From f4693b81ea3802d2c28c868e1639e580d0da2d1f Mon Sep 17 00:00:00 2001
From: Sergei Antonov <saproj@gmail.com>
Date: Thu, 18 Aug 2022 12:23:17 +0300
Subject: [PATCH] net: moxa: MAC address reading, generating, validity checking
This device does not remember its MAC address, so add a possibility
to get it from the platform. If it fails, generate a random address.
This will provide a MAC address early during boot without user space
being involved.
Also remove extra calls to is_valid_ether_addr().
Made after suggestions by Andrew Lunn:
1) Use eth_hw_addr_random() to assign a random MAC address during probe.
2) Remove is_valid_ether_addr() from moxart_mac_open()
3) Add a call to platform_get_ethdev_address() during probe
4) Remove is_valid_ether_addr() from moxart_set_mac_address(). The core does this
v1 -> v2:
Handle EPROBE_DEFER returned from platform_get_ethdev_address().
Move MAC reading code to the beginning of the probe function.
Signed-off-by: Sergei Antonov <saproj@gmail.com>
Suggested-by: Andrew Lunn <andrew@lunn.ch>
CC: Yang Yingliang <yangyingliang@huawei.com>
CC: Pavel Skripkin <paskripkin@gmail.com>
CC: Guobin Huang <huangguobin4@huawei.com>
CC: Yang Wei <yang.wei9@zte.com.cn>
CC: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
Link: https://lore.kernel.org/r/20220818092317.529557-1-saproj@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---
drivers/net/ethernet/moxa/moxart_ether.c | 13 +++++++------
1 file changed, 7 insertions(+), 6 deletions(-)
diff --git a/drivers/net/ethernet/moxa/moxart_ether.c b/drivers/net/ethernet/moxa/moxart_ether.c
index f11f1cb92025f..19009a6bd33ae 100644
--- a/drivers/net/ethernet/moxa/moxart_ether.c
+++ b/drivers/net/ethernet/moxa/moxart_ether.c
@@ -62,9 +62,6 @@ static int moxart_set_mac_address(struct net_device *ndev, void *addr)
{
struct sockaddr *address = addr;
- if (!is_valid_ether_addr(address->sa_data))
- return -EADDRNOTAVAIL;
-
eth_hw_addr_set(ndev, address->sa_data);
moxart_update_mac_address(ndev);
@@ -172,9 +169,6 @@ static int moxart_mac_open(struct net_device *ndev)
{
struct moxart_mac_priv_t *priv = netdev_priv(ndev);
- if (!is_valid_ether_addr(ndev->dev_addr))
- return -EADDRNOTAVAIL;
-
napi_enable(&priv->napi);
moxart_mac_reset(ndev);
@@ -488,6 +482,13 @@ static int moxart_mac_probe(struct platform_device *pdev)
}
ndev->base_addr = res->start;
+ ret = platform_get_ethdev_address(p_dev, ndev);
+ if (ret == -EPROBE_DEFER)
+ goto init_fail;
+ if (ret)
+ eth_hw_addr_random(ndev);
+ moxart_update_mac_address(ndev);
+
spin_lock_init(&priv->txlock);
priv->tx_buf_size = TX_BUF_SIZE;
--
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