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[23.128.96.18]) by mx.google.com with ESMTP id g22si1139931pji.142.2022.01.17.18.44.11; Mon, 17 Jan 2022 18:44:24 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; dkim=pass header.i=@kernel.org header.s=k20201202 header.b=UWP9gm+r; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241815AbiAQRC0 (ORCPT + 99 others); Mon, 17 Jan 2022 12:02:26 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45176 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S241821AbiAQRBP (ORCPT ); Mon, 17 Jan 2022 12:01:15 -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 08A40C06175B; Mon, 17 Jan 2022 09:01:15 -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 9CE07611C2; Mon, 17 Jan 2022 17:01:14 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id A1885C36AE3; Mon, 17 Jan 2022 17:01:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1642438874; bh=6V+sC1g13i8VXCbalZh08XyriymrAMskwoCmd6usGJM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=UWP9gm+rJCqZGRDt0Z/coGVZMV4BD519pNyBvaqG5zpIZy4XI5fxLWge/B/h+AGIo Jxi64sv3YHiIXd4Ri7vZyaNX/roxibP/N0tNK8VJjppqJAMVuUcOyrh+SMe+UQpotY kuYs/iAk2xPOs0ibKarVvgTmBMoWjYXzw+bFDAnyh/sL+QDDuLc+gMC3ZpRDXL056y m13ym5lIOm5xtfpjtQFYbW3hS28CzeDLYN59aEMel7SU+hrEc2bRWIzRanZyASNrP/ rjCAm1jXJzd6pAUm/OvD6mn0dMP8LdWNWyU62iHd4o3W1+17Y/OkODCqovlOUYJBa0 6FLKZk837XNzQ== 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 5.16 49/52] phy: mediatek: Fix missing check in mtk_mipi_tx_probe Date: Mon, 17 Jan 2022 11:58:50 -0500 Message-Id: <20220117165853.1470420-49-sashal@kernel.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220117165853.1470420-1-sashal@kernel.org> References: <20220117165853.1470420-1-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