[EXT] [PATCH net-next v2 1/4] net: ethernet: support of_get_mac_address new ERR_PTR error
Andy Duan
fugang.duan at nxp.com
Wed May 8 03:07:27 UTC 2019
From: Petr Štetiar <ynezz at true.cz> Sent: Tuesday, May 7, 2019 5:25 AM
> There was NVMEM support added to of_get_mac_address, so it could now
> return ERR_PTR encoded error values, so we need to adjust all current users
> of of_get_mac_address to this new fact.
>
> While at it, remove superfluous is_valid_ether_addr as the MAC address
> returned from of_get_mac_address is always valid and checked by
> is_valid_ether_addr anyway.
>
> Fixes: d01f449c008a ("of_net: add NVMEM support to of_get_mac_address")
> Signed-off-by: Petr Štetiar <ynezz at true.cz>
Test the patch on i.MX8MQ platform that fix the mem abort issue that is introduced in next-190507.
Tested-by: Fugang Duan <fugang.duan at nxp.com>
> ---
>
> This is defacto v5 of the previous 05/10 patch in the series, but since the
> v4 of this 05/10 patch wasn't picked up by the patchwork for some unknown
> reason, this patch wasn't applied with the other 9 patches in the series, so
> I'm resending it as a separate patch of this fixup series.
>
> Changes since v1:
>
> * added Fixes: tag
>
> Previous changelog (Patch 05/10):
>
> Changes since v3:
>
> * IS_ERR_OR_NULL -> IS_ERR
>
> Changes since v4:
>
> * I've just blindly replaced IS_ERR_OR_NULL with IS_ERR, but I've just
> realized, that in some cases we still need to check for NULL, so I've
> corrected it in following drivers/files:
>
> - broadcom/bgmac-bcma.c
> - marvell/pxa168_eth.c
> - samsung/sxgbe/sxgbe_platform.c
> - stmicro/stmmac/stmmac_main.c
> - wiznet/w5100.c
> - ethernet/eth.c
>
> drivers/net/ethernet/aeroflex/greth.c | 2 +-
> drivers/net/ethernet/allwinner/sun4i-emac.c | 2 +-
> drivers/net/ethernet/altera/altera_tse_main.c | 2 +-
> drivers/net/ethernet/arc/emac_main.c | 2 +-
> drivers/net/ethernet/aurora/nb8800.c | 2 +-
> drivers/net/ethernet/broadcom/bcmsysport.c | 2 +-
> drivers/net/ethernet/broadcom/bgmac-bcma.c | 2 +-
> drivers/net/ethernet/broadcom/bgmac-platform.c | 2 +-
> drivers/net/ethernet/broadcom/genet/bcmgenet.c | 2 +-
> drivers/net/ethernet/cavium/octeon/octeon_mgmt.c | 2 +-
> drivers/net/ethernet/cavium/thunder/thunder_bgx.c | 2 +-
> drivers/net/ethernet/davicom/dm9000.c | 2 +-
> drivers/net/ethernet/ethoc.c | 2 +-
> drivers/net/ethernet/ezchip/nps_enet.c | 2 +-
> drivers/net/ethernet/freescale/fec_main.c | 2 +-
> drivers/net/ethernet/freescale/fec_mpc52xx.c | 2 +-
> drivers/net/ethernet/freescale/fman/mac.c | 2 +-
> drivers/net/ethernet/freescale/fs_enet/fs_enet-main.c | 2 +-
> drivers/net/ethernet/freescale/gianfar.c | 2 +-
> drivers/net/ethernet/freescale/ucc_geth.c | 2 +-
> drivers/net/ethernet/hisilicon/hisi_femac.c | 2 +-
> drivers/net/ethernet/hisilicon/hix5hd2_gmac.c | 2 +-
> drivers/net/ethernet/lantiq_xrx200.c | 2 +-
> drivers/net/ethernet/marvell/mv643xx_eth.c | 2 +-
> drivers/net/ethernet/marvell/mvneta.c | 2 +-
> drivers/net/ethernet/marvell/pxa168_eth.c | 2 +-
> drivers/net/ethernet/marvell/sky2.c | 2 +-
> drivers/net/ethernet/mediatek/mtk_eth_soc.c | 2 +-
> drivers/net/ethernet/micrel/ks8851.c | 2 +-
> drivers/net/ethernet/micrel/ks8851_mll.c | 2 +-
> drivers/net/ethernet/nxp/lpc_eth.c | 2 +-
> drivers/net/ethernet/qualcomm/qca_spi.c | 2 +-
> drivers/net/ethernet/qualcomm/qca_uart.c | 2 +-
> drivers/net/ethernet/renesas/ravb_main.c | 2 +-
> drivers/net/ethernet/renesas/sh_eth.c | 2 +-
