From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tejun Heo Subject: Re: [V1] ata: sata_mv:- Handle return value of devm_ioremap. Date: Fri, 6 Jan 2017 15:46:20 -0500 Message-ID: <20170106204620.GD29909@mtj.duckdns.org> References: <1481564607-9626-1-git-send-email-arvind.yadav.cs@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from mail-qk0-f196.google.com ([209.85.220.196]:34783 "EHLO mail-qk0-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752119AbdAFUrA (ORCPT ); Fri, 6 Jan 2017 15:47:00 -0500 Content-Disposition: inline In-Reply-To: <1481564607-9626-1-git-send-email-arvind.yadav.cs@gmail.com> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: Arvind Yadav Cc: linux-ide@vger.kernel.org, linux-kernel@vger.kernel.org On Mon, Dec 12, 2016 at 11:13:27PM +0530, Arvind Yadav wrote: > Here, If devm_ioremap will fail. It will return NULL. > Then hpriv->base = NULL - 0x20000; Kernel can run into > a NULL-pointer dereference. This error check will avoid > NULL pointer dereference. > > Signed-off-by: Arvind Yadav Applied to libata/for-4.10-fixes. Thanks. -- tejun