From: Joakim Zhang <qiangqing.zhang@nxp.com>
To: davem@davemloft.net, kuba@kernel.org
Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH net 2/2] net: fec: add defer probe for of_get_mac_address
Date: Wed, 12 May 2021 10:44:00 +0800 [thread overview]
Message-ID: <20210512024400.19041-3-qiangqing.zhang@nxp.com> (raw)
In-Reply-To: <20210512024400.19041-1-qiangqing.zhang@nxp.com>
From: Fugang Duan <fugang.duan@nxp.com>
If MAC address read from nvmem efuse by calling .of_get_mac_address(),
but nvmem efuse is registered later than the driver, then it
return -EPROBE_DEFER value. So modify the driver to support
defer probe when read MAC address from nvmem efuse.
Signed-off-by: Fugang Duan <fugang.duan@nxp.com>
Signed-off-by: Joakim Zhang <qiangqing.zhang@nxp.com>
---
drivers/net/ethernet/freescale/fec_main.c | 13 ++++++++++---
1 file changed, 10 insertions(+), 3 deletions(-)
diff --git a/drivers/net/ethernet/freescale/fec_main.c b/drivers/net/ethernet/freescale/fec_main.c
index a2ada39c22d7..ad82cffc6f3f 100644
--- a/drivers/net/ethernet/freescale/fec_main.c
+++ b/drivers/net/ethernet/freescale/fec_main.c
@@ -1662,7 +1662,7 @@ static int fec_enet_rx_napi(struct napi_struct *napi, int budget)
}
/* ------------------------------------------------------------------------- */
-static void fec_get_mac(struct net_device *ndev)
+static int fec_get_mac(struct net_device *ndev)
{
struct fec_enet_private *fep = netdev_priv(ndev);
unsigned char *iap, tmpaddr[ETH_ALEN];
@@ -1685,6 +1685,8 @@ static void fec_get_mac(struct net_device *ndev)
ret = of_get_mac_address(np, tmpaddr);
if (!ret)
iap = tmpaddr;
+ else if (ret == -EPROBE_DEFER)
+ return ret;
}
}
@@ -1723,7 +1725,7 @@ static void fec_get_mac(struct net_device *ndev)
eth_hw_addr_random(ndev);
dev_info(&fep->pdev->dev, "Using random MAC address: %pM\n",
ndev->dev_addr);
- return;
+ return 0;
}
memcpy(ndev->dev_addr, iap, ETH_ALEN);
@@ -1731,6 +1733,8 @@ static void fec_get_mac(struct net_device *ndev)
/* Adjust MAC if using macaddr */
if (iap == macaddr)
ndev->dev_addr[ETH_ALEN-1] = macaddr[ETH_ALEN-1] + fep->dev_id;
+
+ return 0;
}
/* ------------------------------------------------------------------------- */
@@ -3305,7 +3309,10 @@ static int fec_enet_init(struct net_device *ndev)
}
/* Get the Ethernet address */
- fec_get_mac(ndev);
+ ret = fec_get_mac(ndev);
+ if (ret)
+ goto free_queue_mem;
+
/* make sure MAC we just acquired is programmed into the hw */
fec_set_mac_address(ndev, NULL);
--
2.17.1
next prev parent reply other threads:[~2021-05-12 2:45 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-12 2:43 [PATCH net 0/2] net: fixes for fec driver Joakim Zhang
2021-05-12 2:43 ` [PATCH net 1/2] net: fec: fix the potential memory leak in fec_enet_init() Joakim Zhang
2021-05-12 2:44 ` Joakim Zhang [this message]
2021-05-12 21:10 ` [PATCH net 0/2] net: fixes for fec driver patchwork-bot+netdevbpf
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