> drivers/net/ethernet/samsung/sxgbe/sxgbe_platform.c | 2 +-
> drivers/net/ethernet/socionext/sni_ave.c | 2 +-
> drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 2 +-
> drivers/net/ethernet/ti/cpsw.c | 2 +-
> drivers/net/ethernet/ti/netcp_core.c | 2 +-
> drivers/net/ethernet/wiznet/w5100.c | 2 +-
> drivers/net/ethernet/xilinx/ll_temac_main.c | 2 +-
> drivers/net/ethernet/xilinx/xilinx_axienet_main.c | 2 +-
> drivers/net/ethernet/xilinx/xilinx_emaclite.c | 2 +-
> net/ethernet/eth.c | 2 +-
> 45 files changed, 45 insertions(+), 45 deletions(-)
>
> diff --git a/drivers/net/ethernet/aeroflex/greth.c
> b/drivers/net/ethernet/aeroflex/greth.c
> index 47e5984..7c5cf02 100644
> --- a/drivers/net/ethernet/aeroflex/greth.c
> +++ b/drivers/net/ethernet/aeroflex/greth.c
> @@ -1459,7 +1459,7 @@ static int greth_of_probe(struct platform_device
> *ofdev)
> const u8 *addr;
>
> addr = of_get_mac_address(ofdev->dev.of_node);
> - if (addr) {
> + if (!IS_ERR(addr)) {
> for (i = 0; i < 6; i++)
> macaddr[i] = (unsigned int) addr[i];
> } else {
> diff --git a/drivers/net/ethernet/allwinner/sun4i-emac.c
> b/drivers/net/ethernet/allwinner/sun4i-emac.c
> index e1acafa..37ebd89 100644
> --- a/drivers/net/ethernet/allwinner/sun4i-emac.c
> +++ b/drivers/net/ethernet/allwinner/sun4i-emac.c
> @@ -870,7 +870,7 @@ static int emac_probe(struct platform_device *pdev)
>
> /* Read MAC-address from DT */
> mac_addr = of_get_mac_address(np);
> - if (mac_addr)
> + if (!IS_ERR(mac_addr))
> memcpy(ndev->dev_addr, mac_addr, ETH_ALEN);
>
> /* Check if the MAC address is valid, if not get a random one */ diff
> --git a/drivers/net/ethernet/altera/altera_tse_main.c
> b/drivers/net/ethernet/altera/altera_tse_main.c
> index aa1d1f5..877e67f 100644
> --- a/drivers/net/ethernet/altera/altera_tse_main.c
> +++ b/drivers/net/ethernet/altera/altera_tse_main.c
> @@ -1537,7 +1537,7 @@ static int altera_tse_probe(struct platform_device
> *pdev)
>
> /* get default MAC address from device tree */
> macaddr = of_get_mac_address(pdev->dev.of_node);
> - if (macaddr)
> + if (!IS_ERR(macaddr))
> ether_addr_copy(ndev->dev_addr, macaddr);
> else
> eth_hw_addr_random(ndev); diff --git
> a/drivers/net/ethernet/arc/emac_main.c
> b/drivers/net/ethernet/arc/emac_main.c
> index ff3d685..7f89ad5 100644
> --- a/drivers/net/ethernet/arc/emac_main.c
> +++ b/drivers/net/ethernet/arc/emac_main.c
> @@ -960,7 +960,7 @@ int arc_emac_probe(struct net_device *ndev, int
> interface)
> /* Get MAC address from device tree */
> mac_addr = of_get_mac_address(dev->of_node);
>
> - if (mac_addr)
> + if (!IS_ERR(mac_addr))
> memcpy(ndev->dev_addr, mac_addr, ETH_ALEN);
> else
> eth_hw_addr_random(ndev); diff --git
> a/drivers/net/ethernet/aurora/nb8800.c
> b/drivers/net/ethernet/aurora/nb8800.c
> index f62deeb..3c4967e 100644
> --- a/drivers/net/ethernet/aurora/nb8800.c
> +++ b/drivers/net/ethernet/aurora/nb8800.c
> @@ -1463,7 +1463,7 @@ static int nb8800_probe(struct platform_device
> *pdev)
> dev->irq = irq;
>
> mac = of_get_mac_address(pdev->dev.of_node);
> - if (mac)
> + if (!IS_ERR(mac))
> ether_addr_copy(dev->dev_addr, mac);
>
> if (!is_valid_ether_addr(dev->dev_addr))
> diff --git a/drivers/net/ethernet/broadcom/bcmsysport.c
> b/drivers/net/ethernet/broadcom/bcmsysport.c
> index 4e87a30..c623896 100644
> --- a/drivers/net/ethernet/broadcom/bcmsysport.c
> +++ b/drivers/net/ethernet/broadcom/bcmsysport.c
> @@ -2505,7 +2505,7 @@ static int bcm_sysport_probe(struct
> platform_device *pdev)
>
> /* Initialize netdevice members */
