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From:   Nikita Shubin <nikita.shubin@maquefel.me>
Cc:     linux@yadro.com, Nikita Shubin <n.shubin@yadro.com>,
        Andrew Lunn <andrew@lunn.ch>,
        Heiner Kallweit <hkallweit1@gmail.com>,
        Russell King <linux@armlinux.org.uk>,
        "David S. Miller" <davem@davemloft.net>,
        Eric Dumazet <edumazet@google.com>,
        Jakub Kicinski <kuba@kernel.org>,
        Paolo Abeni <pabeni@redhat.com>,
        Rasmus Villemoes <linux@rasmusvillemoes.dk>,
        netdev@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH] net: phy: dp83867: fix get nvmem cell fail
Date:   Fri,  5 Aug 2022 11:48:43 +0300
Message-Id: <20220805084843.24542-1-nikita.shubin@maquefel.me>
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From: Nikita Shubin <n.shubin@yadro.com>

If CONFIG_NVMEM is not set of_nvmem_cell_get, of_nvmem_device_get
functions will return ERR_PTR(-EOPNOTSUPP) and "failed to get nvmem
cell io_impedance_ctrl" error would be reported despite "io_impedance_ctrl"
is completely missing in Device Tree and we should use default values.

Check -EOPNOTSUPP togather with -ENOENT to avoid this situation.

Fixes: 5c2d0a6a0701 ("net: phy: dp83867: implement support for io_impedance_ctrl nvmem cell")
Signed-off-by: Nikita Shubin <n.shubin@yadro.com>
---
 drivers/net/phy/dp83867.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/phy/dp83867.c b/drivers/net/phy/dp83867.c
index 1e38039c5c56..6939563d3b7c 100644
--- a/drivers/net/phy/dp83867.c
+++ b/drivers/net/phy/dp83867.c
@@ -535,7 +535,7 @@ static int dp83867_of_init_io_impedance(struct phy_device *phydev)
 	cell = of_nvmem_cell_get(of_node, "io_impedance_ctrl");
 	if (IS_ERR(cell)) {
 		ret = PTR_ERR(cell);
-		if (ret != -ENOENT)
+		if (ret != -ENOENT && ret != -EOPNOTSUPP)
 			return phydev_err_probe(phydev, ret,
 						"failed to get nvmem cell io_impedance_ctrl\n");
 
-- 
2.35.1