From 2d2924af96881f3300239156d6ff316a1a3e48e5 Mon Sep 17 00:00:00 2001 From: Petr Štetiar Date: Fri, 10 May 2019 11:35:17 +0200 Subject: net: ethernet: fix similar warning reported by kbuild test robot MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This patch fixes following (similar) warning reported by kbuild test robot: In function ‘memcpy’, inlined from ‘smsc75xx_init_mac_address’ at drivers/net/usb/smsc75xx.c:778:3, inlined from ‘smsc75xx_bind’ at drivers/net/usb/smsc75xx.c:1501:2: ./include/linux/string.h:355:9: warning: argument 2 null where non-null expected [-Wnonnull] return __builtin_memcpy(p, q, size); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/net/usb/smsc75xx.c: In function ‘smsc75xx_bind’: ./include/linux/string.h:355:9: note: in a call to built-in function ‘__builtin_memcpy’ I've replaced the offending memcpy with ether_addr_copy, because I'm 100% sure, that of_get_mac_address can't return NULL as it returns valid pointer or ERR_PTR encoded value, nothing else. I'm hesitant to just change IS_ERR into IS_ERR_OR_NULL check, as this would make the warning disappear also, but it would be confusing to check for impossible return value just to make a compiler happy. I'm now changing all occurencies of memcpy to ether_addr_copy after the of_get_mac_address call, as it's very likely, that we're going to get similar reports from kbuild test robot in the future. Fixes: a51645f70f63 ("net: ethernet: support of_get_mac_address new ERR_PTR error") Reported-by: kbuild test robot Signed-off-by: Petr Štetiar Signed-off-by: David S. Miller --- drivers/net/ethernet/marvell/mv643xx_eth.c | 2 +- drivers/net/ethernet/marvell/mvneta.c | 2 +- drivers/net/ethernet/marvell/sky2.c | 2 +- 3 files changed, 3 insertions(+), 3 deletions(-) (limited to 'drivers/net/ethernet/marvell') diff --git a/drivers/net/ethernet/marvell/mv643xx_eth.c b/drivers/net/ethernet/marvell/mv643xx_eth.c index 07e254fc96ef..409b69fd4374 100644 --- a/drivers/net/ethernet/marvell/mv643xx_eth.c +++ b/drivers/net/ethernet/marvell/mv643xx_eth.c @@ -2750,7 +2750,7 @@ static int mv643xx_eth_shared_of_add_port(struct platform_device *pdev, mac_addr = of_get_mac_address(pnp); if (!IS_ERR(mac_addr)) - memcpy(ppd.mac_addr, mac_addr, ETH_ALEN); + ether_addr_copy(ppd.mac_addr, mac_addr); mv643xx_eth_property(pnp, "tx-queue-size", ppd.tx_queue_size); mv643xx_eth_property(pnp, "tx-sram-addr", ppd.tx_sram_addr); diff --git a/drivers/net/ethernet/marvell/mvneta.c b/drivers/net/ethernet/marvell/mvneta.c index 8186135883ed..e758650b2c26 100644 --- a/drivers/net/ethernet/marvell/mvneta.c +++ b/drivers/net/ethernet/marvell/mvneta.c @@ -4565,7 +4565,7 @@ static int mvneta_probe(struct platform_device *pdev) dt_mac_addr = of_get_mac_address(dn); if (!IS_ERR(dt_mac_addr)) { mac_from = "device tree"; - memcpy(dev->dev_addr, dt_mac_addr, ETH_ALEN); + ether_addr_copy(dev->dev_addr, dt_mac_addr); } else { mvneta_get_mac_addr(pp, hw_mac_addr); if (is_valid_ether_addr(hw_mac_addr)) { diff --git a/drivers/net/ethernet/marvell/sky2.c b/drivers/net/ethernet/marvell/sky2.c index 9d070cca3e9e..5adf307fbbfd 100644 --- a/drivers/net/ethernet/marvell/sky2.c +++ b/drivers/net/ethernet/marvell/sky2.c @@ -4805,7 +4805,7 @@ static struct net_device *sky2_init_netdev(struct sky2_hw *hw, unsigned port, */ iap = of_get_mac_address(hw->pdev->dev.of_node); if (!IS_ERR(iap)) - memcpy(dev->dev_addr, iap, ETH_ALEN); + ether_addr_copy(dev->dev_addr, iap); else memcpy_fromio(dev->dev_addr, hw->regs + B2_MAC_1 + port * 8, ETH_ALEN); -- cgit v1.2.3-59-g8ed1b