> macaddr = of_get_mac_address(dn);
> - if (!macaddr || !is_valid_ether_addr(macaddr)) {
> + if (IS_ERR(macaddr)) {
> dev_warn(&pdev->dev, "using random Ethernet MAC\n");
> eth_hw_addr_random(dev);
> } else {
> diff --git a/drivers/net/ethernet/broadcom/bgmac-bcma.c
> b/drivers/net/ethernet/broadcom/bgmac-bcma.c
> index 6fe074c..34d1830 100644
> --- a/drivers/net/ethernet/broadcom/bgmac-bcma.c
> +++ b/drivers/net/ethernet/broadcom/bgmac-bcma.c
> @@ -132,7 +132,7 @@ static int bgmac_probe(struct bcma_device *core)
> mac = of_get_mac_address(bgmac->dev->of_node);
>
> /* If no MAC address assigned via device tree, check SPROM */
> - if (!mac) {
> + if (IS_ERR_OR_NULL(mac)) {
> switch (core->core_unit) {
> case 0:
> mac = sprom->et0mac; diff --git
> a/drivers/net/ethernet/broadcom/bgmac-platform.c
> b/drivers/net/ethernet/broadcom/bgmac-platform.c
> index 894eda5..6dc0dd9 100644
> --- a/drivers/net/ethernet/broadcom/bgmac-platform.c
> +++ b/drivers/net/ethernet/broadcom/bgmac-platform.c
> @@ -193,7 +193,7 @@ static int bgmac_probe(struct platform_device *pdev)
> bgmac->dma_dev = &pdev->dev;
>
> mac_addr = of_get_mac_address(np);
> - if (mac_addr)
> + if (!IS_ERR(mac_addr))
> ether_addr_copy(bgmac->net_dev->dev_addr,
> mac_addr);
> else
> dev_warn(&pdev->dev, "MAC address not present in
> device tree\n"); diff --git
> a/drivers/net/ethernet/broadcom/genet/bcmgenet.c
> b/drivers/net/ethernet/broadcom/genet/bcmgenet.c
> index 4fd9735..374b9ff 100644
> --- a/drivers/net/ethernet/broadcom/genet/bcmgenet.c
> +++ b/drivers/net/ethernet/broadcom/genet/bcmgenet.c
> @@ -3476,7 +3476,7 @@ static int bcmgenet_probe(struct platform_device
> *pdev)
>
> if (dn) {
> macaddr = of_get_mac_address(dn);
> - if (!macaddr) {
> + if (IS_ERR(macaddr)) {
> dev_err(&pdev->dev, "can't find MAC
> address\n");
> err = -EINVAL;
> goto err;
> diff --git a/drivers/net/ethernet/cavium/octeon/octeon_mgmt.c
> b/drivers/net/ethernet/cavium/octeon/octeon_mgmt.c
> index 5359c10..15b1130 100644
> --- a/drivers/net/ethernet/cavium/octeon/octeon_mgmt.c
> +++ b/drivers/net/ethernet/cavium/octeon/octeon_mgmt.c
> @@ -1503,7 +1503,7 @@ static int octeon_mgmt_probe(struct
> platform_device *pdev)
>
> mac = of_get_mac_address(pdev->dev.of_node);
>
> - if (mac)
> + if (!IS_ERR(mac))
> memcpy(netdev->dev_addr, mac, ETH_ALEN);
> else
> eth_hw_addr_random(netdev); diff --git
> a/drivers/net/ethernet/cavium/thunder/thunder_bgx.c
> b/drivers/net/ethernet/cavium/thunder/thunder_bgx.c
> index 81c281a..a65be85 100644
> --- a/drivers/net/ethernet/cavium/thunder/thunder_bgx.c
> +++ b/drivers/net/ethernet/cavium/thunder/thunder_bgx.c
> @@ -1484,7 +1484,7 @@ static int bgx_init_of_phy(struct bgx *bgx)
> break;
>
> mac = of_get_mac_address(node);
> - if (mac)
> + if (!IS_ERR(mac))
> ether_addr_copy(bgx->lmac[lmac].mac, mac);
>
> SET_NETDEV_DEV(&bgx->lmac[lmac].netdev,
> &bgx->pdev->dev); diff --git a/drivers/net/ethernet/davicom/dm9000.c
> b/drivers/net/ethernet/davicom/dm9000.c
> index c2586f4..953ee56 100644
> --- a/drivers/net/ethernet/davicom/dm9000.c
> +++ b/drivers/net/ethernet/davicom/dm9000.c
> @@ -1412,7 +1412,7 @@ static struct dm9000_plat_data
> *dm9000_parse_dt(struct device *dev)
> pdata->flags |= DM9000_PLATF_NO_EEPROM;
>
> mac_addr = of_get_mac_address(np);
> - if (mac_addr)
> + if (!IS_ERR(mac_addr))
> memcpy(pdata->dev_addr, mac_addr,
> sizeof(pdata->dev_addr));
>
> return pdata;
> diff --git a/drivers/net/ethernet/ethoc.c b/drivers/net/ethernet/ethoc.c
