From nobody Wed Dec 17 10:46:07 2025 Received: from relay8-d.mail.gandi.net (relay8-d.mail.gandi.net [217.70.183.201]) (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 ABF2B241671 for ; Wed, 26 Mar 2025 17:48:06 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.70.183.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1743011288; cv=none; b=AEO4MQNEZjf0ZT102/ep0HADqwYHhTZ9PlCgFcI19GH7YANSipYRruj0904NJDzgJZkuQ4okyv7ggFVPvnlrf6Kmlj3+M7s08zndwqzBzHHIu91bJYsN/dGL+dDLkCn1jUu00faf0f5RzOL8bs/GyFMjyU3xdygu2lmGMVyeKIA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1743011288; c=relaxed/simple; bh=M1PS9EGn5yf+ziXSX4oI2mhubvdhMPq5M4ZYRZwjdjI=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=qwVBpU46mV6XaDbCJbDLRyLG1oBOrJRahkK8sCzMwdNsMECNEjN3iEwapWfRQPgORPJ2JZUVGOIc7OXbp9MFFDEqa61Uaw0++doAqD04HomWX16r0+ARsZExGTqR+GIQ8aV0Luo6j1zYHbHukjIcw7P/ldtt1zQDg6VKMO4BfSk= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com; spf=pass smtp.mailfrom=bootlin.com; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b=PKe0GirU; arc=none smtp.client-ip=217.70.183.201 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=bootlin.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b="PKe0GirU" Received: by mail.gandi.net (Postfix) with ESMTPSA id 474944441C; Wed, 26 Mar 2025 17:48:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1743011285; 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=FzCa2zrAbheOTbL7Z1DIQWacnklnFI0a1ryUn/mz7c0=; b=PKe0GirU+LLt8flRiKK/pYhdiys9qYPxfgXHfHKxRrtN/m8vLr9kywoXjUzWb116szMYow Mjm+IfBSzbxJMxpjJjrhzXfyPTROGis3M5LJXwmDduF3qTi2beEZ0nwEHdJuhbUqGyMkNW vUZ7Bc+M1qgVDpJMT04F2LNO4xvB8I724Ymx7ytdPiiNwTQ/MdfXOohbDFrh+NywrZNYkf kVCpkPXTNj9tW8x+IxOmVdLBBYTsRqTs4Xjwc9SGRPsmLWVPmYjj1EbzbJECcg87A1l8ID UwMf9335RKmUXKt/Hkf6HhJiR0gAj2zqYyoxreeskxSGWreuPyxSDfp5c/sspg== From: Luca Ceresoli Date: Wed, 26 Mar 2025 18:47:38 +0100 Subject: [PATCH v9 4/5] drm/bridge: ti-sn65dsi83: use dynamic lifetime management Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20250326-drm-bridge-refcount-v9-4-5e0661fe1f84@bootlin.com> References: <20250326-drm-bridge-refcount-v9-0-5e0661fe1f84@bootlin.com> In-Reply-To: <20250326-drm-bridge-refcount-v9-0-5e0661fe1f84@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: gggruggvucftvghtrhhoucdtuddrgeefvddrtddtgdduieeiudejucetufdoteggodetrfdotffvucfrrhhofhhilhgvmecuifetpfffkfdpucggtfgfnhhsuhgsshgtrhhisggvnecuuegrihhlohhuthemuceftddunecusecvtfgvtghiphhivghnthhsucdlqddutddtmdenucfjughrpefhfffugggtgffkfhgjvfevofesthejredtredtjeenucfhrhhomhepnfhutggrucevvghrvghsohhlihcuoehluhgtrgdrtggvrhgvshholhhisegsohhothhlihhnrdgtohhmqeenucggtffrrghtthgvrhhnpeeiieeuvdfftefgueduleehueetgffgjeeitedtteetkeeuueeuueekveevvdeuveenucfkphepvdgrtddvmeeijedtmedvtddvtdemvggrtddumegsvgegudemleehvgejmeefgeefmeeludefvgenucevlhhushhtvghrufhiiigvpedunecurfgrrhgrmhepihhnvghtpedvrgdtvdemieejtdemvddtvddtmegvrgdtudemsggvgedumeelhegvjeemfeegfeemledufegvpdhhvghloheplgduledvrdduieekrddujeekrdejhegnpdhmrghilhhfrhhomheplhhutggrrdgtvghrvghsohhlihessghoohhtlhhinhdrtghomhdpnhgspghrtghpthhtohepfedupdhrtghpthhtohepmhgrrghrthgvnhdrlhgrnhhkhhhorhhstheslhhinhhugidrihhnthgvlhdrtghomhdprhgtphhtthhopehmrghrvgigseguvghngidruggvpdhrtghpthhtohepihhmgieslhhishhtshdrlhhinhhugidruggvvhdprhgtphhtt hhopefjuhhirdfruhesghgvhhgvrghlthhhtggrrhgvrdgtohhmpdhrtghpthhtohepshhimhhonhgrsehffhiflhhlrdgthhdprhgtphhtthhopehnvghilhdrrghrmhhsthhrohhngheslhhinhgrrhhordhorhhgpdhrtghpthhtoheprghirhhlihgvugesghhmrghilhdrtghomhdprhgtphhtthhopehhvghrvhgvrdgtohguihhnrgessghoohhtlhhinhdrtghomh X-GND-Sasl: luca.ceresoli@bootlin.com 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. Reviewed-by: Maxime Ripard Signed-off-by: Luca Ceresoli --- Changes in v9: none Changes in v8: none 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 6e0ba427c2582c33f7b95634a18dcda9ac28267f..4efb62376e196d8bb5e9f58867e= 5c0e1624391db 100644 --- a/drivers/gpu/drm/bridge/ti-sn65dsi83.c +++ b/drivers/gpu/drm/bridge/ti-sn65dsi83.c @@ -947,9 +947,9 @@ static int sn65dsi83_probe(struct i2c_client *client) struct sn65dsi83 *ctx; int ret; =20 - ctx =3D devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL); - if (!ctx) - return -ENOMEM; + ctx =3D devm_drm_bridge_alloc(dev, struct sn65dsi83, bridge, &sn65dsi83_f= uncs); + if (IS_ERR(ctx)) + return PTR_ERR(ctx); =20 ctx->dev =3D dev; INIT_WORK(&ctx->reset_work, sn65dsi83_reset_work); @@ -989,7 +989,6 @@ static int sn65dsi83_probe(struct i2c_client *client) dev_set_drvdata(dev, ctx); i2c_set_clientdata(client, ctx); =20 - ctx->bridge.funcs =3D &sn65dsi83_funcs; ctx->bridge.of_node =3D dev->of_node; ctx->bridge.pre_enable_prev_first =3D true; ctx->bridge.type =3D DRM_MODE_CONNECTOR_LVDS; --=20 2.49.0