From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 2788713C682 for ; Sat, 31 Aug 2024 05:21:57 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725081718; cv=none; b=Wo3OFJ/6+Eqn0NTc2nQmJKCp8nAT9mkIPCAfzifx+9BLWLdTqqW0g4KAFUdQ6xrvs5eJiOSnNCbmr3FHCiCnPZisTQplpBmUDH9brJjggxDMrJe7SDd91ECKaS1EyFVAFzNTnQMhld7uRyt2uRWe4HACDxLS6Jl+XkKdxrQMcrw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725081718; c=relaxed/simple; bh=t6pvwIAJmY+Lfq5UZ/PkWNLjWOzeiRgOYK52OWCETT0=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=NpmFDm+dB8AL3uQQtqtG+aPs2+4B1d3OLoOjGkTOVvgt594742O9l2ZLWmc29QgPZT9xj2xWuzG8yYBlP2qOXItzDLGzjrOG2zGlnWEkw4quZoEApCCzp7R7n86xwMSw1pq0I//f+4F7DDzqpovHCIBqP5oxJZxYjYGDZmWxu0Q= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=qqbdTo+8; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="qqbdTo+8" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 37638C4CEC0; Sat, 31 Aug 2024 05:21:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1725081717; bh=t6pvwIAJmY+Lfq5UZ/PkWNLjWOzeiRgOYK52OWCETT0=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=qqbdTo+8TeY6TbTVdQXd3kF8ug+Yx/M+sB+oLWzbQeNLz6OQ5e9POqdf350h3oFq2 YzS/ZY93122/xVtkkEJiGnkgZP0AKoISLrQA4Z6ZTzAXR38NP87grbNlX/qmwWsuex tWaFClcY5+2FG2VSe/8rXo2WyJrK1fzq9kWWk0kQXgh1+hbOeST1kfdLmuAog5kJnI Op1g7g0u34BtQRT1kSIntoGAtU5WXbAoBMz2GQfhXtsUSdLMrcW7EPo1T/9PF6xuZE jZ9zrQT3iXfTlPCuNom8RpLJSbjHi8MRMwHEPPXriGCEMOwJEBIFRYamK0ETRCbMkb xBPPQqw320S3Q== Message-ID: <8a02ecd3-4e3d-4332-85da-8a0bdf4b9ed2@kernel.org> Date: Sat, 31 Aug 2024 07:21:52 +0200 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH -next v2 2/4] soc: ti: knav_dma: Use dev_err_probe() to simplfy code To: Jinjie Ruan , Nishanth Menon Cc: ssantosh@kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, jic23@kernel.org References: <20240830063228.3519385-1-ruanjinjie@huawei.com> <20240830063228.3519385-3-ruanjinjie@huawei.com> <20240830103155.5vs2hdokw6yysq47@finance> <29edea69-92ce-2ac9-2aa8-bb9a4674ca01@huawei.com> From: Krzysztof Kozlowski Content-Language: en-US Autocrypt: addr=krzk@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit On 31/08/2024 03:59, Jinjie Ruan wrote: > > > On 2024/8/30 18:31, Nishanth Menon wrote: >> On 14:32-20240830, Jinjie Ruan wrote: >>> Use the dev_err_probe() helper to simplify error handling >>> during probe. >>> >>> Signed-off-by: Jinjie Ruan >>> --- >>> v2: >>> - Split into 2 patches. >>> --- >>> drivers/soc/ti/knav_dma.c | 12 ++++-------- >>> 1 file changed, 4 insertions(+), 8 deletions(-) >>> >>> diff --git a/drivers/soc/ti/knav_dma.c b/drivers/soc/ti/knav_dma.c >>> index 15e41d3a5e22..eeec422a46f0 100644 >>> --- a/drivers/soc/ti/knav_dma.c >>> +++ b/drivers/soc/ti/knav_dma.c >>> @@ -708,17 +708,13 @@ static int knav_dma_probe(struct platform_device *pdev) >>> struct device_node *node = pdev->dev.of_node; >>> int ret = 0; >>> >>> - if (!node) { >>> - dev_err(&pdev->dev, "could not find device info\n"); >>> - return -EINVAL; >>> - } >>> + if (!node) >>> + return dev_err_probe(&pdev->dev, -EINVAL, "could not find device info\n"); >>> >>> kdev = devm_kzalloc(dev, >>> sizeof(struct knav_dma_pool_device), GFP_KERNEL); >>> - if (!kdev) { >>> - dev_err(dev, "could not allocate driver mem\n"); >>> - return -ENOMEM; >>> - } >>> + if (!kdev) >>> + return dev_err_probe(dev, -ENOMEM, "could not allocate driver mem\n"); >> >> These make no sense to me :( -> just using dev_err_probe when there is >> no chance of -EPROBE_DEFER ? > > I noticed a change in dev_err_probe() this year, which is described in > this patch: > > For an out-of-memory error there should be no additional output. Adapt > dev_err_probe() to not emit the error message when err is -ENOMEM. > This simplifies handling errors that might among others be -ENOMEM. > > > And the comment of dev_err_probe() said below: > > * Using this helper in your probe function is totally fine even if @err Fine but not much useful and at the same time huge churn from @vivo.com. Best regards, Krzysztof