> index 0f3e7f2..71da049 100644
> --- a/drivers/net/ethernet/ethoc.c
> +++ b/drivers/net/ethernet/ethoc.c
> @@ -1153,7 +1153,7 @@ static int ethoc_probe(struct platform_device
> *pdev)
> const void *mac;
>
> mac = of_get_mac_address(pdev->dev.of_node);
> - if (mac)
> + if (!IS_ERR(mac))
> ether_addr_copy(netdev->dev_addr, mac);
> priv->phy_id = -1;
> }
> diff --git a/drivers/net/ethernet/ezchip/nps_enet.c
> b/drivers/net/ethernet/ezchip/nps_enet.c
> index 659f1ad..b4ce261 100644
> --- a/drivers/net/ethernet/ezchip/nps_enet.c
> +++ b/drivers/net/ethernet/ezchip/nps_enet.c
> @@ -616,7 +616,7 @@ static s32 nps_enet_probe(struct platform_device
> *pdev)
>
> /* set kernel MAC address to dev */
> mac_addr = of_get_mac_address(dev->of_node);
> - if (mac_addr)
> + if (!IS_ERR(mac_addr))
> ether_addr_copy(ndev->dev_addr, mac_addr);
> else
> eth_hw_addr_random(ndev); diff --git
> a/drivers/net/ethernet/freescale/fec_main.c
> b/drivers/net/ethernet/freescale/fec_main.c
> index a96ad20..aa7d4e2 100644
> --- a/drivers/net/ethernet/freescale/fec_main.c
> +++ b/drivers/net/ethernet/freescale/fec_main.c
> @@ -1655,7 +1655,7 @@ static void fec_get_mac(struct net_device *ndev)
> struct device_node *np = fep->pdev->dev.of_node;
> if (np) {
> const char *mac = of_get_mac_address(np);
> - if (mac)
> + if (!IS_ERR(mac))
> iap = (unsigned char *) mac;
> }
> }
> diff --git a/drivers/net/ethernet/freescale/fec_mpc52xx.c
> b/drivers/net/ethernet/freescale/fec_mpc52xx.c
> index c1968b3..7b7e526 100644
> --- a/drivers/net/ethernet/freescale/fec_mpc52xx.c
> +++ b/drivers/net/ethernet/freescale/fec_mpc52xx.c
> @@ -902,7 +902,7 @@ static int mpc52xx_fec_probe(struct platform_device
> *op)
> * First try to read MAC address from DT
> */
> mac_addr = of_get_mac_address(np);
> - if (mac_addr) {
> + if (!IS_ERR(mac_addr)) {
> memcpy(ndev->dev_addr, mac_addr, ETH_ALEN);
> } else {
> struct mpc52xx_fec __iomem *fec = priv->fec; diff --git
> a/drivers/net/ethernet/freescale/fman/mac.c
> b/drivers/net/ethernet/freescale/fman/mac.c
> index 3c21486..9cd2c28 100644
> --- a/drivers/net/ethernet/freescale/fman/mac.c
> +++ b/drivers/net/ethernet/freescale/fman/mac.c
> @@ -724,7 +724,7 @@ static int mac_probe(struct platform_device
> *_of_dev)
>
> /* Get the MAC address */
> mac_addr = of_get_mac_address(mac_node);
> - if (!mac_addr) {
> + if (IS_ERR(mac_addr)) {
> dev_err(dev, "of_get_mac_address(%pOF) failed\n",
> mac_node);
> err = -EINVAL;
> goto _return_of_get_parent; diff --git
> a/drivers/net/ethernet/freescale/fs_enet/fs_enet-main.c
> b/drivers/net/ethernet/freescale/fs_enet/fs_enet-main.c
> index 7c548ed..90ea7a1 100644
> --- a/drivers/net/ethernet/freescale/fs_enet/fs_enet-main.c
> +++ b/drivers/net/ethernet/freescale/fs_enet/fs_enet-main.c
> @@ -1014,7 +1014,7 @@ static int fs_enet_probe(struct platform_device
> *ofdev)
> spin_lock_init(&fep->tx_lock);
>
> mac_addr = of_get_mac_address(ofdev->dev.of_node);
> - if (mac_addr)
> + if (!IS_ERR(mac_addr))
> memcpy(ndev->dev_addr, mac_addr, ETH_ALEN);
>
> ret = fep->ops->allocate_bd(ndev); diff --git
> a/drivers/net/ethernet/freescale/gianfar.c
> b/drivers/net/ethernet/freescale/gianfar.c
> index 45fcc96..df13c69 100644
> --- a/drivers/net/ethernet/freescale/gianfar.c
> +++ b/drivers/net/ethernet/freescale/gianfar.c
> @@ -872,7 +872,7 @@ static int gfar_of_init(struct platform_device *ofdev,
> struct net_device **pdev)
>
> mac_addr = of_get_mac_address(np);
>
> - if (mac_addr)
