From: Kristian Evensen Date: Thu, 14 Jul 2016 08:23:03 +0000 (+0200) Subject: rndis_host: Set valid random MAC on buggy devices X-Git-Tag: v5.15~13202^2~91 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=a5a18bdf7453d505783e40e47ebb84bfdd35f93b;p=platform%2Fkernel%2Flinux-starfive.git rndis_host: Set valid random MAC on buggy devices Some devices of the same type all export the same, random MAC address. This behavior has been seen on the ZTE MF910, MF823 and MF831, and there are probably more devices out there. Fix this by generating a valid random MAC address if we read a random MAC from device. Also, changed the memcpy() to ether_addr_copy(), as pointed out by checkpatch. Suggested-by: Bjørn Mork Signed-off-by: Kristian Evensen Signed-off-by: David S. Miller --- diff --git a/drivers/net/usb/rndis_host.c b/drivers/net/usb/rndis_host.c index 524a47a281..4f4f71b 100644 --- a/drivers/net/usb/rndis_host.c +++ b/drivers/net/usb/rndis_host.c @@ -428,7 +428,11 @@ generic_rndis_bind(struct usbnet *dev, struct usb_interface *intf, int flags) dev_err(&intf->dev, "rndis get ethaddr, %d\n", retval); goto halt_fail_and_release; } - memcpy(net->dev_addr, bp, ETH_ALEN); + + if (bp[0] & 0x02) + eth_hw_addr_random(net); + else + ether_addr_copy(net->dev_addr, bp); /* set a nonzero filter to enable data transfers */ memset(u.set, 0, sizeof *u.set);