From 5503a6889f72d91c9ad156e6daa9ffcdc726ddc5 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Petr=20=C5=A0tetiar?= Date: Mon, 6 May 2019 23:24:47 +0200 Subject: net: usb: smsc: fix 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 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. Fixes: adfb3cb2c52e ("net: usb: support of_get_mac_address new ERR_PTR error") Reported-by: kbuild test robot Signed-off-by: Petr Štetiar Reviewed-by: Woojung Huh Signed-off-by: David S. Miller --- drivers/net/usb/smsc75xx.c | 2 +- drivers/net/usb/smsc95xx.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) (limited to 'drivers/net') diff --git a/drivers/net/usb/smsc75xx.c b/drivers/net/usb/smsc75xx.c index d27b627b4317..e4c2f3afce60 100644 --- a/drivers/net/usb/smsc75xx.c +++ b/drivers/net/usb/smsc75xx.c @@ -775,7 +775,7 @@ static void smsc75xx_init_mac_address(struct usbnet *dev) /* maybe the boot loader passed the MAC address in devicetree */ mac_addr = of_get_mac_address(dev->udev->dev.of_node); if (!IS_ERR(mac_addr)) { - memcpy(dev->net->dev_addr, mac_addr, ETH_ALEN); + ether_addr_copy(dev->net->dev_addr, mac_addr); return; } diff --git a/drivers/net/usb/smsc95xx.c b/drivers/net/usb/smsc95xx.c index ab239113351d..a0e119907c84 100644 --- a/drivers/net/usb/smsc95xx.c +++ b/drivers/net/usb/smsc95xx.c @@ -918,7 +918,7 @@ static void smsc95xx_init_mac_address(struct usbnet *dev) /* maybe the boot loader passed the MAC address in devicetree */ mac_addr = of_get_mac_address(dev->udev->dev.of_node); if (!IS_ERR(mac_addr)) { - memcpy(dev->net->dev_addr, mac_addr, ETH_ALEN); + ether_addr_copy(dev->net->dev_addr, mac_addr); return; } -- cgit v1.2.3