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 E4696C433F5 for ; Mon, 17 Jan 2022 17:06:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S242622AbiAQRG4 (ORCPT ); Mon, 17 Jan 2022 12:06:56 -0500 Received: from ams.source.kernel.org ([145.40.68.75]:51108 "EHLO ams.source.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S241968AbiAQRDW (ORCPT ); Mon, 17 Jan 2022 12:03:22 -0500 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 ams.source.kernel.org (Postfix) with ESMTPS id DAD30B81155; Mon, 17 Jan 2022 17:03:20 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 34D07C36B06; Mon, 17 Jan 2022 17:03:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1642438999; bh=6V+sC1g13i8VXCbalZh08XyriymrAMskwoCmd6usGJM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Kk2cTqE2LoS35sZ7oifs4JYXHXJy9Quyekjfz+jGOW6xuRQp1JwlERMPeLTyxicUu 3TV6l5qZffg99kOzevOERgseOYOnSVcJngt02ZQ238s0oZ0A4sKRJJuGxOkyV/buYW iRgdJ6v5cF/3DjXaPcabbeOul7WICKC90joM7hGcv5Y8EL+QCKUSndqenusr1nkf2H 317bmD/Xx4lJU/KGjhpqvbb7jubPEdwraV/ydQqGvH341PuxLUjTWGfGcdNGizyIWQ DWlkzGgNfAOe6IHOHPQVnPVlXITfe9XjIrJASeiFDKPzwGiYF6Afdj2aRKuk+7iFVY SzE+yhm9kPdig== 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, chunfeng.yun@mediatek.com, kishon@ti.com, matthias.bgg@gmail.com, dri-devel@lists.freedesktop.org, linux-mediatek@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-phy@lists.infradead.org Subject: [PATCH AUTOSEL 5.15 42/44] phy: mediatek: Fix missing check in mtk_mipi_tx_probe Date: Mon, 17 Jan 2022 12:01:25 -0500 Message-Id: <20220117170127.1471115-42-sashal@kernel.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220117170127.1471115-1-sashal@kernel.org> References: <20220117170127.1471115-1-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/phy/mediatek/phy-mtk-mipi-dsi.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/phy/mediatek/phy-mtk-mipi-dsi.c b/drivers/phy/mediatek/phy-mtk-mipi-dsi.c index 28ad9403c4414..67b005d5b9e35 100644 --- a/drivers/phy/mediatek/phy-mtk-mipi-dsi.c +++ b/drivers/phy/mediatek/phy-mtk-mipi-dsi.c @@ -146,6 +146,8 @@ 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; mipi_tx->regs = devm_platform_ioremap_resource(pdev, 0); if (IS_ERR(mipi_tx->regs)) -- 2.34.1