From nobody Sat Sep 21 03:04:38 2024 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id F1AC6C77B60 for ; Thu, 30 Mar 2023 15:20:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232873AbjC3PUw (ORCPT ); Thu, 30 Mar 2023 11:20:52 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37356 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232840AbjC3PUu (ORCPT ); Thu, 30 Mar 2023 11:20:50 -0400 Received: from fudo.makrotopia.org (fudo.makrotopia.org [IPv6:2a07:2ec0:3002::71]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6A189D314; Thu, 30 Mar 2023 08:19:42 -0700 (PDT) Received: from local by fudo.makrotopia.org with esmtpsa (TLS1.3:TLS_AES_256_GCM_SHA384:256) (Exim 4.96) (envelope-from ) id 1phu3m-0006ZZ-1h; Thu, 30 Mar 2023 17:19:30 +0200 Date: Thu, 30 Mar 2023 16:19:26 +0100 From: Daniel Golle To: netdev@vger.kernel.org, linux-mediatek@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux@armlinux.org.uk, linux-kernel@vger.kernel.org, Andrew Lunn , =?utf-8?B?QXLEsW7DpyDDnG5hbA==?= , Florian Fainelli , Vladimir Oltean , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Matthias Brugger , AngeloGioacchino Del Regno , Sean Wang , Landen Chao , DENG Qingfang , Philipp Zabel Cc: Sam Shih , Lorenzo Bianconi , John Crispin , Felix Fietkau Subject: [PATCH net-next 01/15] net: dsa: mt7530: make some noise if register read fails Message-ID: <9bc5f475099a4a8840842808ea1a1290abf2c0d3.1680180959.git.daniel@makrotopia.org> References: MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Simply returning the negative error value instead of the read value doesn't seem like a good idea. Return 0 instead and add WARN_ON_ONCE(1) so this kind of error will not go unnoticed. Suggested-by: Andrew Lunn Signed-off-by: Daniel Golle Reviewed-by: Andrew Lunn --- drivers/net/dsa/mt7530.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/net/dsa/mt7530.c b/drivers/net/dsa/mt7530.c index a0d99af897ace..18d4aa6bb9968 100644 --- a/drivers/net/dsa/mt7530.c +++ b/drivers/net/dsa/mt7530.c @@ -224,9 +224,10 @@ mt7530_mii_read(struct mt7530_priv *priv, u32 reg) /* MT7530 uses 31 as the pseudo port */ ret =3D bus->write(bus, 0x1f, 0x1f, page); if (ret < 0) { + WARN_ON_ONCE(1); dev_err(&bus->dev, "failed to read mt7530 register\n"); - return ret; + return 0; } =20 lo =3D bus->read(bus, 0x1f, r); --=20 2.39.2