> + if (!IS_ERR(mac_addr))
> memcpy(dev->dev_addr, mac_addr, ETH_ALEN);
>
> if (model && !strcasecmp(model, "TSEC")) diff --git
> a/drivers/net/ethernet/freescale/ucc_geth.c
> b/drivers/net/ethernet/freescale/ucc_geth.c
> index eb3e65e..216e99a 100644
> --- a/drivers/net/ethernet/freescale/ucc_geth.c
> +++ b/drivers/net/ethernet/freescale/ucc_geth.c
> @@ -3910,7 +3910,7 @@ static int ucc_geth_probe(struct platform_device*
> ofdev)
> }
>
> mac_addr = of_get_mac_address(np);
> - if (mac_addr)
> + if (!IS_ERR(mac_addr))
> memcpy(dev->dev_addr, mac_addr, ETH_ALEN);
>
> ugeth->ug_info = ug_info;
> diff --git a/drivers/net/ethernet/hisilicon/hisi_femac.c
> b/drivers/net/ethernet/hisilicon/hisi_femac.c
> index 2c28088..96c32ae 100644
> --- a/drivers/net/ethernet/hisilicon/hisi_femac.c
> +++ b/drivers/net/ethernet/hisilicon/hisi_femac.c
> @@ -870,7 +870,7 @@ static int hisi_femac_drv_probe(struct
> platform_device *pdev)
> phy_modes(phy->interface));
>
> mac_addr = of_get_mac_address(node);
> - if (mac_addr)
> + if (!IS_ERR(mac_addr))
> ether_addr_copy(ndev->dev_addr, mac_addr);
> if (!is_valid_ether_addr(ndev->dev_addr)) {
> eth_hw_addr_random(ndev); diff --git
> a/drivers/net/ethernet/hisilicon/hix5hd2_gmac.c
> b/drivers/net/ethernet/hisilicon/hix5hd2_gmac.c
> index e5d853b..b1cb58f 100644
> --- a/drivers/net/ethernet/hisilicon/hix5hd2_gmac.c
> +++ b/drivers/net/ethernet/hisilicon/hix5hd2_gmac.c
> @@ -1229,7 +1229,7 @@ static int hix5hd2_dev_probe(struct
> platform_device *pdev)
> }
>
> mac_addr = of_get_mac_address(node);
> - if (mac_addr)
> + if (!IS_ERR(mac_addr))
> ether_addr_copy(ndev->dev_addr, mac_addr);
> if (!is_valid_ether_addr(ndev->dev_addr)) {
> eth_hw_addr_random(ndev); diff --git
> a/drivers/net/ethernet/lantiq_xrx200.c
> b/drivers/net/ethernet/lantiq_xrx200.c
> index d29104d..cda641e 100644
> --- a/drivers/net/ethernet/lantiq_xrx200.c
> +++ b/drivers/net/ethernet/lantiq_xrx200.c
> @@ -478,7 +478,7 @@ static int xrx200_probe(struct platform_device
> *pdev)
> }
>
> mac = of_get_mac_address(np);
> - if (mac && is_valid_ether_addr(mac))
> + if (!IS_ERR(mac))
> ether_addr_copy(net_dev->dev_addr, mac);
> else
> eth_hw_addr_random(net_dev); diff --git
> a/drivers/net/ethernet/marvell/mv643xx_eth.c
> b/drivers/net/ethernet/marvell/mv643xx_eth.c
> index 292a668..07e254f 100644
> --- a/drivers/net/ethernet/marvell/mv643xx_eth.c
> +++ b/drivers/net/ethernet/marvell/mv643xx_eth.c
> @@ -2749,7 +2749,7 @@ static int mv643xx_eth_shared_of_add_port(struct
> platform_device *pdev,
> }
>
> mac_addr = of_get_mac_address(pnp);
> - if (mac_addr)
> + if (!IS_ERR(mac_addr))
> memcpy(ppd.mac_addr, mac_addr, ETH_ALEN);
>
> mv643xx_eth_property(pnp, "tx-queue-size", ppd.tx_queue_size);
> diff --git a/drivers/net/ethernet/marvell/mvneta.c
> b/drivers/net/ethernet/marvell/mvneta.c
> index a715277..8186135 100644
> --- a/drivers/net/ethernet/marvell/mvneta.c
> +++ b/drivers/net/ethernet/marvell/mvneta.c
> @@ -4563,7 +4563,7 @@ static int mvneta_probe(struct platform_device
> *pdev)
> }
>
> dt_mac_addr = of_get_mac_address(dn);
> - if (dt_mac_addr) {
> + if (!IS_ERR(dt_mac_addr)) {
> mac_from = "device tree";
> memcpy(dev->dev_addr, dt_mac_addr, ETH_ALEN);
> } else {
> diff --git a/drivers/net/ethernet/marvell/pxa168_eth.c
> b/drivers/net/ethernet/marvell/pxa168_eth.c
> index 35f2142..ce037e8 100644
> --- a/drivers/net/ethernet/marvell/pxa168_eth.c
> +++ b/drivers/net/ethernet/marvell/pxa168_eth.c
