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bh=O8+8F/hrb+sI4eVHPhXhlX9e0Bs2g0jUsX1Jf66Mmu8=; b=GB2m0dkHV4iqQqrmNlVxvJfVWb3MMX8io4a7nSw1DqGSLJsmp4hT06yBtIsoA/BhF/9Vw6 3ZYIGMds644GaXSFTWsRc/LPPcw3Fd9MkcAZT9P+p0d7TxNoYMsH2wuzq1XzoSQN51U3A3 TBom0OIyBcMESdkiyYLL3gyV98ir+yyJxPUXRYIrEF1Kx7Ll9kLt6CmLo1qoXomUGJ9ezt 4Kiwsb9qzzbYT498PJwtsf663LwGNKyhK2ARPlwcBv2zSvi+HiDvv4YYN/m0Xa9x1mOyk7 nSNVUmgekNdUwQQmcGl5TKkFrfcof+UMjx0cTiHSoNbwyeuP2vzC3u7ROdxANQ== From: Luca Ceresoli Date: Fri, 20 Jun 2025 19:26:14 +0200 Subject: [PATCH v8 2/5] drm/bridge: get the bridge returned by drm_bridge_chain_get_first_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: <20250620-drm-bridge-alloc-getput-drm_bridge_chain_get_first_bridge-v8-2-0321845fcafb@bootlin.com> References: <20250620-drm-bridge-alloc-getput-drm_bridge_chain_get_first_bridge-v8-0-0321845fcafb@bootlin.com> In-Reply-To: <20250620-drm-bridge-alloc-getput-drm_bridge_chain_get_first_bridge-v8-0-0321845fcafb@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 , Marek Vasut , Stefan Agner , Shawn Guo , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam Cc: Hui Pu , Thomas Petazzoni , 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: gggruggvucftvghtrhhoucdtuddrgeeffedrtddvgdekleelucetufdoteggodetrfdotffvucfrrhhofhhilhgvmecuifetpfffkfdpucggtfgfnhhsuhgsshgtrhhisggvnecuuegrihhlohhuthemuceftddunecusecvtfgvtghiphhivghnthhsucdlqddutddtmdenucfjughrpefhfffugggtgffkfhgjvfevofesthejredtredtjeenucfhrhhomhepnfhutggrucevvghrvghsohhlihcuoehluhgtrgdrtggvrhgvshholhhisegsohhothhlihhnrdgtohhmqeenucggtffrrghtthgvrhhnpeeiieeuvdfftefgueduleehueetgffgjeeitedtteetkeeuueeuueekveevvdeuveenucfkphepvdgrtddvmeeijedtmedvtddvtdemvggrtddumegsvgegudemleehvgejmeefgeefmeeludefvgenucevlhhushhtvghrufhiiigvpedtnecurfgrrhgrmhepihhnvghtpedvrgdtvdemieejtdemvddtvddtmegvrgdtudemsggvgedumeelhegvjeemfeegfeemledufegvpdhhvghloheplgduledvrdduieekrddujeekrdejhegnpdhmrghilhhfrhhomheplhhutggrrdgtvghrvghsohhlihessghoohhtlhhinhdrtghomhdpnhgspghrtghpthhtohepvdegpdhrtghpthhtoheplhhinhhugidqkhgvrhhnvghlsehvghgvrhdrkhgvrhhnvghlrdhorhhgpdhrtghpthhtohepkhgvrhhnvghlsehpvghnghhuthhrohhnihigrdguvgdprhgtphhtthhopehthhhomhgrshdrphgvthgriiiiohhnihessghoohhtlhhin hdrtghomhdprhgtphhtthhopefnrghurhgvnhhtrdhpihhntghhrghrthesihguvggrshhonhgsohgrrhgurdgtohhmpdhrtghpthhtoheplhhinhhugidqrghrmhdqkhgvrhhnvghlsehlihhsthhsrdhinhhfrhgruggvrggurdhorhhgpdhrtghpthhtohepshhtvghfrghnsegrghhnvghrrdgthhdprhgtphhtthhopehrfhhoshhssehkvghrnhgvlhdrohhrghdprhgtphhtthhopefjuhhirdfruhesghgvhhgvrghlthhhtggrrhgvrdgtohhm X-GND-Sasl: luca.ceresoli@bootlin.com drm_bridge_chain_get_first_bridge() returns a bridge pointer that the caller could hold for a long time. Increment the refcount of the returned bridge and document it must be put by the caller. Reviewed-by: Maxime Ripard Signed-off-by: Luca Ceresoli --- This patch was added in v7. --- include/drm/drm_bridge.h | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/include/drm/drm_bridge.h b/include/drm/drm_bridge.h index b110c5bba8c0612a71f749ad51345e7a8ccdc910..f98044581d67c380c3bc3a1943b= d6ab09b764ec3 100644 --- a/include/drm/drm_bridge.h +++ b/include/drm/drm_bridge.h @@ -1336,6 +1336,9 @@ drm_bridge_get_prev_bridge(struct drm_bridge *bridge) * drm_bridge_chain_get_first_bridge() - Get the first bridge in the chain * @encoder: encoder object * + * The refcount of the returned bridge is incremented. Use drm_bridge_put() + * when done with it. + * * RETURNS: * the first bridge in the chain, or NULL if @encoder has no bridge attach= ed * to it. @@ -1343,8 +1346,8 @@ drm_bridge_get_prev_bridge(struct drm_bridge *bridge) static inline struct drm_bridge * drm_bridge_chain_get_first_bridge(struct drm_encoder *encoder) { - return list_first_entry_or_null(&encoder->bridge_chain, - struct drm_bridge, chain_node); + return drm_bridge_get(list_first_entry_or_null(&encoder->bridge_chain, + struct drm_bridge, chain_node)); } =20 /** --=20 2.49.0