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 BDD3C361DD9; Wed, 17 Dec 2025 10:17:06 +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=1765966626; cv=none; b=k45bInr3DBomgvyQhLiw8dknG6yGVhbGVzrWQH7T+OhWBk8I3ZIRQZ5uw4xbJVCO+kXX7dSy0quL9qcFIqdRu2yXp/wpuj5vMJDMwaexZuEkPUZn1F4gQ4DfpFGGe+/aoV1gyIos3eH1kb2HE0t5juAKIjh8m1uqDyYQXLDLx2Y= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1765966626; c=relaxed/simple; bh=mZgmTPAeMOlNUGInXD4jCnDjAKu2QFFNlX+3u+2jIAc=; h=Message-ID:Date:From:To:Subject:In-Reply-To:References:Cc; b=p3JBOgH/qftXr74+/7K1asDgRhr+FDGkFaxF0WBktu3GxNWBIY4MV7y5kd176HoruOEtyMOkFv4ShVstVt6us2Q0IXST2EeJqtOGlcgkmQLb2R7fmfE10+wJqslfnXEIV+sl5HXwBN+hJigxTbXdSKRuIlcHXKBnQ7rIAEKTFj0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=VyZAKLyF; 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="VyZAKLyF" Received: by smtp.kernel.org (Postfix) with ESMTPSA id BAFD5C4CEF5; Wed, 17 Dec 2025 10:17:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1765966626; bh=mZgmTPAeMOlNUGInXD4jCnDjAKu2QFFNlX+3u+2jIAc=; h=Date:From:To:Subject:In-Reply-To:References:Cc:From; b=VyZAKLyFoi3kNFjG5dOkan+Qis7IQcXAKUc7okV15sa3Du0PSNJfnus2iX/r1acOQ 26zGZkm7o5M+xp1aBKtVPRBSYi7SgUPYKH5wZQeVv4qy5KEPuvQLyMVPOoeDxPuwPy WTU36fOOpVOxpXa73nbFDyWwksA0xJBLCzX3cC3neAzgWhEyvgGkGfgEiDkNzNnaXj skrcOyBoe+Sh5yLymrrlgsdXfj67lvuljIFJXiZ7y0q1YmFDrA4FV2EvLFSrPeev52 49ufHVFENgYAROMzIktwy4ImrH0phkgwUQRt/qrNh9mWTn2uBAq0Av6X7PcxRghwIQ fsL/NCIkBT4CA== Message-ID: <58a8aea8735f1ec8db23a95da8b7e0a8@kernel.org> Date: Wed, 17 Dec 2025 10:17:03 +0000 From: "Maxime Ripard" To: "Luca Ceresoli" Subject: Re: [PATCH v3 06/22] drm/bridge: add next_bridge pointer to struct drm_bridge In-Reply-To: <20251216-drm-bridge-alloc-getput-drm_of_find_bridge-v3-6-b5165fab8058@bootlin.com> References: <20251216-drm-bridge-alloc-getput-drm_of_find_bridge-v3-6-b5165fab8058@bootlin.com> Cc: dri-devel@lists.freedesktop.org, imx@lists.linux.dev, linux-amlogic@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, "Alexey Brodkin" , "Andrzej Hajda" , "David Airlie" , "Fabio Estevam" , "Hui Pu" , "Jernej Skrabec" , "Jerome Brunet" , "Jonas Karlman" , "Jonathan Corbet" , "Kevin Hilman" , "Laurent Pinchart" , "Liu Ying" , "Maarten Lankhorst" , "Martin Blumenstingl" , "Maxime Ripard" , "Neil Armstrong" , "Pengutronix Kernel Team" , "Phong LE" , "Robert Foss" , "Sascha Hauer" , "Shawn Guo" , "Simona Vetter" , "Thomas Petazzoni" , "Thomas Zimmermann" Content-Transfer-Encoding: quoted-printable Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: On Tue, 16 Dec 2025 18:58:39 +0100, Luca Ceresoli wrote: > Many bridge drivers store a next_bridge pointer in their private data and > use it for attach and sometimes other purposes. This is going to be risky > when bridge hot-unplug is used. >=20 > Considering this example scenario: >=20 > [ ... ] Reviewed-by: Maxime Ripard Thanks! Maxime