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Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Kurt Kanzenbach , Woojung Huh , UNGLinuxDriver@microchip.com (maintainer:MICROCHIP KSZ SERIES ETHERNET SWITCH DRIVER), =?UTF-8?q?Cl=C3=A9ment=20L=C3=A9ger?= , George McCollister , Richard Cochran , Rosen Penev , Simon Horman , Jacob Keller , =?UTF-8?q?Uwe=20Kleine-K=C3=B6nig?= , Breno Leitao , linux-kernel@vger.kernel.org (open list), linux-renesas-soc@vger.kernel.org (open list:RENESAS RZ/N1 A5PSW SWITCH DRIVER) Subject: [PATCHv7 net-next 6/6] net: ibm: emac: generate random MAC if not found Date: Tue, 15 Oct 2024 13:02:21 -0700 Message-ID: <20241015200222.12452-8-rosenp@gmail.com> X-Mailer: git-send-email 2.47.0 In-Reply-To: <20241015200222.12452-1-rosenp@gmail.com> References: <20241015200222.12452-1-rosenp@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" On this Cisco MX60W, u-boot sets the local-mac-address property. Unfortunately by default, the MAC is wrong and is actually located on a UBI partition. Which means nvmem needs to be used to grab it. In the case where that fails, EMAC fails to initialize instead of generating a random MAC as many other drivers do. Match behavior with other drivers to have a working ethernet interface. Signed-off-by: Rosen Penev Reviewed-by: Simon Horman --- drivers/net/ethernet/ibm/emac/core.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff --git a/drivers/net/ethernet/ibm/emac/core.c b/drivers/net/ethernet/ib= m/emac/core.c index 3bea10624291..fb9adcc3a16d 100644 --- a/drivers/net/ethernet/ibm/emac/core.c +++ b/drivers/net/ethernet/ibm/emac/core.c @@ -2937,9 +2937,12 @@ static int emac_init_config(struct emac_instance *de= v) =20 /* Read MAC-address */ err =3D of_get_ethdev_address(np, dev->ndev); - if (err) - return dev_err_probe(&dev->ofdev->dev, err, - "Can't get valid [local-]mac-address from OF !\n"); + if (err =3D=3D -EPROBE_DEFER) + return err; + if (err) { + dev_warn(&dev->ofdev->dev, "Can't get valid mac-address. Generating rand= om."); + eth_hw_addr_random(dev->ndev); + } =20 /* IAHT and GAHT filter parameterization */ if (emac_has_feature(dev, EMAC_FTR_EMAC4SYNC)) { --=20 2.47.0