From nobody Sun Feb 8 21:12:33 2026 Received: from cstnet.cn (smtp81.cstnet.cn [159.226.251.81]) (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 4FFBD86353 for ; Fri, 6 Feb 2026 08:48:20 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=159.226.251.81 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770367703; cv=none; b=BQS9D5eMdq7NHs2jOXYem1cUWV55JQ0EuXoJ1DOA4CTWFIk2KN8wgQUYD8zVT+/sb9ONdRn7igi9jBbi7l3CHagSy0TzPC7T22wQWzYdb47iDBIPMNxyMjSM01GxkRUOZ+Q9iRhWZK4vuvbnvLpUIzrJ0vMSfB6xD+laqZoC27I= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770367703; c=relaxed/simple; bh=yRi6imy6jvgkgVIOpLB+kUmOfVP5Z32dFY8+h/LGyc0=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=s50fNivIb3xRRyHvlapAcJ92CAX9jIyrCBH1qOr1pReKbMtsxIZa4PPefLXuSXa3YgrVPguhfQ0asfxsfqCThhHoXFd4X5sKvydm069NxSralE8JuawxQ6TB+UnT7APATCyVZRTJx9vvTz9rsiBXWyr+njoRMtcfzVRylzvxH6w= 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=159.226.251.81 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 localhost (unknown [124.16.138.129]) by APP-03 (Coremail) with SMTP id rQCowADH4Ne_qoVp5pDLBw--.24764S2; Fri, 06 Feb 2026 16:47:59 +0800 (CST) From: Chen Ni To: hjc@rock-chips.com, heiko@sntech.de, andy.yan@rock-chips.com, maarten.lankhorst@linux.intel.com, mripard@kernel.org, tzimmermann@suse.de, airlied@gmail.com, simona@ffwll.ch, damon.ding@rock-chips.com Cc: dri-devel@lists.freedesktop.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, linux-kernel@vger.kernel.org, Chen Ni Subject: [PATCH] drm/rockchip: analogix_dp: Add missing error check for platform_get_resource() Date: Fri, 6 Feb 2026 16:42:20 +0800 Message-Id: <20260206084220.543267-1-nichen@iscas.ac.cn> X-Mailer: git-send-email 2.25.1 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: rQCowADH4Ne_qoVp5pDLBw--.24764S2 X-Coremail-Antispam: 1UD129KBjvdXoWrtF43GFWDAw15AFW7JF4UCFg_yoWfurc_K3 WxXr43WF18ZrnYkw47A3y3uFZav3ZI9r4kWa1IqFZIyF1DJF18XFyFvr4F9ayUtF42yFZx G3Wjvr4Y9F15CjkaLaAFLSUrUUUUbb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUIcSsGvfJTRUUUbTAFF20E14v26r4j6ryUM7CY07I20VC2zVCF04k26cxKx2IYs7xG 6rWj6s0DM7CIcVAFz4kK6r1j6r18M28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48ve4kI8w A2z4x0Y4vE2Ix0cI8IcVAFwI0_Ar0_tr1l84ACjcxK6xIIjxv20xvEc7CjxVAFwI0_Gr1j 6F4UJwA2z4x0Y4vEx4A2jsIE14v26rxl6s0DM28EF7xvwVC2z280aVCY1x0267AKxVW0oV Cq3wAS0I0E0xvYzxvE52x082IY62kv0487Mc02F40EFcxC0VAKzVAqx4xG6I80ewAv7VC0 I7IYx2IY67AKxVWUJVWUGwAv7VC2z280aVAFwI0_Jr0_Gr1lOx8S6xCaFVCjc4AY6r1j6r 4UM4x0Y48IcxkI7VAKI48JM4x0x7Aq67IIx4CEVc8vx2IErcIFxwACI402YVCY1x02628v n2kIc2xKxwCY1x0262kKe7AKxVWUtVW8ZwCY02Avz4vE14v_GFyl42xK82IYc2Ij64vIr4 1l4I8I3I0E4IkC6x0Yz7v_Jr0_Gr1lx2IqxVAqx4xG67AKxVWUJVWUGwC20s026x8GjcxK 67AKxVWUGVWUWwC2zVAF1VAY17CE14v26r1q6r43MIIYrxkI7VAKI48JMIIF0xvE2Ix0cI 8IcVAFwI0_Jr0_JF4lIxAIcVC0I7IYx2IY6xkF7I0E14v26r4j6F4UMIIF0xvE42xK8VAv wI8IcIk0rVWUJVWUCwCI42IY6I8E87Iv67AKxVWUJVW8JwCI42IY6I8E87Iv6xkF7I0E14 v26r4j6r4UJbIYCTnIWIevJa73UjIFyTuYvjfUe9NVDUUUU X-CM-SenderInfo: xqlfxv3q6l2u1dvotugofq/ Content-Type: text/plain; charset="utf-8" Add missing error check for platform_get_resource() return value to prevent NULL pointer dereference when memory resource is not available. Fixes: 718b3bb9c0ab ("drm/rockchip: analogix_dp: Expand device data to supp= ort multiple edp display") Signed-off-by: Chen Ni Reviewed-by: Dragan Simic --- drivers/gpu/drm/rockchip/analogix_dp-rockchip.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c b/drivers/gpu/= drm/rockchip/analogix_dp-rockchip.c index fdab71d51e2a..3f5be14010c1 100644 --- a/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c +++ b/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c @@ -461,6 +461,8 @@ static int rockchip_dp_probe(struct platform_device *pd= ev) return -ENOMEM; =20 res =3D platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) + return -EINVAL; =20 i =3D 0; while (dp_data[i].reg) { --=20 2.25.1