From: Jakub Kicinski Date: Thu, 7 Oct 2021 01:06:58 +0000 (-0700) Subject: eth: fwnode: change the return type of mac address helpers X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=8017c4d8173cfe086420dc5710d631cabd03ef67;p=linux.git eth: fwnode: change the return type of mac address helpers fwnode_get_mac_address() and device_get_mac_address() return a pointer to the buffer that was passed to them on success or NULL on failure. None of the callers care about the actual value, only if it's NULL or not. These semantics differ from of_get_mac_address() which returns an int so to avoid confusion make the device helpers return an errno. Signed-off-by: Jakub Kicinski Signed-off-by: David S. Miller --- diff --git a/drivers/net/ethernet/apm/xgene-v2/main.c b/drivers/net/ethernet/apm/xgene-v2/main.c index 80399c8980bd3..c7253ecc0fa5b 100644 --- a/drivers/net/ethernet/apm/xgene-v2/main.c +++ b/drivers/net/ethernet/apm/xgene-v2/main.c @@ -36,7 +36,7 @@ static int xge_get_resources(struct xge_pdata *pdata) return -ENOMEM; } - if (!device_get_mac_address(dev, ndev->dev_addr, ETH_ALEN)) + if (device_get_mac_address(dev, ndev->dev_addr, ETH_ALEN)) eth_hw_addr_random(ndev); memcpy(ndev->perm_addr, ndev->dev_addr, ndev->addr_len); diff --git a/drivers/net/ethernet/apm/xgene/xgene_enet_main.c b/drivers/net/ethernet/apm/xgene/xgene_enet_main.c index 5f1fc6582d74a..268e099aa5e16 100644 --- a/drivers/net/ethernet/apm/xgene/xgene_enet_main.c +++ b/drivers/net/ethernet/apm/xgene/xgene_enet_main.c @@ -1731,7 +1731,7 @@ static int xgene_enet_get_resources(struct xgene_enet_pdata *pdata) xgene_get_port_id_acpi(dev, pdata); #endif - if (!device_get_mac_address(dev, ndev->dev_addr, ETH_ALEN)) + if (device_get_mac_address(dev, ndev->dev_addr, ETH_ALEN)) eth_hw_addr_random(ndev); memcpy(ndev->perm_addr, ndev->dev_addr, ndev->addr_len); diff --git a/drivers/net/ethernet/broadcom/genet/bcmgenet.c b/drivers/net/ethernet/broadcom/genet/bcmgenet.c index 02fe98cbabb03..30c5dcaea802b 100644 --- a/drivers/net/ethernet/broadcom/genet/bcmgenet.c +++ b/drivers/net/ethernet/broadcom/genet/bcmgenet.c @@ -4084,7 +4084,7 @@ static int bcmgenet_probe(struct platform_device *pdev) if (pd && !IS_ERR_OR_NULL(pd->mac_address)) eth_hw_addr_set(dev, pd->mac_address); else - if (!device_get_mac_address(&pdev->dev, dev->dev_addr, ETH_ALEN)) + if (device_get_mac_address(&pdev->dev, dev->dev_addr, ETH_ALEN)) if (has_acpi_companion(&pdev->dev)) bcmgenet_get_hw_addr(priv, dev->dev_addr); diff --git a/drivers/net/ethernet/cavium/thunder/thunder_bgx.c b/drivers/net/ethernet/cavium/thunder/thunder_bgx.c index db66d4beb28af..77ce81633cdca 100644 --- a/drivers/net/ethernet/cavium/thunder/thunder_bgx.c +++ b/drivers/net/ethernet/cavium/thunder/thunder_bgx.c @@ -1387,10 +1387,10 @@ static int acpi_get_mac_address(struct device *dev, struct acpi_device *adev, u8 *dst) { u8 mac[ETH_ALEN]; - u8 *addr; + int ret; - addr = fwnode_get_mac_address(acpi_fwnode_handle(adev), mac, ETH_ALEN); - if (!addr) { + ret = fwnode_get_mac_address(acpi_fwnode_handle(adev), mac, ETH_ALEN); + if (ret) { dev_err(dev, "MAC address invalid: %pM\n", mac); return -EINVAL; } diff --git a/drivers/net/ethernet/faraday/ftgmac100.c b/drivers/net/ethernet/faraday/ftgmac100.c index ab92672255736..8de9c99a18fb4 100644 --- a/drivers/net/ethernet/faraday/ftgmac100.c +++ b/drivers/net/ethernet/faraday/ftgmac100.c @@ -182,10 +182,8 @@ static void ftgmac100_initial_mac(struct ftgmac100 *priv) u8 mac[ETH_ALEN]; unsigned int m; unsigned int l; - void *addr; - addr = device_get_mac_address(priv->dev, mac, ETH_ALEN); - if (addr) { + if (!device_get_mac_address(priv->dev, mac, ETH_ALEN)) { eth_hw_addr_set(priv->netdev, mac); dev_info(priv->dev, "Read MAC address %pM from device tree\n", mac); diff --git a/drivers/net/ethernet/hisilicon/hns/hns_enet.c b/drivers/net/ethernet/hisilicon/hns/hns_enet.c index 2c4801e49aa1b..12b916399ba7b 100644 --- a/drivers/net/ethernet/hisilicon/hns/hns_enet.c +++ b/drivers/net/ethernet/hisilicon/hns/hns_enet.c @@ -1212,7 +1212,7 @@ static void hns_init_mac_addr(struct net_device *ndev) { struct hns_nic_priv *priv = netdev_priv(ndev); - if (!device_get_mac_address(priv->dev, ndev->dev_addr, ETH_ALEN)) { + if (device_get_mac_address(priv->dev, ndev->dev_addr, ETH_ALEN)) { eth_hw_addr_random(ndev); dev_warn(priv->dev, "No valid mac, use random mac %pM", ndev->dev_addr); diff --git a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c index 3197526455d9d..b84f8b6fe9f42 100644 --- a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c +++ b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c @@ -6081,7 +6081,7 @@ static void mvpp2_port_copy_mac_addr(struct net_device *dev, struct mvpp2 *priv, char hw_mac_addr[ETH_ALEN] = {0}; char fw_mac_addr[ETH_ALEN]; - if (fwnode_get_mac_address(fwnode, fw_mac_addr, ETH_ALEN)) { + if (!fwnode_get_mac_address(fwnode, fw_mac_addr, ETH_ALEN)) { *mac_from = "firmware node"; eth_hw_addr_set(dev, fw_mac_addr); return; diff --git a/drivers/net/ethernet/microchip/enc28j60.c b/drivers/net/ethernet/microchip/enc28j60.c index bf77e8adffbf3..fa62311d326ad 100644 --- a/drivers/net/ethernet/microchip/enc28j60.c +++ b/drivers/net/ethernet/microchip/enc28j60.c @@ -1572,7 +1572,7 @@ static int enc28j60_probe(struct spi_device *spi) goto error_irq; } - if (device_get_mac_address(&spi->dev, macaddr, sizeof(macaddr))) + if (!device_get_mac_address(&spi->dev, macaddr, sizeof(macaddr))) eth_hw_addr_set(dev, macaddr); else eth_hw_addr_random(dev); diff --git a/drivers/net/ethernet/qualcomm/emac/emac.c b/drivers/net/ethernet/qualcomm/emac/emac.c index fbfabfc5cc510..2e913508fbeb5 100644 --- a/drivers/net/ethernet/qualcomm/emac/emac.c +++ b/drivers/net/ethernet/qualcomm/emac/emac.c @@ -549,7 +549,7 @@ static int emac_probe_resources(struct platform_device *pdev, int ret = 0; /* get mac address */ - if (device_get_mac_address(&pdev->dev, maddr, ETH_ALEN)) + if (!device_get_mac_address(&pdev->dev, maddr, ETH_ALEN)) eth_hw_addr_set(netdev, maddr); else eth_hw_addr_random(netdev); diff --git a/drivers/net/ethernet/socionext/netsec.c b/drivers/net/ethernet/socionext/netsec.c index c7e56dc0a4949..f8dd7fa5f632a 100644 --- a/drivers/net/ethernet/socionext/netsec.c +++ b/drivers/net/ethernet/socionext/netsec.c @@ -1978,10 +1978,10 @@ static int netsec_register_mdio(struct netsec_priv *priv, u32 phy_addr) static int netsec_probe(struct platform_device *pdev) { struct resource *mmio_res, *eeprom_res, *irq_res; - u8 *mac, macbuf[ETH_ALEN]; struct netsec_priv *priv; u32 hw_ver, phy_addr = 0; struct net_device *ndev; + u8 macbuf[ETH_ALEN]; int ret; mmio_res = platform_get_resource(pdev, IORESOURCE_MEM, 0); @@ -2034,12 +2034,12 @@ static int netsec_probe(struct platform_device *pdev) goto free_ndev; } - mac = device_get_mac_address(&pdev->dev, macbuf, sizeof(macbuf)); - if (mac) - eth_hw_addr_set(ndev, mac); + ret = device_get_mac_address(&pdev->dev, macbuf, sizeof(macbuf)); + if (!ret) + eth_hw_addr_set(ndev, macbuf); if (priv->eeprom_base && - (!mac || !is_valid_ether_addr(ndev->dev_addr))) { + (ret || !is_valid_ether_addr(ndev->dev_addr))) { void __iomem *macp = priv->eeprom_base + NETSEC_EEPROM_MAC_ADDRESS; diff --git a/include/linux/etherdevice.h b/include/linux/etherdevice.h index 39f0758274aef..8299f1cd91758 100644 --- a/include/linux/etherdevice.h +++ b/include/linux/etherdevice.h @@ -31,9 +31,8 @@ struct fwnode_handle; int eth_platform_get_mac_address(struct device *dev, u8 *mac_addr); unsigned char *arch_get_platform_mac_address(void); int nvmem_get_mac_address(struct device *dev, void *addrbuf); -void *device_get_mac_address(struct device *dev, char *addr, int alen); -void *fwnode_get_mac_address(struct fwnode_handle *fwnode, - char *addr, int alen); +int device_get_mac_address(struct device *dev, char *addr, int alen); +int fwnode_get_mac_address(struct fwnode_handle *fwnode, char *addr, int alen); u32 eth_get_headlen(const struct net_device *dev, const void *data, u32 len); __be16 eth_type_trans(struct sk_buff *skb, struct net_device *dev); diff --git a/net/ethernet/eth.c b/net/ethernet/eth.c index 9ea45aae04ee4..70692f5b514c6 100644 --- a/net/ethernet/eth.c +++ b/net/ethernet/eth.c @@ -560,15 +560,21 @@ int nvmem_get_mac_address(struct device *dev, void *addrbuf) } EXPORT_SYMBOL(nvmem_get_mac_address); -static void *fwnode_get_mac_addr(struct fwnode_handle *fwnode, - const char *name, char *addr, - int alen) +static int fwnode_get_mac_addr(struct fwnode_handle *fwnode, + const char *name, char *addr, int alen) { - int ret = fwnode_property_read_u8_array(fwnode, name, addr, alen); + int ret; - if (ret == 0 && alen == ETH_ALEN && is_valid_ether_addr(addr)) - return addr; - return NULL; + if (alen != ETH_ALEN) + return -EINVAL; + + ret = fwnode_property_read_u8_array(fwnode, name, addr, alen); + if (ret) + return ret; + + if (!is_valid_ether_addr(addr)) + return -EINVAL; + return 0; } /** @@ -594,19 +600,14 @@ static void *fwnode_get_mac_addr(struct fwnode_handle *fwnode, * In this case, the real MAC is in 'local-mac-address', and 'mac-address' * exists but is all zeros. */ -void *fwnode_get_mac_address(struct fwnode_handle *fwnode, char *addr, int alen) +int fwnode_get_mac_address(struct fwnode_handle *fwnode, char *addr, int alen) { - char *res; - - res = fwnode_get_mac_addr(fwnode, "mac-address", addr, alen); - if (res) - return res; - - res = fwnode_get_mac_addr(fwnode, "local-mac-address", addr, alen); - if (res) - return res; + if (!fwnode_get_mac_addr(fwnode, "mac-address", addr, alen) || + !fwnode_get_mac_addr(fwnode, "local-mac-address", addr, alen) || + !fwnode_get_mac_addr(fwnode, "address", addr, alen)) + return 0; - return fwnode_get_mac_addr(fwnode, "address", addr, alen); + return -ENOENT; } EXPORT_SYMBOL(fwnode_get_mac_address); @@ -616,7 +617,7 @@ EXPORT_SYMBOL(fwnode_get_mac_address); * @addr: Address of buffer to store the MAC in * @alen: Length of the buffer pointed to by addr, should be ETH_ALEN */ -void *device_get_mac_address(struct device *dev, char *addr, int alen) +int device_get_mac_address(struct device *dev, char *addr, int alen) { return fwnode_get_mac_address(dev_fwnode(dev), addr, alen); }