> @@ -1461,7 +1461,7 @@ static int pxa168_eth_probe(struct
> platform_device *pdev)
> if (pdev->dev.of_node)
> mac_addr = of_get_mac_address(pdev->dev.of_node);
>
> - if (mac_addr && is_valid_ether_addr(mac_addr)) {
> + if (!IS_ERR_OR_NULL(mac_addr)) {
> ether_addr_copy(dev->dev_addr, mac_addr);
> } else {
> /* try reading the mac address, if set by the bootloader */
> diff --git a/drivers/net/ethernet/marvell/sky2.c
> b/drivers/net/ethernet/marvell/sky2.c
> index 8b3495e..c4050ec 100644
> --- a/drivers/net/ethernet/marvell/sky2.c
> +++ b/drivers/net/ethernet/marvell/sky2.c
> @@ -4808,7 +4808,7 @@ static struct net_device *sky2_init_netdev(struct
> sky2_hw *hw, unsigned port,
> * 2) from internal registers set by bootloader
> */
> iap = of_get_mac_address(hw->pdev->dev.of_node);
> - if (iap)
> + if (!IS_ERR(iap))
> memcpy(dev->dev_addr, iap, ETH_ALEN);
> else
> memcpy_fromio(dev->dev_addr, hw->regs + B2_MAC_1 +
> port * 8, diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
> b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
> index 53abe92..f9fbb3f 100644
> --- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
> +++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
> @@ -2028,7 +2028,7 @@ static int __init mtk_init(struct net_device *dev)
> const char *mac_addr;
>
> mac_addr = of_get_mac_address(mac->of_node);
> - if (mac_addr)
> + if (!IS_ERR(mac_addr))
> ether_addr_copy(dev->dev_addr, mac_addr);
>
> /* If the mac address is invalid, use random mac address */ diff
> --git a/drivers/net/ethernet/micrel/ks8851.c
> b/drivers/net/ethernet/micrel/ks8851.c
> index 7849119..b44172a 100644
> --- a/drivers/net/ethernet/micrel/ks8851.c
> +++ b/drivers/net/ethernet/micrel/ks8851.c
> @@ -425,7 +425,7 @@ static void ks8851_init_mac(struct ks8851_net *ks)
> const u8 *mac_addr;
>
> mac_addr = of_get_mac_address(ks->spidev->dev.of_node);
> - if (mac_addr) {
> + if (!IS_ERR(mac_addr)) {
> memcpy(dev->dev_addr, mac_addr, ETH_ALEN);
> ks8851_write_mac_addr(dev);
> return;
> diff --git a/drivers/net/ethernet/micrel/ks8851_mll.c
> b/drivers/net/ethernet/micrel/ks8851_mll.c
> index c946841..dc76b0d 100644
> --- a/drivers/net/ethernet/micrel/ks8851_mll.c
> +++ b/drivers/net/ethernet/micrel/ks8851_mll.c
> @@ -1327,7 +1327,7 @@ static int ks8851_probe(struct platform_device
> *pdev)
> /* overwriting the default MAC address */
> if (pdev->dev.of_node) {
> mac = of_get_mac_address(pdev->dev.of_node);
> - if (mac)
> + if (!IS_ERR(mac))
> memcpy(ks->mac_addr, mac, ETH_ALEN);
> } else {
> struct ks8851_mll_platform_data *pdata; diff --git
> a/drivers/net/ethernet/nxp/lpc_eth.c b/drivers/net/ethernet/nxp/lpc_eth.c
> index 89d1739..da138ed 100644
> --- a/drivers/net/ethernet/nxp/lpc_eth.c
> +++ b/drivers/net/ethernet/nxp/lpc_eth.c
> @@ -1368,7 +1368,7 @@ static int lpc_eth_drv_probe(struct
> platform_device *pdev)
>
> if (!is_valid_ether_addr(ndev->dev_addr)) {
> const char *macaddr = of_get_mac_address(np);
> - if (macaddr)
> + if (!IS_ERR(macaddr))
> memcpy(ndev->dev_addr, macaddr,
> ETH_ALEN);
> }
> if (!is_valid_ether_addr(ndev->dev_addr))
> diff --git a/drivers/net/ethernet/qualcomm/qca_spi.c
> b/drivers/net/ethernet/qualcomm/qca_spi.c
> index 97f9295..b28360b 100644
> --- a/drivers/net/ethernet/qualcomm/qca_spi.c
> +++ b/drivers/net/ethernet/qualcomm/qca_spi.c
> @@ -966,7 +966,7 @@
>
> mac = of_get_mac_address(spi->dev.of_node);
>
> - if (mac)
> + if (!IS_ERR(mac))
> ether_addr_copy(qca->net_dev->dev_addr, mac);
>
