linux-kernel - [PATCH net v1 1/2] net: dsa: microchip: fix devicetree parsing of cpu node

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Date:   Sat,  5 Dec 2020 10:28:13 -0500
From:   Sven Van Asbroeck <thesven73@...il.com>
To:     Woojung Huh <woojung.huh@...rochip.com>,
        Microchip Linux Driver Support <UNGLinuxDriver@...rochip.com>,
        Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Vladimir Oltean <olteanv@...il.com>,
        David S Miller <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>
Cc:     Sven Van Asbroeck <thesven73@...il.com>,
        Helmut Grohne <helmut.grohne@...enta.de>,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH net v1 1/2] net: dsa: microchip: fix devicetree parsing of cpu node

From: Sven Van Asbroeck <thesven73@...il.com>

On the ksz8795, if the devicetree contains a cpu node,
devicetree parsing fails and the whole driver errors out.

Fix the devicetree parsing code by making it use the
correct number of ports.

Fixes: 912aae27c6af ("net: dsa: microchip: really look for phy-mode in port nodes")
Tested-by: Sven Van Asbroeck <thesven73@...il.com> # ksz8795
Signed-off-by: Sven Van Asbroeck <thesven73@...il.com>
---

Tree: git://git.kernel.org/pub/scm/linux/kernel/git/davem/net.git # 905b2032fa42

To: Woojung Huh <woojung.huh@...rochip.com>
To: Microchip Linux Driver Support <UNGLinuxDriver@...rochip.com>
To: Andrew Lunn <andrew@...n.ch>
To: Vivien Didelot <vivien.didelot@...il.com>
To: Florian Fainelli <f.fainelli@...il.com>
To: Vladimir Oltean <olteanv@...il.com>
To: "David S. Miller" <davem@...emloft.net>
To: Jakub Kicinski <kuba@...nel.org>
Cc: Helmut Grohne <helmut.grohne@...enta.de>
Cc: netdev@...r.kernel.org
Cc: linux-kernel@...r.kernel.org

 drivers/net/dsa/microchip/ksz_common.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/dsa/microchip/ksz_common.c b/drivers/net/dsa/microchip/ksz_common.c
index e5f047129b15..17b804c44c53 100644
--- a/drivers/net/dsa/microchip/ksz_common.c
+++ b/drivers/net/dsa/microchip/ksz_common.c
@@ -431,7 +431,7 @@ int ksz_switch_register(struct ksz_device *dev,
 				if (of_property_read_u32(port, "reg",
 							 &port_num))
 					continue;
-				if (port_num >= dev->port_cnt)
+				if (port_num >= dev->ds->num_ports)
 					return -EINVAL;
 				of_get_phy_mode(port,
 						&dev->ports[port_num].interface);
-- 
2.17.1