From: Clément Léger <clement.leger@bootlin.com>
Date: Mon, 9 Jan 2023 15:32:23 +0000 (+0100)
Subject: net: lan966x: check for ptp to be enabled in lan966x_ptp_deinit()
X-Git-Tag: v6.1.8~204
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=c2258d55935c23095e545c7e36f08d8b3433969b;p=platform%2Fkernel%2Flinux-starfive.git

net: lan966x: check for ptp to be enabled in lan966x_ptp_deinit()

[ Upstream commit b0e380b5d4275299adf43e249f18309331b6f54f ]

If ptp was not enabled due to missing IRQ for instance,
lan966x_ptp_deinit() will dereference NULL pointers.

Fixes: d096459494a8 ("net: lan966x: Add support for ptp clocks")
Signed-off-by: Clément Léger <clement.leger@bootlin.com>
Reviewed-by: Horatiu Vultur <horatiu.vultur@microchip.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---

diff --git a/drivers/net/ethernet/microchip/lan966x/lan966x_ptp.c b/drivers/net/ethernet/microchip/lan966x/lan966x_ptp.c
index e5a2bbe..8e36831 100644
--- a/drivers/net/ethernet/microchip/lan966x/lan966x_ptp.c
+++ b/drivers/net/ethernet/microchip/lan966x/lan966x_ptp.c
@@ -853,6 +853,9 @@ void lan966x_ptp_deinit(struct lan966x *lan966x)
 	struct lan966x_port *port;
 	int i;
 
+	if (!lan966x->ptp)
+		return;
+
 	for (i = 0; i < lan966x->num_phys_ports; i++) {
 		port = lan966x->ports[i];
 		if (!port)