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 X-Spam-Level: X-Spam-Status: No, score=-0.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,T_DKIMWL_WL_HIGH, URIBL_BLOCKED autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by aws-us-west-2-korg-lkml-1.web.codeaurora.org (Postfix) with ESMTP id E0961C433EF for ; Thu, 14 Jun 2018 14:35:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 96A6A20693 for ; Thu, 14 Jun 2018 14:35:48 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="a/dlIFGZ" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 96A6A20693 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=linuxfoundation.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965561AbeFNOKG (ORCPT ); Thu, 14 Jun 2018 10:10:06 -0400 Received: from mail.kernel.org ([198.145.29.99]:51074 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S964896AbeFNOKD (ORCPT ); Thu, 14 Jun 2018 10:10:03 -0400 Received: from localhost (LFbn-1-12247-202.w90-92.abo.wanadoo.fr [90.92.61.202]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 16F7D208DD; Thu, 14 Jun 2018 14:10:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1528985402; bh=yiOfN7Rjlsbgcq3c2fha0/kAwyMQRGEdpk5kd7HMBVE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=a/dlIFGZb6ugi/40RxakedDYR8HiJ4ACTV6AUPUOonZo7SJuqjMNbnhy7HROfxOIl 45Lo+CBeepQRQwyyFAVQKIfyllMEKBGxjA1zZldG4Y2PzvyWppn2LlGnmnUgPHkzw6 r6HKiTRzTu8CxrQTtg0Uk/UiN+ZbyPGwoY5zBjZM= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Vivek Gautam , Evan Green , Manu Gautam , Kishon Vijay Abraham I Subject: [PATCH 4.14 15/36] phy: qcom-qusb2: Fix crash if nvmem cell not specified Date: Thu, 14 Jun 2018 16:04:38 +0200 Message-Id: <20180614132157.947906976@linuxfoundation.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20180614132157.333004166@linuxfoundation.org> References: <20180614132157.333004166@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 4.14-stable review patch. If anyone has any objections, please let me know. ------------------ From: Manu Gautam commit 0b4555e776ba0712c6fafb98b226b21fd05d2427 upstream. Driver currently crashes due to NULL pointer deference while updating PHY tune register if nvmem cell is NULL. Since, fused value for Tune1/2 register is optional, we'd rather bail out. Fixes: ca04d9d3e1b1 ("phy: qcom-qusb2: New driver for QUSB2 PHY on Qcom chips") Reviewed-by: Vivek Gautam Reviewed-by: Evan Green Cc: stable # 4.14+ Signed-off-by: Manu Gautam Signed-off-by: Kishon Vijay Abraham I Signed-off-by: Greg Kroah-Hartman --- drivers/phy/qualcomm/phy-qcom-qusb2.c | 4 ++++ 1 file changed, 4 insertions(+) --- a/drivers/phy/qualcomm/phy-qcom-qusb2.c +++ b/drivers/phy/qualcomm/phy-qcom-qusb2.c @@ -178,6 +178,10 @@ static void qusb2_phy_set_tune2_param(st struct device *dev = &qphy->phy->dev; u8 *val; + /* efuse register is optional */ + if (!qphy->cell) + return; + /* * Read efuse register having TUNE2 parameter's high nibble. * If efuse register shows value as 0x0, or if we fail to find