> if (!is_valid_ether_addr(qca->net_dev->dev_addr)) { diff --git
> a/drivers/net/ethernet/qualcomm/qca_uart.c
> b/drivers/net/ethernet/qualcomm/qca_uart.c
> index db6068c..5906168 100644
> --- a/drivers/net/ethernet/qualcomm/qca_uart.c
> +++ b/drivers/net/ethernet/qualcomm/qca_uart.c
> @@ -351,7 +351,7 @@ static int qca_uart_probe(struct serdev_device
> *serdev)
>
> mac = of_get_mac_address(serdev->dev.of_node);
>
> - if (mac)
> + if (!IS_ERR(mac))
> ether_addr_copy(qca->net_dev->dev_addr, mac);
>
> if (!is_valid_ether_addr(qca->net_dev->dev_addr)) { diff --git
> a/drivers/net/ethernet/renesas/ravb_main.c
> b/drivers/net/ethernet/renesas/ravb_main.c
> index 9618c48..d3ffcf5 100644
> --- a/drivers/net/ethernet/renesas/ravb_main.c
> +++ b/drivers/net/ethernet/renesas/ravb_main.c
> @@ -111,7 +111,7 @@ static void ravb_set_buffer_align(struct sk_buff *skb)
> */
> static void ravb_read_mac_address(struct net_device *ndev, const u8 *mac)
> {
> - if (mac) {
> + if (!IS_ERR(mac)) {
> ether_addr_copy(ndev->dev_addr, mac);
> } else {
> u32 mahr = ravb_read(ndev, MAHR); diff --git
> a/drivers/net/ethernet/renesas/sh_eth.c
> b/drivers/net/ethernet/renesas/sh_eth.c
> index e33af37..4d4be66 100644
> --- a/drivers/net/ethernet/renesas/sh_eth.c
> +++ b/drivers/net/ethernet/renesas/sh_eth.c
> @@ -3193,7 +3193,7 @@ static struct sh_eth_plat_data
> *sh_eth_parse_dt(struct device *dev)
> pdata->phy_interface = ret;
>
> mac_addr = of_get_mac_address(np);
> - if (mac_addr)
> + if (!IS_ERR(mac_addr))
> memcpy(pdata->mac_addr, mac_addr, ETH_ALEN);
>
> pdata->no_ether_link =
> diff --git a/drivers/net/ethernet/samsung/sxgbe/sxgbe_platform.c
> b/drivers/net/ethernet/samsung/sxgbe/sxgbe_platform.c
> index fbd00cb..d2bc941 100644
> --- a/drivers/net/ethernet/samsung/sxgbe/sxgbe_platform.c
> +++ b/drivers/net/ethernet/samsung/sxgbe/sxgbe_platform.c
> @@ -124,7 +124,7 @@ static int sxgbe_platform_probe(struct
> platform_device *pdev)
> }
>
> /* Get MAC address if available (DT) */
> - if (mac)
> + if (!IS_ERR_OR_NULL(mac))
> ether_addr_copy(priv->dev->dev_addr, mac);
>
> /* Get the TX/RX IRQ numbers */
> diff --git a/drivers/net/ethernet/socionext/sni_ave.c
> b/drivers/net/ethernet/socionext/sni_ave.c
> index bb6d5fb..51a7b48 100644
> --- a/drivers/net/ethernet/socionext/sni_ave.c
> +++ b/drivers/net/ethernet/socionext/sni_ave.c
> @@ -1599,7 +1599,7 @@ static int ave_probe(struct platform_device *pdev)
> ndev->max_mtu = AVE_MAX_ETHFRAME - (ETH_HLEN +
> ETH_FCS_LEN);
>
> mac_addr = of_get_mac_address(np);
> - if (mac_addr)
> + if (!IS_ERR(mac_addr))
> ether_addr_copy(ndev->dev_addr, mac_addr);
>
> /* if the mac address is invalid, use random mac address */ diff --git
> a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
> b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
> index 5ab2733..5678b86 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
> +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
> @@ -4262,7 +4262,7 @@ int stmmac_dvr_probe(struct device *device,
> priv->wol_irq = res->wol_irq;
> priv->lpi_irq = res->lpi_irq;
>
> - if (res->mac)
> + if (!IS_ERR_OR_NULL(res->mac))
> memcpy(priv->dev->dev_addr, res->mac, ETH_ALEN);
>
> dev_set_drvdata(device, priv->dev); diff --git
> a/drivers/net/ethernet/ti/cpsw.c b/drivers/net/ethernet/ti/cpsw.c index
> e376806..b18eeb0 100644
> --- a/drivers/net/ethernet/ti/cpsw.c
> +++ b/drivers/net/ethernet/ti/cpsw.c
> @@ -2232,7 +2232,7 @@ static int cpsw_probe_dt(struct
> cpsw_platform_data *data,
