From: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
To: peppe.cavallaro@st.com, alexandre.torgue@st.com,
joabreu@synopsys.com, davem@davemloft.net,
netdev@vger.kernel.org
Cc: Martin Blumenstingl <martin.blumenstingl@googlemail.com>,
linux-amlogic@lists.infradead.org, linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org
Subject: [PATCH] net: stmmac: manage errors returned by of_get_mac_address()
Date: Sat, 27 Jul 2019 21:21:37 +0200 [thread overview]
Message-ID: <20190727192137.27881-1-martin.blumenstingl@googlemail.com> (raw)
Commit d01f449c008a ("of_net: add NVMEM support to of_get_mac_address")
added support for reading the MAC address from an nvmem-cell. This
required changing the logic to return an error pointer upon failure.
If stmmac is loaded before the nvmem provider driver then
of_get_mac_address() return an error pointer with -EPROBE_DEFER.
Propagate this error so the stmmac driver will be probed again after the
nvmem provider driver is loaded.
Default to a random generated MAC address in case of any other error,
instead of using the error pointer as MAC address.
Fixes: d01f449c008a ("of_net: add NVMEM support to of_get_mac_address")
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
---
drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
index 73fc2524372e..154daf4d1072 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
@@ -370,6 +370,13 @@ stmmac_probe_config_dt(struct platform_device *pdev, const char **mac)
return ERR_PTR(-ENOMEM);
*mac = of_get_mac_address(np);
+ if (IS_ERR(*mac)) {
+ if (PTR_ERR(*mac) == -EPROBE_DEFER)
+ return ERR_CAST(*mac);
+
+ *mac = NULL;
+ }
+
plat->interface = of_get_phy_mode(np);
/* Some wrapper drivers still rely on phy_node. Let's save it while
--
2.22.0
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next reply other threads:[~2019-07-27 19:22 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-27 19:21 Martin Blumenstingl [this message]
2019-07-29 13:03 ` [PATCH] net: stmmac: manage errors returned by of_get_mac_address() Neil Armstrong
2019-07-29 17:57 ` David Miller
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