From nobody Tue Oct 7 15:22:06 2025 Received: from relay2-d.mail.gandi.net (relay2-d.mail.gandi.net [217.70.183.194]) (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 4A44E21CA02 for ; Wed, 9 Jul 2025 16:00:16 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.70.183.194 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1752076820; cv=none; b=KKE4WxCAXimlXfF4QxhmVCeLbNy4CEW7N3ldcgvSwDCqztSlcEdk6g6fAs4Bx6BOMlIVx/83cCV745orxnc+mUYioqDYjRe6RFYnaiX4qMlr4XO9esh7Dl6Q22OnwyN+wYtXZ5Dny7Rm0Wz9El7chwFSLg7Kcr93FctPwPCDYnk= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1752076820; c=relaxed/simple; bh=5Syu9WnVi7HevXeIrTLiMgwnXFTXHluV3IAstodHJwQ=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=jH3+4c2a9on45Rctk2RtO1d81a90t6Tj66EZSprfTE6rswNSusG6NolriyUXkAwomYj3PvxVqAP5zPmRAG4IFseV9OdSOnVu8MwLfgvoLYVzjYmNR9onp1Ao6hCTFTiHsfi3StCt/JMOrt1F4ytqeg7YQXzAVy3z4wqD5nrxO48= 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=e3AGcNFY; arc=none smtp.client-ip=217.70.183.194 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="e3AGcNFY" Received: by mail.gandi.net (Postfix) with ESMTPSA id DEDE2442A3; Wed, 9 Jul 2025 16:00:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1752076809; 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=LNxdQDQdPNWABi2+jVMdS0AZAzE6JnkU7tDF4GIU70w=; b=e3AGcNFYJy+fFtS4PhF2KK9sXfT4k17j8c/UOseIvZr9O28X+xLntQPevLL1sXw3h12LO4 ZlCTNXFJq8pmSmDnHLJtHaPiQ0CetTULKhKLZytaqzKQOH5x/4C3ZWOmCAQd9eeWpvd7fH i1vIRqoBIq5hdEGgNaUunJh3agyWgxGfBzjWqqRjnz7bItpSeJ8e0U5ZFW2E7xe9PShf4x Xxgtdx+lyUXGSG/0kcAOkKKYOUge+5s53VN/rG/CnnXeZl7TSnmrBADMxL561Lrs172KSR h6CCI32ucML8FLZM2i58VbNa2ga6HBUblAKj+UfyQ1e2kQerxLrEDgnPktPghQ== From: Luca Ceresoli Date: Wed, 09 Jul 2025 17:59:38 +0200 Subject: [PATCH 2/3] drm/bridge: select_bus_fmt_recursive(): put the bridge obtained by drm_bridge_get_prev_bridge() 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: <20250709-drm-bridge-alloc-getput-drm_bridge_get_prev_bridge-v1-2-34ba6f395aaa@bootlin.com> References: <20250709-drm-bridge-alloc-getput-drm_bridge_get_prev_bridge-v1-0-34ba6f395aaa@bootlin.com> In-Reply-To: <20250709-drm-bridge-alloc-getput-drm_bridge_get_prev_bridge-v1-0-34ba6f395aaa@bootlin.com> To: Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , Andrzej Hajda , Neil Armstrong , Robert Foss , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , David Airlie , Simona Vetter Cc: Hui Pu , Thomas Petazzoni , dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, Luca Ceresoli X-Mailer: b4 0.14.2 X-GND-State: clean X-GND-Score: -100 X-GND-Cause: gggruggvucftvghtrhhoucdtuddrgeeffedrtdefgdefjeelkecutefuodetggdotefrodftvfcurfhrohhfihhlvgemucfitefpfffkpdcuggftfghnshhusghstghrihgsvgenuceurghilhhouhhtmecufedtudenucesvcftvggtihhpihgvnhhtshculddquddttddmnecujfgurhephfffufggtgfgkfhfjgfvvefosehtjeertdertdejnecuhfhrohhmpefnuhgtrgcuvegvrhgvshholhhiuceolhhutggrrdgtvghrvghsohhlihessghoohhtlhhinhdrtghomheqnecuggftrfgrthhtvghrnhepieeiuedvffetgfeuudelheeutefggfejieettdetteekueeuueeukeevvedvueevnecukfhppeekjedruddvtddrvddukedrvddtjeenucevlhhushhtvghrufhiiigvpedtnecurfgrrhgrmhepihhnvghtpeekjedruddvtddrvddukedrvddtjedphhgvlhhopegludelvddrudeikedruddrudefngdpmhgrihhlfhhrohhmpehluhgtrgdrtggvrhgvshholhhisegsohhothhlihhnrdgtohhmpdhnsggprhgtphhtthhopeduiedprhgtphhtthhopehjohhnrghssehkfihisghoohdrshgvpdhrtghpthhtohepnfgruhhrvghnthdrphhinhgthhgrrhhtsehiuggvrghsohhnsghorghrugdrtghomhdprhgtphhtthhopegurhhiqdguvghvvghlsehlihhsthhsrdhfrhgvvgguvghskhhtohhprdhorhhgpdhrtghpthhtoheplhhutggrrdgtvghrvghsohhlihessghoohhtlhhinhdrtghomhdprhgtphhtthhop ehtiihimhhmvghrmhgrnhhnsehsuhhsvgdruggvpdhrtghpthhtoheplhhinhhugidqkhgvrhhnvghlsehvghgvrhdrkhgvrhhnvghlrdhorhhgpdhrtghpthhtohepmhhrihhprghrugeskhgvrhhnvghlrdhorhhgpdhrtghpthhtohepthhhohhmrghsrdhpvghtrgiiiihonhhisegsohhothhlihhnrdgtohhm X-GND-Sasl: luca.ceresoli@bootlin.com The bridge returned by drm_bridge_get_prev_bridge() is refcounted. Put it when done. select_bus_fmt_recursive() has several return points, and ensuring drm_bridge_put() is always called in the right place would be error-prone (especially with future changes to the select_bus_fmt_recursive() code) and make code uglier. Instead use a scope-based free, which is future-proof and a lot cleaner. Signed-off-by: Luca Ceresoli Reviewed-by: Maxime Ripard --- drivers/gpu/drm/drm_bridge.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/drm_bridge.c b/drivers/gpu/drm/drm_bridge.c index 0b450b334afd82e0460f18fdd248f79d0a2b153d..e33ccc5cabab72505b839d23bfa= 5ae644d2105c4 100644 --- a/drivers/gpu/drm/drm_bridge.c +++ b/drivers/gpu/drm/drm_bridge.c @@ -941,11 +941,11 @@ static int select_bus_fmt_recursive(struct drm_bridge= *first_bridge, { unsigned int i, num_in_bus_fmts =3D 0; struct drm_bridge_state *cur_state; - struct drm_bridge *prev_bridge; + struct drm_bridge *prev_bridge __free(drm_bridge_put) =3D + drm_bridge_get_prev_bridge(cur_bridge); u32 *in_bus_fmts; int ret; =20 - prev_bridge =3D drm_bridge_get_prev_bridge(cur_bridge); cur_state =3D drm_atomic_get_new_bridge_state(crtc_state->state, cur_bridge); =20 --=20 2.50.0