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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id F1B95C433F5 for ; Mon, 17 Jan 2022 17:13:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S243431AbiAQRNj (ORCPT ); Mon, 17 Jan 2022 12:13:39 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46356 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S243059AbiAQRIZ (ORCPT ); Mon, 17 Jan 2022 12:08:25 -0500 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C6AD8C061574; Mon, 17 Jan 2022 09:04:50 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id A706861278; Mon, 17 Jan 2022 17:04:50 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id B5206C36AEF; Mon, 17 Jan 2022 17:04:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1642439090; bh=zqxVLJAQDSMqLlm3O2uF0y8g2XadcjGY1EzyOllkM8s=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=aLlbxPOEs1E77MUZyICq9PH5P18U2qgG8emlrxLq51MwhTYGuuwMnsMHYjxxV4KHD MrC9qsgEy3ID+HNTt94e0ZByeWRqolFDZCuP/upFPN2kg0M9mSbuLas1HoUum2tbQu qwjc4DCRi676H3qtz4YQguuWSTHCExhtY5Llzss5U4IP8sZhxqn07l/a/HSJi6+oji /i5C3DNJFw9f5FwkGqQpxDGFy3A7tdQFZfD4CbHl98mqKSqpGdKNMrajFHi3+PgIfo LSx0TZqvICHydMn7ciBfSv6d0qO0b1QXaYnYPdYQuiFge3M6eZHS2rrlDxhXOsqRlu UHBhWEnHYqYuw== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Miaoqian Lin , AngeloGioacchino Del Regno , Vinod Koul , Sasha Levin , chunkuang.hu@kernel.org, p.zabel@pengutronix.de, airlied@linux.ie, daniel@ffwll.ch, matthias.bgg@gmail.com, dri-devel@lists.freedesktop.org, linux-mediatek@lists.infradead.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH AUTOSEL 5.10 33/34] phy: mediatek: Fix missing check in mtk_mipi_tx_probe Date: Mon, 17 Jan 2022 12:03:23 -0500 Message-Id: <20220117170326.1471712-33-sashal@kernel.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220117170326.1471712-1-sashal@kernel.org> References: <20220117170326.1471712-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Miaoqian Lin [ Upstream commit 399c91c3f30531593e5ff6ca7b53f47092128669 ] The of_device_get_match_data() function may return NULL. Add check to prevent potential null dereference. Signed-off-by: Miaoqian Lin Reviewed-by: AngeloGioacchino Del Regno Link: https://lore.kernel.org/r/20211224082103.7658-1-linmq006@gmail.com Signed-off-by: Vinod Koul Signed-off-by: Sasha Levin --- drivers/gpu/drm/mediatek/mtk_mipi_tx.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/gpu/drm/mediatek/mtk_mipi_tx.c b/drivers/gpu/drm/mediatek/mtk_mipi_tx.c index 8cee2591e7284..ccc742dc78bd9 100644 --- a/drivers/gpu/drm/mediatek/mtk_mipi_tx.c +++ b/drivers/gpu/drm/mediatek/mtk_mipi_tx.c @@ -147,6 +147,8 @@ static int mtk_mipi_tx_probe(struct platform_device *pdev) return -ENOMEM; mipi_tx->driver_data = of_device_get_match_data(dev); + if (!mipi_tx->driver_data) + return -ENODEV; mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); mipi_tx->regs = devm_ioremap_resource(dev, mem); -- 2.34.1