43 lines
1.6 KiB
Diff
43 lines
1.6 KiB
Diff
From 029497e66bdc762e001880e4c85a91f35a54b1e2 Mon Sep 17 00:00:00 2001
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From: Christian Lamparter <chunkeey@gmail.com>
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Date: Sun, 19 Sep 2021 13:57:25 +0200
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Subject: [PATCH] net: bgmac-bcma: handle deferred probe error due to
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mac-address
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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Due to the inclusion of nvmem handling into the mac-address getter
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function of_get_mac_address() by
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commit d01f449c008a ("of_net: add NVMEM support to of_get_mac_address")
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it is now possible to get a -EPROBE_DEFER return code. Which did cause
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bgmac to assign a random ethernet address.
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This exact issue happened on my Meraki MR32. The nvmem provider is
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an EEPROM (at24c64) which gets instantiated once the module
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driver is loaded... This happens once the filesystem becomes available.
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With this patch, bgmac_probe() will propagate the -EPROBE_DEFER error.
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Then the driver subsystem will reschedule the probe at a later time.
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Cc: Petr Štetiar <ynezz@true.cz>
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Cc: Michael Walle <michael@walle.cc>
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Fixes: d01f449c008a ("of_net: add NVMEM support to of_get_mac_address")
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Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
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Signed-off-by: David S. Miller <davem@davemloft.net>
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---
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drivers/net/ethernet/broadcom/bgmac-bcma.c | 2 ++
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1 file changed, 2 insertions(+)
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--- a/drivers/net/ethernet/broadcom/bgmac-bcma.c
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+++ b/drivers/net/ethernet/broadcom/bgmac-bcma.c
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@@ -129,6 +129,8 @@ static int bgmac_probe(struct bcma_devic
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bcma_set_drvdata(core, bgmac);
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err = of_get_mac_address(bgmac->dev->of_node, bgmac->net_dev->dev_addr);
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+ if (err == -EPROBE_DEFER)
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+ return err;
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/* If no MAC address assigned via device tree, check SPROM */
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if (err) {
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