From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sergei Shtylyov Date: Sat, 27 Apr 2013 22:48:11 +0000 Subject: [PATCH] sh_eth: use random MAC address if no valid one supplied Message-Id: <201304280248.11893.sergei.shtylyov@cogentembedded.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: netdev@vger.kernel.org Cc: nobuhiro.iwamatsu.yj@renesas.com, linux-sh@vger.kernel.org On Renesas R-Car based development boards, although a MAC address is printed on all the Ethernet port labels, U-Boot doesn't write a valid MAC address to the Ether MAHR/MALR registers (there's no storage provided for the Ether MAC address either), so we have to resort to using a random MAC address... Signed-off-by: Sergei Shtylyov --- This patch is against the 'net-next.git' repository. drivers/net/ethernet/renesas/sh_eth.c | 5 +++++ 1 file changed, 5 insertions(+) Index: net-next/drivers/net/ethernet/renesas/sh_eth.c =================================--- net-next.orig/drivers/net/ethernet/renesas/sh_eth.c +++ net-next/drivers/net/ethernet/renesas/sh_eth.c @@ -2735,6 +2735,11 @@ static int sh_eth_drv_probe(struct platf /* read and set MAC address */ read_mac_address(ndev, pd->mac_addr); + if (!is_valid_ether_addr(ndev->dev_addr)) { + dev_warn(&pdev->dev, "no valid MAC address supplied, using " + "a random one.\n"); + eth_hw_addr_random(ndev); + } /* ioremap the TSU registers */ if (mdp->cd->tsu) {