>
> no_phy_slave:
> mac_addr = of_get_mac_address(slave_node);
> - if (mac_addr) {
> + if (!IS_ERR(mac_addr)) {
> memcpy(slave_data->mac_addr, mac_addr,
> ETH_ALEN);
> } else {
> ret = ti_cm_get_macid(&pdev->dev, i, diff --git
> a/drivers/net/ethernet/ti/netcp_core.c
> b/drivers/net/ethernet/ti/netcp_core.c
> index 01d4ca3..6428439 100644
> --- a/drivers/net/ethernet/ti/netcp_core.c
> +++ b/drivers/net/ethernet/ti/netcp_core.c
> @@ -2037,7 +2037,7 @@ static int netcp_create_interface(struct
> netcp_device *netcp_device,
> devm_release_mem_region(dev, res.start, size);
> } else {
> mac_addr = of_get_mac_address(node_interface);
> - if (mac_addr)
> + if (!IS_ERR(mac_addr))
> ether_addr_copy(ndev->dev_addr, mac_addr);
> else
> eth_random_addr(ndev->dev_addr); diff --git
> a/drivers/net/ethernet/wiznet/w5100.c
> b/drivers/net/ethernet/wiznet/w5100.c
> index d8ba512..b0052933 100644
> --- a/drivers/net/ethernet/wiznet/w5100.c
> +++ b/drivers/net/ethernet/wiznet/w5100.c
> @@ -1164,7 +1164,7 @@ int w5100_probe(struct device *dev, const struct
> w5100_ops *ops,
> INIT_WORK(&priv->setrx_work, w5100_setrx_work);
> INIT_WORK(&priv->restart_work, w5100_restart_work);
>
> - if (mac_addr)
> + if (!IS_ERR_OR_NULL(mac_addr))
> memcpy(ndev->dev_addr, mac_addr, ETH_ALEN);
> else
> eth_hw_addr_random(ndev); diff --git
> a/drivers/net/ethernet/xilinx/ll_temac_main.c
> b/drivers/net/ethernet/xilinx/ll_temac_main.c
> index 9851991..f389a81 100644
> --- a/drivers/net/ethernet/xilinx/ll_temac_main.c
> +++ b/drivers/net/ethernet/xilinx/ll_temac_main.c
> @@ -1252,7 +1252,7 @@ static int temac_probe(struct platform_device
> *pdev)
> if (temac_np) {
> /* Retrieve the MAC address */
> addr = of_get_mac_address(temac_np);
> - if (!addr) {
> + if (IS_ERR(addr)) {
> dev_err(&pdev->dev, "could not find MAC
> address\n");
> return -ENODEV;
> }
> diff --git a/drivers/net/ethernet/xilinx/xilinx_axienet_main.c
> b/drivers/net/ethernet/xilinx/xilinx_axienet_main.c
> index 4041c75..108fbc7 100644
> --- a/drivers/net/ethernet/xilinx/xilinx_axienet_main.c
> +++ b/drivers/net/ethernet/xilinx/xilinx_axienet_main.c
> @@ -1596,7 +1596,7 @@ static int axienet_probe(struct platform_device
> *pdev)
>
> /* Retrieve the MAC address */
> mac_addr = of_get_mac_address(pdev->dev.of_node);
> - if (!mac_addr) {
> + if (IS_ERR(mac_addr)) {
> dev_err(&pdev->dev, "could not find MAC address\n");
> goto free_netdev;
> }
> diff --git a/drivers/net/ethernet/xilinx/xilinx_emaclite.c
> b/drivers/net/ethernet/xilinx/xilinx_emaclite.c
> index fc38692..6911707 100644
> --- a/drivers/net/ethernet/xilinx/xilinx_emaclite.c
> +++ b/drivers/net/ethernet/xilinx/xilinx_emaclite.c
> @@ -1165,7 +1165,7 @@ static int xemaclite_of_probe(struct
> platform_device *ofdev)
> lp->rx_ping_pong = get_bool(ofdev, "xlnx,rx-ping-pong");
> mac_address = of_get_mac_address(ofdev->dev.of_node);
>
> - if (mac_address) {
> + if (!IS_ERR(mac_address)) {
> /* Set the MAC address. */
> memcpy(ndev->dev_addr, mac_address, ETH_ALEN);
> } else {
> diff --git a/net/ethernet/eth.c b/net/ethernet/eth.c index fddcee3..4b2b222
> 100644
> --- a/net/ethernet/eth.c
> +++ b/net/ethernet/eth.c
> @@ -560,7 +560,7 @@ int eth_platform_get_mac_address(struct device
> *dev, u8 *mac_addr)
> addr = NULL;
> if (dp)
> addr = of_get_mac_address(dp);
> - if (!addr)
> + if (IS_ERR_OR_NULL(addr))
> addr = arch_get_platform_mac_address();
>
> if (!addr)
> --
> 1.9.1
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