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 D8F3B1B87E9; Fri, 31 Jan 2025 14:07:55 +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=1738332476; cv=none; b=ZiQipWDhCAOvCuC1sLXoOHoYZ3RBfv0sUfBTWHD0P3YnsCS5A/178EOO1k139uisx5SSwYubnS9t/oAApSsSy4Dx+4XG4p02KVpMrkM1Qu1B55gV8biKpKCps3hLhrVn/jo8B6frpCgTiSkmq0sMfL9/7EVHeU6XWqF5a3VkVuE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738332476; c=relaxed/simple; bh=91PRDFTScaL13tOsC+DeQ4JyN56p/kP/RLQ4/vRE+hM=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=NeRAb38XkR0Z4jKUWCIzXPb/73ldKaTAZYH2fb2TugET4cx5IoWf1rFswdHRFNlHX8j8b/hc1WPvbUKAnTVrJOtF9QLdukR+bRyQa3XCZTAzc6xl9kGwNcJP6654wwUKa4cxWqM6DnoWat+EVonMvt+AgL1+HL+Qfvm6d6+EIao= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=uLvqD7AD; 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="uLvqD7AD" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2E25DC4CED1; Fri, 31 Jan 2025 14:07:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1738332475; bh=91PRDFTScaL13tOsC+DeQ4JyN56p/kP/RLQ4/vRE+hM=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=uLvqD7ADPflx7G9ZdYBxWd9Gi0DHJPdYftD7xQoKDUWmZqgdLEMSIxeVi42F8ZthV t67IjHYeN4lXLMxSEvPdEpg1ECqz+WlcBU7t8IlItq0u+ulNsHx0zQXbcdLi1JTMrc DhLj8m1rawvSeU/OM4hRD5fevNduumDy4ZwFuOqzlnMMznMYyIELl/awrq0E8Nqhmg j/wPyOr/zY5mvTNbOmHK2rpTyx06DOjE54JeKYzlWUm5arHtrmru3RXueAgfXZRdde RhiPC9fvoDPAmxynjzxAJewmEV8HPe6lEwg2N8uIIdLF111BU7DAdnDsmqX2QLXuZD EswvWAFKq//0A== Message-ID: <77e5166f-37f6-4931-b071-1c926cfe707c@kernel.org> Date: Fri, 31 Jan 2025 15:07:49 +0100 Precedence: bulk X-Mailing-List: imx@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 3/4] nvmem: imx-ocotp: Support accessing controller for i.MX8M Nano To: Alexander Stein , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Shawn Guo , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam , Srinivas Kandagatla Cc: devicetree@vger.kernel.org, imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org References: <20250130130101.1040824-1-alexander.stein@ew.tq-group.com> <20250130130101.1040824-4-alexander.stein@ew.tq-group.com> <4989387.31r3eYUQgx@steina-w> From: Krzysztof Kozlowski Content-Language: en-US Autocrypt: addr=krzk@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit On 31/01/2025 14:50, Alexander Stein wrote: >>> + >>> + while (!of_parse_phandle_with_args(child, "access-controllers", >>> + "#access-controller-cells", >>> + idx++, &args)) { >>> + of_node_put(args.np); >>> + if (args.np != dev->of_node) >> >> You are using args.np after dropping the reference. > > Indeed, but is it really a problem? The args.np pointer is still the same. > So the comparison is unaffected. > > Both branches need to drop the reference, no? Ah, indeed, you do not use the reference except pointer comparison. It's fine, maybe a bit less usual, but as you mentioned other alternative also does not look good, so fine for me. > But the following looks awefull as well. >> if (args.np != dev->of_node) { >> of_node_put(args.np); >> continue; >> } >> of_node_put(args.np); > Best regards, Krzysztof