From: Lukasz Majewski <lukma@denx.de>
To: Vladimir Oltean <olteanv@gmail.com>,
Jakub Kicinski <kuba@kernel.org>,
netdev@vger.kernel.org, Paolo Abeni <pabeni@redhat.com>
Cc: Eric Dumazet <edumazet@google.com>,
"David S. Miller" <davem@davemloft.net>,
Oleksij Rempel <o.rempel@pengutronix.de>,
Tristram.Ha@microchip.com,
Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
Simon Horman <horms@kernel.org>,
Dan Carpenter <dan.carpenter@linaro.org>,
"Ricardo B. Marliere" <ricardo@marliere.net>,
Casper Andersson <casper.casan@gmail.com>,
linux-kernel@vger.kernel.org,
Woojung Huh <woojung.huh@microchip.com>,
UNGLinuxDriver@microchip.com, Andrew Lunn <andrew@lunn.ch>,
Lukasz Majewski <lukma@denx.de>
Subject: [PATCH v1 net-next] net: dsa: Allow only up to two HSR HW offloaded ports for KSZ9477
Date: Tue, 18 Jun 2024 15:04:33 +0200 [thread overview]
Message-ID: <20240618130433.1111485-1-lukma@denx.de> (raw)
The KSZ9477 allows HSR in-HW offloading for any of two selected ports.
This patch adds check if one tries to use more than two ports with
HSR offloading enabled.
Signed-off-by: Lukasz Majewski <lukma@denx.de>
---
drivers/net/dsa/microchip/ksz_common.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/net/dsa/microchip/ksz_common.c b/drivers/net/dsa/microchip/ksz_common.c
index 2818e24e2a51..0d68f0a5bf19 100644
--- a/drivers/net/dsa/microchip/ksz_common.c
+++ b/drivers/net/dsa/microchip/ksz_common.c
@@ -3913,6 +3913,9 @@ static int ksz_hsr_join(struct dsa_switch *ds, int port, struct net_device *hsr,
if (ret)
return ret;
+ if (dev->chip_id == KSZ9477_CHIP_ID && hweight8(dev->hsr_ports) > 1)
+ return -EOPNOTSUPP;
+
ksz9477_hsr_join(ds, port, hsr);
dev->hsr_dev = hsr;
dev->hsr_ports |= BIT(port);
--
2.20.1
next reply other threads:[~2024-06-18 13:04 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-06-18 13:04 Lukasz Majewski [this message]
2024-06-18 13:42 ` [PATCH v1 net-next] net: dsa: Allow only up to two HSR HW offloaded ports for KSZ9477 Dan Carpenter
2024-06-18 13:49 ` Lukasz Majewski
2024-06-18 13:52 ` Andrew Lunn
2024-06-18 14:06 ` Dan Carpenter
2024-06-18 14:31 ` Woojung.Huh
2024-06-18 14:45 ` Lukasz Majewski
2024-06-18 14:56 ` Woojung.Huh
2024-06-18 14:58 ` Andrew Lunn
2024-06-18 15:02 ` Lukasz Majewski
2024-06-18 14:31 ` Lukasz Majewski
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