linux-kernel - [PATCH net-next] net: mscc: ocelot: Fix probe for vsc7514

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Message-ID: <20210817120633.404790-1-horatiu.vultur@microchip.com>
Date:   Tue, 17 Aug 2021 14:06:33 +0200
From:   Horatiu Vultur <horatiu.vultur@...rochip.com>
To:     <vladimir.oltean@....com>, <claudiu.manoil@....com>,
        <alexandre.belloni@...tlin.com>, <UNGLinuxDriver@...rochip.com>,
        <davem@...emloft.net>, <kuba@...nel.org>, <netdev@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
CC:     Horatiu Vultur <horatiu.vultur@...rochip.com>
Subject: [PATCH net-next] net: mscc: ocelot: Fix probe for vsc7514

The check for parsing the 'phy-handle' was removed in the blamed commit.
Therefor it would try to create phylinks for each port and connect to
the phys. But on ocelot_pcb123 and ocelot_pcb120 not all the ports have
a phy, so this will failed. So the probe of the network driver will
fail.

The fix consists in adding back the check for 'phy-handle' for vsc7514

Fixes: e6e12df625f2 ("net: mscc: ocelot: convert to phylink")
Signed-off-by: Horatiu Vultur <horatiu.vultur@...rochip.com>
---
 drivers/net/ethernet/mscc/ocelot_vsc7514.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/net/ethernet/mscc/ocelot_vsc7514.c b/drivers/net/ethernet/mscc/ocelot_vsc7514.c
index 18aed504f45d..96ac64f13382 100644
--- a/drivers/net/ethernet/mscc/ocelot_vsc7514.c
+++ b/drivers/net/ethernet/mscc/ocelot_vsc7514.c
@@ -954,6 +954,9 @@ static int mscc_ocelot_init_ports(struct platform_device *pdev,
 		if (of_property_read_u32(portnp, "reg", &reg))
 			continue;
 
+		if (!of_parse_phandle(portnp, "phy-handle", 0))
+			continue;
+
 		port = reg;
 		if (port < 0 || port >= ocelot->num_phys_ports) {
 			dev_err(ocelot->dev,
-- 
2.31.1