From nobody Fri Sep 25 04:09:00 2026 Received: from cstnet.cn (smtp25.cstnet.cn [159.226.251.25]) (using TLSv1.2 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id AE71D442B15; Wed, 16 Sep 2026 18:15:05 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=159.226.251.25 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789582518; cv=none; b=GLm1nHvk3I2tAkBsl0eR4/Xl4ncJcJVLVD7WrjZl/uWUhPTxstFiTcIC87D+iZHPlvNvrlSqjYN60mQSLcDn/oNMHmQINgIVepA+69NNUK6ne7ZecifujXH6hbf0SK+0Ygi4Atg6wxCKuuvKEvKea4p9bOj74p3pbxtL5tOPap8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789582518; c=relaxed/simple; bh=IpFVF2oPftQ+Dw/8j+cjohxrNBD43MUmFBcLSB0DgNs=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=KgYssxrkZd7evchv31rz1WzE++M7CRy9sc3gjHYw22kv4nodq7u16DlhuWrikeeD58hsJWZrTlgShnOSSfol0UW1RUaodgjZ0XAVtJnvObLkC73w91GNMAIE6FwIW2TTS8hRo7C/9wcmGC9KIulgAe/xtF1vvGwx4ufK3pTIiRI= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=iscas.ac.cn; spf=pass smtp.mailfrom=iscas.ac.cn; arc=none smtp.client-ip=159.226.251.25 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=iscas.ac.cn Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=iscas.ac.cn Received: from dfae2b116770.home.arpa (unknown [36.110.52.2]) by APP-05 (Coremail) with SMTP id zQCowAA3oDqe3KpqlU9vCA--.23663S2; Thu, 17 Sep 2026 02:14:54 +0800 (CST) From: Wentao Liang To: airlied@gmail.com Cc: andrzej.hajda@intel.com, andy.yan@rock-chips.com, dri-devel@lists.freedesktop.org, heiko@sntech.de, hjc@rock-chips.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-rockchip@lists.infradead.org, maarten.lankhorst@linux.intel.com, mripard@kernel.org, simona@ffwll.ch, tzimmermann@suse.de, Wentao Liang , stable@vger.kernel.org Subject: [PATCH] drm/rockchip: dsi: Fix second reference leak in dw_mipi_dsi_rockchip_host_detach() Date: Wed, 16 Sep 2026 18:14:26 +0000 Message-Id: <20260916181426.2091074-1-vulab@iscas.ac.cn> X-Mailer: git-send-email 2.34.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-CM-TRANSID: zQCowAA3oDqe3KpqlU9vCA--.23663S2 X-Coremail-Antispam: 1UD129KBjvdXoWrtFy8ZF4xCF1rKrWUZF45GFg_yoWkZrX_Kw 1Iqr15Wr4rJ3sxZ3W8C3y3uFZIk3sF9FWIga10vFZxZa9rJr1IqrZ5Aw4YqF17Cay3AFZ7 G3W0qryrCan3WjkaLaAFLSUrUUUUjb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUIcSsGvfJTRUUUb-xFF20E14v26r4j6ryUM7CY07I20VC2zVCF04k26cxKx2IYs7xG 6rWj6s0DM7CIcVAFz4kK6r1j6r18M28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48ve4kI8w A2z4x0Y4vE2Ix0cI8IcVAFwI0_Gr0_Xr1l84ACjcxK6xIIjxv20xvEc7CjxVAFwI0_Gr1j 6F4UJwA2z4x0Y4vEx4A2jsIE14v26r4UJVWxJr1l84ACjcxK6I8E87Iv6xkF7I0E14v26F 4UJVW0owAS0I0E0xvYzxvE52x082IY62kv0487Mc02F40EFcxC0VAKzVAqx4xG6I80ewAv 7VC0I7IYx2IY67AKxVWUAVWUtwAv7VC2z280aVAFwI0_Cr0_Gr1UMcvjeVCFs4IE7xkEbV WUJVW8JwACjcxG0xvY0x0EwIxGrwACjI8F5VA0II8E6IAqYI8I648v4I1lFIxGxcIEc7Cj xVA2Y2ka0xkIwI1lc7CjxVAaw2AFwI0_Jw0_GFyl42xK82IYc2Ij64vIr41l4I8I3I0E4I kC6x0Yz7v_Jr0_Gr1lx2IqxVAqx4xG67AKxVWUJVWUGwC20s026x8GjcxK67AKxVWUGVWU WwC2zVAF1VAY17CE14v26r1q6r43MIIYrxkI7VAKI48JMIIF0xvE2Ix0cI8IcVAFwI0_JF I_Gr1lIxAIcVC0I7IYx2IY6xkF7I0E14v26r4UJVWxJr1lIxAIcVCF04k26cxKx2IYs7xG 6r1j6r1xMIIF0xvEx4A2jsIE14v26F4j6r4UJwCI42IY6I8E87Iv6xkF7I0E14v26F4UJV W0obIYCTnIWIevJa73UjIFyTuYvjfUw5l8UUUUU X-CM-SenderInfo: pyxotu46lvutnvoduhdfq/1tbiBwEMA2qqpVh2owAAsh Content-Type: text/plain; charset="utf-8" The reference to the dual-DSI partner device obtained through dw_mipi_dsi_rockchip_find_second() is never released after removing the partner component. Drop it once component_del() is done. Fixes: cf6d100dd238 ("drm/rockchip: dsi: add dual mipi support") Cc: stable@vger.kernel.org Signed-off-by: Wentao Liang --- drivers/gpu/drm/rockchip/dw-mipi-dsi-rockchip.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/rockchip/dw-mipi-dsi-rockchip.c b/drivers/gpu/= drm/rockchip/dw-mipi-dsi-rockchip.c index 2c1f1c53ddda..7f2d3cd28694 100644 --- a/drivers/gpu/drm/rockchip/dw-mipi-dsi-rockchip.c +++ b/drivers/gpu/drm/rockchip/dw-mipi-dsi-rockchip.c @@ -1101,8 +1101,10 @@ static int dw_mipi_dsi_rockchip_host_detach(void *pr= iv_data, struct device *second; =20 second =3D dw_mipi_dsi_rockchip_find_second(dsi); - if (second && !IS_ERR(second)) + if (second && !IS_ERR(second)) { component_del(second, &dw_mipi_dsi_rockchip_ops); + put_device(second); + } =20 component_del(dsi->dev, &dw_mipi_dsi_rockchip_ops); =20 --=20 2.34.1