From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-17.3 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,NICE_REPLY_A, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 36CA4C6369E for ; Thu, 19 Nov 2020 13:39:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id BD92B22255 for ; Thu, 19 Nov 2020 13:39:07 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=ti.com header.i=@ti.com header.b="P/u19tPk" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727134AbgKSNii (ORCPT ); Thu, 19 Nov 2020 08:38:38 -0500 Received: from fllv0016.ext.ti.com ([198.47.19.142]:50916 "EHLO fllv0016.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726480AbgKSNih (ORCPT ); Thu, 19 Nov 2020 08:38:37 -0500 Received: from fllv0035.itg.ti.com ([10.64.41.0]) by fllv0016.ext.ti.com (8.15.2/8.15.2) with ESMTP id 0AJDcTYr042372; Thu, 19 Nov 2020 07:38:29 -0600 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1605793109; bh=nHG4ole5ud6+/+q2v9aEYqrYVx8fqlP+wXkdMjeFNZA=; h=Subject:To:CC:References:From:Date:In-Reply-To; b=P/u19tPkmGmf0S+O9VCaSKHmoovk35StxJoaLMTWGWiy1smaplz0CMJHZ6y/jVVYJ 4VlZFprH+ZzCxbSrzR4CQY3n3e6VImdEfZgMOMz+ftcakwlpR41gibWSbOW3jWvIXI 81+JM+YpqPb1tnyeHJ8/S4TzdEYUpTI0gkFIqGNc= Received: from DFLE104.ent.ti.com (dfle104.ent.ti.com [10.64.6.25]) by fllv0035.itg.ti.com (8.15.2/8.15.2) with ESMTPS id 0AJDcTjd034689 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Thu, 19 Nov 2020 07:38:29 -0600 Received: from DFLE105.ent.ti.com (10.64.6.26) by DFLE104.ent.ti.com (10.64.6.25) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1979.3; Thu, 19 Nov 2020 07:38:29 -0600 Received: from lelv0327.itg.ti.com (10.180.67.183) by DFLE105.ent.ti.com (10.64.6.26) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1979.3 via Frontend Transport; Thu, 19 Nov 2020 07:38:29 -0600 Received: from [10.250.100.73] (ileax41-snat.itg.ti.com [10.172.224.153]) by lelv0327.itg.ti.com (8.15.2/8.15.2) with ESMTP id 0AJDcRZx121192; Thu, 19 Nov 2020 07:38:27 -0600 Subject: Re: [PATCH] mdio_bus: suppress err message for reset gpio EPROBE_DEFER To: Heiner Kallweit , "David S. Miller" , , Jakub Kicinski , Andrew Lunn CC: References: <20201118142426.25369-1-grygorii.strashko@ti.com> <0329ed05-371b-0bb5-4f85-75ecaff6a70b@gmail.com> From: Grygorii Strashko Message-ID: <655ec6e4-6e75-1835-034c-ec18dac505e8@ti.com> Date: Thu, 19 Nov 2020 15:38:27 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: <0329ed05-371b-0bb5-4f85-75ecaff6a70b@gmail.com> Content-Type: text/plain; charset="utf-8"; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 19/11/2020 14:30, Heiner Kallweit wrote: > Am 18.11.2020 um 15:24 schrieb Grygorii Strashko: >> The mdio_bus may have dependencies from GPIO controller and so got >> deferred. Now it will print error message every time -EPROBE_DEFER is >> returned from: >> __mdiobus_register() >> |-devm_gpiod_get_optional() >> without actually identifying error code. >> >> "mdio_bus 4a101000.mdio: mii_bus 4a101000.mdio couldn't get reset GPIO" >> >> Hence, suppress error message when devm_gpiod_get_optional() returning >> -EPROBE_DEFER case. >> >> Signed-off-by: Grygorii Strashko >> --- >> drivers/net/phy/mdio_bus.c | 7 ++++--- >> 1 file changed, 4 insertions(+), 3 deletions(-) >> >> diff --git a/drivers/net/phy/mdio_bus.c b/drivers/net/phy/mdio_bus.c >> index 757e950fb745..54fc13043656 100644 >> --- a/drivers/net/phy/mdio_bus.c >> +++ b/drivers/net/phy/mdio_bus.c >> @@ -546,10 +546,11 @@ int __mdiobus_register(struct mii_bus *bus, struct module *owner) >> /* de-assert bus level PHY GPIO reset */ >> gpiod = devm_gpiod_get_optional(&bus->dev, "reset", GPIOD_OUT_LOW); >> if (IS_ERR(gpiod)) { >> - dev_err(&bus->dev, "mii_bus %s couldn't get reset GPIO\n", >> - bus->id); >> + err = PTR_ERR(gpiod); >> + if (err != -EPROBE_DEFER) >> + dev_err(&bus->dev, "mii_bus %s couldn't get reset GPIO %d\n", bus->id, err); >> device_del(&bus->dev); >> - return PTR_ERR(gpiod); >> + return err; >> } else if (gpiod) { >> bus->reset_gpiod = gpiod; >> >> > > Using dev_err_probe() here would simplify the code. > this was my first though, but was not sure if it's correct as dev_err_probe() will use dev to store defer reason, but the same 'dev' is deleted on the next line. I also thought about using bus->parent, but it's not always provided. So, if you think dev_err_probe(0) can be used - I can change and re-send. -- Best regards, grygorii