pabeni@...hat.com>,
	Richard Cochran <richardcochran@...il.com>,
	Stanislav Fomichev <sdf@...ichev.me>
Subject: [PATCH net-next v2 02/11] net: stmmac: disable PTP clock after
 unregistering PTP

Follow the principle of unpublish from userspace and then teardown
resources.

Disable the PTP clock only after unregistering with the PTP subsystem,
which ensures that we only stop the clock that ticks the timesource
after we have removed the PTP device.

Signed-off-by: Russell King (Oracle) <rmk+kernel@...linux.org.uk>
---
 drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index 419cb49ee5a2..5d76cf7957ab 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -817,8 +817,8 @@ static int stmmac_init_ptp(struct stmmac_priv *priv)
 
 static void stmmac_release_ptp(struct stmmac_priv *priv)
 {
-	clk_disable_unprepare(priv->plat->clk_ptp_ref);
 	stmmac_ptp_unregister(priv);
+	clk_disable_unprepare(priv->plat->clk_ptp_ref);
 }
 
 /**
-- 
2.47.3