From patchwork Fri Mar 14 10:31:23 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Luca Ceresoli X-Patchwork-Id: 14016613 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 gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (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 85496C28B2F for ; Fri, 14 Mar 2025 10:32:03 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id AC92B10E9BC; Fri, 14 Mar 2025 10:32:02 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=bootlin.com header.i=@bootlin.com header.b="oYCLKhCp"; dkim-atps=neutral Received: from relay5-d.mail.gandi.net (relay5-d.mail.gandi.net [217.70.183.197]) by gabe.freedesktop.org (Postfix) with ESMTPS id C7B8610E9BC for ; Fri, 14 Mar 2025 10:32:00 +0000 (UTC) Received: by mail.gandi.net (Postfix) with ESMTPSA id 3F1EB432F7; Fri, 14 Mar 2025 10:31:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1741948319; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=/XKer6YRzFC14aGKwfShakn2j9MH1LzXqYnu+85QMDI=; b=oYCLKhCpkUSfVDFsTef4kEEhEtrt57hqo9DiqZimZ+kP38HnpNI+oB/DQdpmG9kslsatL3 sf6LLlZdS0sDMYcUedmogR+OtuiDgpznIGj6ZZZo+j0W7E5TnLRQU36nzajyKBEXtnVV3x 9Gnf+zwJuYUrAaPQsmchlkh4Uk/Jg4xFoWET6Hyj/Z/y/4YnACduByU1FIBmyq/5BWIZV8 eTLnf6x+k7EnXcDO/EEjfszFrhClEp9vbsrIyoFalx1pvYxux5mTykbzxQl4fKi12xiQxp eLts8ukaDXw6JmMvVnWE3Z6LjiSO9fl3FdIw1SLO3kWVP4bSHx3t6acKkTlDRQ== From: Luca Ceresoli Date: Fri, 14 Mar 2025 11:31:23 +0100 Subject: [PATCH v7 10/11] drm/bridge: ti-sn65dsi83: use dynamic lifetime management MIME-Version: 1.0 Message-Id: <20250314-drm-bridge-refcount-v7-10-152571f8c694@bootlin.com> References: <20250314-drm-bridge-refcount-v7-0-152571f8c694@bootlin.com> In-Reply-To: <20250314-drm-bridge-refcount-v7-0-152571f8c694@bootlin.com> To: Andrzej Hajda , Neil Armstrong , Robert Foss , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Marek Vasut , Stefan Agner , Shawn Guo , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam , Inki Dae , Jagan Teki , Marek Szyprowski Cc: Thomas Petazzoni , Anusha Srivatsa , Paul Kocialkowski , Dmitry Baryshkov , =?utf-8?q?Herv=C3=A9_Codina?= , Hui Pu , dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org, Luca Ceresoli X-Mailer: b4 0.14.2 X-GND-State: clean X-GND-Score: -100 X-GND-Cause: gggruggvucftvghtrhhoucdtuddrgeefvddrtddtgddufedtiedtucetufdoteggodetrfdotffvucfrrhhofhhilhgvmecuifetpfffkfdpucggtfgfnhhsuhgsshgtrhhisggvnecuuegrihhlohhuthemuceftddunecusecvtfgvtghiphhivghnthhsucdlqddutddtmdenucfjughrpefhfffugggtgffkfhgjvfevofesthejredtredtjeenucfhrhhomhepnfhutggrucevvghrvghsohhlihcuoehluhgtrgdrtggvrhgvshholhhisegsohhothhlihhnrdgtohhmqeenucggtffrrghtthgvrhhnpeeiieeuvdfftefgueduleehueetgffgjeeitedtteetkeeuueeuueekveevvdeuveenucfkphepvdgrtddvmeeijedtmedvtddvtdemvggrtddumegrtddtvdemudgsrgejmeegkehfjeemudeltgehnecuvehluhhsthgvrhfuihiivgepkeenucfrrghrrghmpehinhgvthepvdgrtddvmeeijedtmedvtddvtdemvggrtddumegrtddtvdemudgsrgejmeegkehfjeemudeltgehpdhhvghloheplgduledvrdduieekrddujeekrdduudekngdpmhgrihhlfhhrohhmpehluhgtrgdrtggvrhgvshholhhisegsohhothhlihhnrdgtohhmpdhnsggprhgtphhtthhopeefuddprhgtphhtthhopefjuhhirdfruhesghgvhhgvrghlthhhtggrrhgvrdgtohhmpdhrtghpthhtohepihhnkhhirdgurggvsehsrghmshhunhhgrdgtohhmpdhrtghpthhtohepmhgrrhgvgiesuggvnhigrdguvgdprhgtphhtthhopehjvghrn hgvjhdrshhkrhgrsggvtgesghhmrghilhdrtghomhdprhgtphhtthhopehprghulhhksehshihsqdgsrghsvgdrihhopdhrtghpthhtoheprghsrhhivhgrthhssehrvgguhhgrthdrtghomhdprhgtphhtthhopehmrhhiphgrrhgusehkvghrnhgvlhdrohhrghdprhgtphhtthhopehjohhnrghssehkfihisghoohdrshgv X-GND-Sasl: luca.ceresoli@bootlin.com X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Allow this bridge to be removable without dangling pointers and use-after-free, together with proper use of drm_bridge_get() and _put() by consumers. Signed-off-by: Luca Ceresoli --- Changes in v7: none Changed in v6: - Update to use devm_drm_bridge_alloc(), remove .destroy This patch was added in v5. --- drivers/gpu/drm/bridge/ti-sn65dsi83.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) diff --git a/drivers/gpu/drm/bridge/ti-sn65dsi83.c b/drivers/gpu/drm/bridge/ti-sn65dsi83.c index 5f8bfeeb553f970671a602fcf2594016243b9db2..bc092fb926563439e316c2cb5a817bd938093df4 100644 --- a/drivers/gpu/drm/bridge/ti-sn65dsi83.c +++ b/drivers/gpu/drm/bridge/ti-sn65dsi83.c @@ -952,9 +952,9 @@ static int sn65dsi83_probe(struct i2c_client *client) struct sn65dsi83 *ctx; int ret; - ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL); - if (!ctx) - return -ENOMEM; + ctx = devm_drm_bridge_alloc(dev, struct sn65dsi83, bridge, &sn65dsi83_funcs); + if (IS_ERR(ctx)) + return PTR_ERR(ctx); ctx->dev = dev; INIT_WORK(&ctx->reset_work, sn65dsi83_reset_work); @@ -994,7 +994,6 @@ static int sn65dsi83_probe(struct i2c_client *client) dev_set_drvdata(dev, ctx); i2c_set_clientdata(client, ctx); - ctx->bridge.funcs = &sn65dsi83_funcs; ctx->bridge.of_node = dev->of_node; ctx->bridge.pre_enable_prev_first = true; ctx->bridge.type = DRM_MODE_CONNECTOR_LVDS;