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 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id E1FA3C54756 for ; Thu, 22 May 2025 08:55:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: Content-Type:In-Reply-To:From:References:Cc:To:Subject:MIME-Version:Date: Message-ID:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=jZC8De01WGLQ0FZnZRzCr0Ua98ORVVZ/9nF4WDc7qXQ=; b=Hd2dqxDUBX5SEDz8jYLd8xuGAo zVL2qk8xNt9BwLqhHWZ6c44vZWKUxQpR0eXpTQheSYHzVxiERvH3Pd5IY+7fNYS3OLrjF9Zy6G+o1 2Pip45LJWtXBitHtfcG1ZSpwFBuBcWYfwdqyIgGGvDeqiLM2e0EOb2letoyMxltC2ITL3aFDXON/E dFXsm/iwPab9zUiPVS/ivzmWTnTpMreR8ffRALalULxj6xdWIvzg2CTtlHO9f03PpSjSgnHpukrzq u2V/z7FZN43ab9WnOmVRImx7+qQ3t6eMDS+3PJsh32JUubOhbIuJd6X8LsA4clVsRvB2t3y7e5YcX uneH1jPw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1uI1hx-00000000NYE-0RfX; Thu, 22 May 2025 08:55:21 +0000 Received: from dfw.source.kernel.org ([2604:1380:4641:c500::1]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1uI1YB-00000000KuR-0v29; Thu, 22 May 2025 08:45:16 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by dfw.source.kernel.org (Postfix) with ESMTP id 85FF75C5792; Thu, 22 May 2025 08:42:57 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id C3374C4CEE4; Thu, 22 May 2025 08:45:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1747903514; bh=dAKIS/SyGO4EUUI+9Ar6dI0ohAdSrKLFtebg+y8Y55o=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=IPehpjNqislBnS8rCMtBcA2ukVRx3gtn9llVd4hUzKwww4LWcg0Q+ubqahO1cC27M M2KJNHpcv+3bjRrQAhRgSbYzRR7ixFSMc9imuDpg2PAyVMywHRA9/ErWzGklj57uqU XuzLBNVuin36TjgIgx7vajurHIC8wn6x1kdD2+pqmMuwSrt9epjwNtUBkqaa9mRKqk EPLGBabBTt4hT+NmsmCs2tRmrmiFyTcHfhR0horPsKRef8EAzN1yatQUjdhB00oRyC kc9JldCLEoWjddZSxLE+a1HG+OP37GN5sJ8rEIjVMMzlJKR3Wtpz6d8CBvU5A7LHb/ zGS5qSHSfqK/A== Message-ID: Date: Thu, 22 May 2025 10:45:08 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] drm/rockchip: Use dev_err_probe() to simplify code To: =?UTF-8?Q?Heiko_St=C3=BCbner?= , long.yunjian@zte.com.cn, hjc@rock-chips.com Cc: andy.yan@rock-chips.com, maarten.lankhorst@linux.intel.com, mripard@kernel.org, tzimmermann@suse.de, airlied@gmail.com, simona@ffwll.ch, dri-devel@lists.freedesktop.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, linux-kernel@vger.kernel.org, fang.yumeng@zte.com.cn, mou.yi@zte.com.cn, xu.lifeng1@zte.com.cn, ouyang.maochun@zte.com.cn References: <20250515203554564-j1jBXUXR6bdiN6zARicC@zte.com.cn> <94e0951b-46e1-439b-9dbc-c2009a78b04b@kernel.org> <2022996.jZfb76A358@diego> From: Krzysztof Kozlowski Content-Language: en-US Autocrypt: addr=krzk@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250522_014515_345422_64E16306 X-CRM114-Status: GOOD ( 10.75 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 16/05/2025 11:58, Heiko Stübner wrote: > Am Donnerstag, 15. Mai 2025, 17:54:20 Mitteleuropäische Sommerzeit schrieb Krzysztof Kozlowski: >> On 15/05/2025 14:35, long.yunjian@zte.com.cn wrote: >>> From: Yumeng Fang >>> >>> In the probe path, dev_err() can be replaced with dev_err_probe() >> >> That's not probe path. I am not sure if you really understand this code. > > I think that is somewhat debateable. > > dw_hdmi_rockchip_bind() is part of the rockchip-drm component device, > so part of its probe-path. Also I think just the presence of EPROBE_DEFER > which causes the device to re-try probing later is a nice indicator that the No, that's not true. You can call every API like regulator_get from any context and you will get EPROBE_DEFER. This will not be a probe path. There are multiple cases of such drivers, I saw such patch even day ago. > code in question is _a_ probe path. (and usage of EPROBE_DEFER is an > established pattern to make that component device re-try probing later) > > And the parse_dt function itself is part of that path too. I quickly glanced and this was not obvious. The commit msg is poor here and does not explain that component_bind is ALWAYS probe path (unless it is clear for DRM folks). Best regards, Krzysztof