From nobody Thu Oct 9 06:06:40 2025 Received: from relay5-d.mail.gandi.net (relay5-d.mail.gandi.net [217.70.183.197]) (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 512B128313A for ; Fri, 20 Jun 2025 09:32:36 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.70.183.197 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750411959; cv=none; b=TVRyTTiO3IlW7Bhga5xHP7QsuufKe0uC991y09/Qj8uDj9v+Qm5JE2kDbaF/1OiDnjFue2dFZsnpD8sARWuIuj9Tgc9hGUcXeSMtoar1UVYOovTjUvPL/G4BJ8g4E+ztrobtnMFpjJ0vaOzmmsbV/WGrHGuUaR4uQRBi/RQb6cI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750411959; c=relaxed/simple; bh=iieGhevUOutzD2imOkHyTsbQZuGXWnuEOKLK9OSzie8=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=D83Bca3JJQ8pM9BhpEegoxYCs6fmyjbhrCggwYCzlr2LXgQMpH/pcwS0ZyoLcZP0kXpakEF3It5yr5xC8SiIauTsoh/TKXtUN9xLc2xdAmWYA8AVAqGD7M3DRcSfoIgcfx9RioD/QjOs0eeJL2cU95JozbhauhEPOtqKPZBQ89A= 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=kshl+dTn; arc=none smtp.client-ip=217.70.183.197 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="kshl+dTn" Received: by mail.gandi.net (Postfix) with ESMTPSA id 7905B41CFD; Fri, 20 Jun 2025 09:32:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1750411955; 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=Og/abJgrUqfxjsS4tOXPNFKEAFZRYJ9MNhUKQuNvNHY=; b=kshl+dTnu+cru5BATollAiVfbvs0owrC1lKuPCgQc4xd+grzHFwM92WovACoGTGfWKrbh0 d6iFxgGo50htxD+cLQnkSxKFopoOZBu50GfYCH5cErLDN8aW07DxWSXKMSTXpm8OzziGKh Z+Zo3m3yLAfYrddEtSFBxtFQ/A4EqVxGF++XCLKsM0pgSTH1k9SU69DUSjt6lGil/rrQrW vXdAjDJ06BgJH8Gtn5uxGvuwwLEz008HP2iXzSUE9K6UyI6GlmjfvavWViM/TazgtB7v7y RtMw5xMBgp/blBOxPvj2uod2HmLEcT0gbE31ipuMOD3/ulCNRFHi8Ffxyp8Myg== From: Luca Ceresoli Date: Fri, 20 Jun 2025 11:32:06 +0200 Subject: [PATCH 1/3] drm/bridge: get/put the bridge reference in drm_bridge_add/remove() 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: <20250620-drm-bridge-alloc-getput-drm-bridge-c-v1-1-bad7eba5d117@bootlin.com> References: <20250620-drm-bridge-alloc-getput-drm-bridge-c-v1-0-bad7eba5d117@bootlin.com> In-Reply-To: <20250620-drm-bridge-alloc-getput-drm-bridge-c-v1-0-bad7eba5d117@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 Cc: Dmitry Baryshkov , Anusha Srivatsa , 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: gggruggvucftvghtrhhoucdtuddrgeeffedrtddvgdektdehucetufdoteggodetrfdotffvucfrrhhofhhilhgvmecuifetpfffkfdpucggtfgfnhhsuhgsshgtrhhisggvnecuuegrihhlohhuthemuceftddunecusecvtfgvtghiphhivghnthhsucdlqddutddtmdenucfjughrpefhfffugggtgffkfhgjvfevofesthejredtredtjeenucfhrhhomhepnfhutggrucevvghrvghsohhlihcuoehluhgtrgdrtggvrhgvshholhhisegsohhothhlihhnrdgtohhmqeenucggtffrrghtthgvrhhnpeeiieeuvdfftefgueduleehueetgffgjeeitedtteetkeeuueeuueekveevvdeuveenucfkphepvdgrtddvmeeijedtmedvtddvtdemvggrtddumegsvgegudemleehvgejmeefgeefmeeludefvgenucevlhhushhtvghrufhiiigvpedtnecurfgrrhgrmhepihhnvghtpedvrgdtvdemieejtdemvddtvddtmegvrgdtudemsggvgedumeelhegvjeemfeegfeemledufegvpdhhvghloheplgduledvrdduieekrddujeekrdejhegnpdhmrghilhhfrhhomheplhhutggrrdgtvghrvghsohhlihessghoohhtlhhinhdrtghomhdpnhgspghrtghpthhtohepudejpdhrtghpthhtoheprghirhhlihgvugesghhmrghilhdrtghomhdprhgtphhtthhopehrfhhoshhssehkvghrnhgvlhdrohhrghdprhgtphhtthhopehthhhomhgrshdrphgvthgriiiiohhnihessghoohhtlhhinhdrtghomhdprhgtphhtthhopehmrggrr hhtvghnrdhlrghnkhhhohhrshhtsehlihhnuhigrdhinhhtvghlrdgtohhmpdhrtghpthhtoheplhhinhhugidqkhgvrhhnvghlsehvghgvrhdrkhgvrhhnvghlrdhorhhgpdhrtghpthhtohepmhhrihhprghrugeskhgvrhhnvghlrdhorhhgpdhrtghpthhtohepshhimhhonhgrsehffhiflhhlrdgthhdprhgtphhtthhopegrshhrihhvrghtshesrhgvughhrghtrdgtohhm X-GND-Sasl: luca.ceresoli@bootlin.com drm_bridge_add() adds the bridge to the global bridge_list, so take a reference for that. Vice versa in drm_bridge_remove(). Reviewed-by: Maxime Ripard Signed-off-by: Luca Ceresoli --- Changes in v8: none Changes in v7: - in v6 this was part of "drm/bridge: add support for refcounted DRM bridges", now split to a separate patch --- drivers/gpu/drm/drm_bridge.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/gpu/drm/drm_bridge.c b/drivers/gpu/drm/drm_bridge.c index d6ce7b4c019f415400bab8aa3d032638cba6cdc5..fa2b2457b16e145e3ace70c5398= 4937096d310d0 100644 --- a/drivers/gpu/drm/drm_bridge.c +++ b/drivers/gpu/drm/drm_bridge.c @@ -295,6 +295,8 @@ EXPORT_SYMBOL(__devm_drm_bridge_alloc); */ void drm_bridge_add(struct drm_bridge *bridge) { + drm_bridge_get(bridge); + mutex_init(&bridge->hpd_mutex); =20 if (bridge->ops & DRM_BRIDGE_OP_HDMI) @@ -342,6 +344,8 @@ void drm_bridge_remove(struct drm_bridge *bridge) mutex_unlock(&bridge_lock); =20 mutex_destroy(&bridge->hpd_mutex); + + drm_bridge_put(bridge); } EXPORT_SYMBOL(drm_bridge_remove); =20 --=20 2.49.0