From mboxrd@z Thu Jan 1 00:00:00 1970 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 E9ED3C88E5C for ; Wed, 16 Sep 2026 10:12:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-Type: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References:List-Owner; bh=Y8c6GtQD6LASomrAXdkGEmadEZfNr7D1BkhMYTZkBKs=; b=qEl+6OF9CBCCe+/jYHMqZX7c0y K6FS4kYImosvSFNJCyIqGORMC23dMQacDmhPNYm/saOxcetnKWr5TJpmjuTCxvZLYbCyHiaZBwHAY Z6vDmBR+3SnHyMrDuEq1jPCwDVqrxUaDPG4OJitYLQfu7/hLzedpfUZZ4ljeaE4Tph/axntmqvbNW 7uoQ5HngC0Y/C6JODOC7TPdA9/ygQV8fYgzgfzvYWdmXJR3wX/TvktXkRHm0tZbpR6rq+2KJQqZmr dVGFfgBH5io9mB9JCHBftMRfcJLqqKSYzhGZStxPqLlRm4i6O5iNRBe0dan5WlsHQCJHHHl7Bt3xS 6KHs0dAg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1x6mcw-00000008wYS-2Cb1; Wed, 16 Sep 2026 10:12:30 +0000 Received: from smtp81.cstnet.cn ([159.226.251.81] helo=cstnet.cn) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1x6mct-00000008wXg-17OO for linux-arm-kernel@lists.infradead.org; Wed, 16 Sep 2026 10:12:28 +0000 Received: from dfae2b116770.home.arpa (unknown [36.110.52.2]) by APP-03 (Coremail) with SMTP id rQCowACnrTt+a6pqrujgBw--.42778S2; Wed, 16 Sep 2026 18:12:15 +0800 (CST) From: Wentao Liang To: Frank.Li@nxp.com Cc: Laurent.pinchart@ideasonboard.com, airlied@gmail.com, andrzej.hajda@intel.com, dri-devel@lists.freedesktop.org, festevam@gmail.com, imx@lists.linux.dev, jernej.skrabec@gmail.com, jonas@kwiboo.se, kernel@pengutronix.de, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, luca.ceresoli@bootlin.com, maarten.lankhorst@linux.intel.com, mripard@kernel.org, neil.armstrong@linaro.org, rfoss@kernel.org, s.hauer@pengutronix.de, simona@ffwll.ch, tzimmermann@suse.de, victor.liu@nxp.com, Wentao Liang Subject: [PATCH] drm/bridge: imx8mp-hdmi-pvi: Fix next_bridge reference leak Date: Wed, 16 Sep 2026 10:11:46 +0000 Message-Id: <20260916101146.2015255-1-vulab@iscas.ac.cn> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CM-TRANSID: rQCowACnrTt+a6pqrujgBw--.42778S2 X-Coremail-Antispam: 1UD129KBjvdXoWrtF1kuFW8XF4DJFy7Ar47urg_yoWkCFg_uF n8ZrW8Xr43Cr1qgw12yr43ZasFy3WDWFW7uF12grZ3trWavr9avw47XrykWry7ZF4fGF9r Ar4qqFWkZr17CjkaLaAFLSUrUUUUjb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUIcSsGvfJTRUUUbaAFF20E14v26ryj6rWUM7CY07I20VC2zVCF04k26cxKx2IYs7xG 6rWj6s0DM7CIcVAFz4kK6r1j6r18M28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48ve4kI8w A2z4x0Y4vE2Ix0cI8IcVAFwI0_Xr0_Ar1l84ACjcxK6xIIjxv20xvEc7CjxVAFwI0_Gr1j 6F4UJwA2z4x0Y4vEx4A2jsIE14v26rxl6s0DM28EF7xvwVC2z280aVCY1x0267AKxVW0oV Cq3wAS0I0E0xvYzxvE52x082IY62kv0487Mc02F40EFcxC0VAKzVAqx4xG6I80ewAv7VC0 I7IYx2IY67AKxVWUtVWrXwAv7VC2z280aVAFwI0_Gr1j6F4UJwAm72CE4IkC6x0Yz7v_Jr 0_Gr1lF7xvr2IYc2Ij64vIr41lF7I21c0EjII2zVCS5cI20VAGYxC7M4IIrI8v6xkF7I0E 8cxan2IY04v7MxkF7I0En4kS14v26r4a6rW5MxAIw28IcxkI7VAKI48JMxC20s026xCaFV Cjc4AY6r1j6r4UMI8I3I0E5I8CrVAFwI0_Jr0_Jr4lx2IqxVCjr7xvwVAFwI0_JrI_JrWl x4CE17CEb7AF67AKxVW8ZVWrXwCIc40Y0x0EwIxGrwCI42IY6xIIjxv20xvE14v26r1I6r 4UMIIF0xvE2Ix0cI8IcVCY1x0267AKxVW8Jr0_Cr1UMIIF0xvE42xK8VAvwI8IcIk0rVWU JVWUCwCI42IY6I8E87Iv67AKxVWxJVW8Jr1lIxAIcVC2z280aVCY1x0267AKxVWxJr0_Gc JvcSsGvfC2KfnxnUUI43ZEXa7sRiNeOPUUUUU== X-Originating-IP: [36.110.52.2] X-CM-SenderInfo: pyxotu46lvutnvoduhdfq/1tbiBwEMA2qqQJWpwwAAs2 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260916_031227_690916_C51281F8 X-CRM114-Status: UNSURE ( 8.93 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org imx8mp_hdmi_pvi_probe() takes a reference to the next bridge in the pipeline with of_drm_find_and_get_bridge() and stores it in pvi->bridge.next_bridge, but the reference is never released, leaking the bridge on driver unbind. Drop the reference in imx8mp_hdmi_pvi_remove() once the bridge has been unregistered. Fixes: 7654c807f207 ("drm/bridge: imx8mp-hdmi-pvi: convert to of_drm_find_and_get_bridge()") Signed-off-by: Wentao Liang --- drivers/gpu/drm/bridge/imx/imx8mp-hdmi-pvi.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/gpu/drm/bridge/imx/imx8mp-hdmi-pvi.c b/drivers/gpu/drm/bridge/imx/imx8mp-hdmi-pvi.c index 15fbb1be07cd..80e33d810a69 100644 --- a/drivers/gpu/drm/bridge/imx/imx8mp-hdmi-pvi.c +++ b/drivers/gpu/drm/bridge/imx/imx8mp-hdmi-pvi.c @@ -179,6 +179,7 @@ static void imx8mp_hdmi_pvi_remove(struct platform_device *pdev) struct imx8mp_hdmi_pvi *pvi = platform_get_drvdata(pdev); drm_bridge_remove(&pvi->bridge); + drm_bridge_put(pvi->bridge.next_bridge); pm_runtime_disable(&pdev->dev); } -- 2.34.1