From patchwork Sun Nov 21 16:56:38 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sam Protsenko X-Patchwork-Id: 518605 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 1C7ECC4321E for ; Sun, 21 Nov 2021 16:57:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238337AbhKURAH (ORCPT ); Sun, 21 Nov 2021 12:00:07 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42936 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238366AbhKURAB (ORCPT ); Sun, 21 Nov 2021 12:00:01 -0500 Received: from mail-lf1-x12e.google.com (mail-lf1-x12e.google.com [IPv6:2a00:1450:4864:20::12e]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B0270C061574 for ; Sun, 21 Nov 2021 08:56:55 -0800 (PST) Received: by mail-lf1-x12e.google.com with SMTP id bi37so69182065lfb.5 for ; Sun, 21 Nov 2021 08:56:55 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=avAIqxonoUpxUgZ8evBQJpwJeOjfCUq9oOQFKLq1vLw=; b=l8/nixacKiaxqNeKCxYAE0IUTq5hEDB8TTXvtvby/62PVSbNYfYY6252ILQpVGtR7i sbemH3A5gPoGfbrUD6LEW5wIvv6tC1kb1A0t7BeDEdUIMRdwCB1hjNGnjc+9H9rCRsNk DXXISrdJn5HHIZXbdLJHiG7Y9ItMeM9TZ/ES3JmOx0e9G2qGzUZuOSe92a6M6u1aOFXF R22l12gpRGIxgeJkSiXfNQEeK9ADL6+2q2qrx6U5YawFgqS88WzYpaQkcQoT9LLaob7N eOcCpXMC44QyGjOw6QQmYqcDhm4wHPqsDR75s6Mh7apWxp9VUt9JGFwMxszPSsQmLQuf wyZg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=avAIqxonoUpxUgZ8evBQJpwJeOjfCUq9oOQFKLq1vLw=; b=Bfp+MARPuMgvjtKcpf0uAfIj8k2xlFUEukHj3eSHGK55a/CzCqmghqjWJTIFaUZMe7 C8Kaf+XZrgHjGuVsHMdGA7Uc21ztg1RUjYP/ZGdWmlX8syPqs4o6B0iYo/6x73s4Czzf yGAL6R/J02Nj2xtF/1WVTdIScZILO3WULVo42zNm5++v5H/KQz2ULxd68DgGVd904bZt acLmnGAyEmfI8ki2nZSlIPZZ20JPp3C1JWIB1/0lIBWsZyrDZEMrNCfnciq2DUF3iEcA ps1RZ1Dt4WFDLSigP3ZTnrQy4RLlR/kyJ9fBXrZCgBUbdr6d9/2tmPNQNOKGA9mKfKjK gQuQ== X-Gm-Message-State: AOAM531OkZohqGTt4prJAseML1kwIo+vs0LgyLG8ivs8EEu+OdHYiVND 8tY9IW0c23IYokk+6zj07QckfQ== X-Google-Smtp-Source: ABdhPJwYEKjZatumNr73KLVhsFjF7ggTEf2VUTH3bcl9kKsPaJy+T2FEelvbOp4Uw4qCh4SilM5EBQ== X-Received: by 2002:a05:651c:2dd:: with SMTP id f29mr44338195ljo.464.1637513814116; Sun, 21 Nov 2021 08:56:54 -0800 (PST) Received: from localhost ([31.134.121.151]) by smtp.gmail.com with ESMTPSA id s15sm688642lfp.252.2021.11.21.08.56.53 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 21 Nov 2021 08:56:53 -0800 (PST) From: Sam Protsenko To: Guenter Roeck , Wim Van Sebroeck Cc: Rob Herring , Krzysztof Kozlowski , linux-watchdog@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org Subject: [PATCH v4 03/12] watchdog: s3c2410: Fail probe if can't find valid timeout Date: Sun, 21 Nov 2021 18:56:38 +0200 Message-Id: <20211121165647.26706-4-semen.protsenko@linaro.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20211121165647.26706-1-semen.protsenko@linaro.org> References: <20211121165647.26706-1-semen.protsenko@linaro.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-samsung-soc@vger.kernel.org Driver can't work properly if there no valid timeout was found in s3c2410wdt_set_heartbeat(). Ideally, that function should be reworked in a way that it's always able to find some valid timeout. As a temporary solution let's for now just fail the driver probe in case the valid timeout can't be found in s3c2410wdt_set_heartbeat() function. Signed-off-by: Sam Protsenko Reported-by: Guenter Roeck Suggested-by: Guenter Roeck Reviewed-by: Krzysztof Kozlowski Reviewed-by: Guenter Roeck --- Changes in v4: - Added R-b tag by Guenter Roeck Changes in v3: - Added R-b tag by Krzysztof Kozlowski Changes in v2: - (none): it's a new patch drivers/watchdog/s3c2410_wdt.c | 21 ++++++++++----------- 1 file changed, 10 insertions(+), 11 deletions(-) diff --git a/drivers/watchdog/s3c2410_wdt.c b/drivers/watchdog/s3c2410_wdt.c index 2395f353e52d..00421cf22556 100644 --- a/drivers/watchdog/s3c2410_wdt.c +++ b/drivers/watchdog/s3c2410_wdt.c @@ -515,7 +515,6 @@ static int s3c2410wdt_probe(struct platform_device *pdev) struct s3c2410_wdt *wdt; struct resource *wdt_irq; unsigned int wtcon; - int started = 0; int ret; wdt = devm_kzalloc(dev, sizeof(*wdt), GFP_KERNEL); @@ -581,15 +580,15 @@ static int s3c2410wdt_probe(struct platform_device *pdev) ret = s3c2410wdt_set_heartbeat(&wdt->wdt_device, wdt->wdt_device.timeout); if (ret) { - started = s3c2410wdt_set_heartbeat(&wdt->wdt_device, - S3C2410_WATCHDOG_DEFAULT_TIME); - - if (started == 0) - dev_info(dev, - "tmr_margin value out of range, default %d used\n", + ret = s3c2410wdt_set_heartbeat(&wdt->wdt_device, + S3C2410_WATCHDOG_DEFAULT_TIME); + if (ret == 0) { + dev_warn(dev, "tmr_margin value out of range, default %d used\n", S3C2410_WATCHDOG_DEFAULT_TIME); - else - dev_info(dev, "default timer value is out of range, cannot start\n"); + } else { + dev_err(dev, "failed to use default timeout\n"); + goto err_cpufreq; + } } ret = devm_request_irq(dev, wdt_irq->start, s3c2410wdt_irq, 0, @@ -613,10 +612,10 @@ static int s3c2410wdt_probe(struct platform_device *pdev) if (ret < 0) goto err_unregister; - if (tmr_atboot && started == 0) { + if (tmr_atboot) { dev_info(dev, "starting watchdog timer\n"); s3c2410wdt_start(&wdt->wdt_device); - } else if (!tmr_atboot) { + } else { /* if we're not enabling the watchdog, then ensure it is * disabled if it has been left running from the bootloader * or other source */