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net: ag71xx: support probe defferal for getting MAC address

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Currently, of_get_ethdev_address() return is checked for any return error
code which means that trying to get the MAC from NVMEM cells that is backed
by MTD will fail if it was not probed before ag71xx.

So, lets check the return error code for EPROBE_DEFER and defer the ag71xx
probe in that case until the underlying NVMEM device is live.

Signed-off-by: Robert Marko <robimarko@gmail.com>
Signed-off-by: Rosen Penev <rosenp@gmail.com>
Reviewed-by: Oleksij Rempel <o.rempel@pengutronix.de>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://patch.msgid.link/20240824200249.137209-1-rosenp@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Rosen Penev
2024-08-24 13:02:37 -07:00
committed by Jakub Kicinski
parent 0eaebf738e
commit be04024a24
1 changed files with 2 additions and 0 deletions
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drivers/net/ethernet/atheros/ag71xx.c
+2
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@@ -1895,6 +1895,8 @@ static int ag71xx_probe(struct platform_device *pdev)
ag->stop_desc->next = (u32)ag->stop_desc_dma;
err = of_get_ethdev_address(np, ndev);
if (err == -EPROBE_DEFER)
return err;
if (err) {
netif_err(ag, probe, ndev, "invalid MAC address, using random address\n");
eth_hw_addr_random(ndev);