From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752800AbdKHQut (ORCPT ); Wed, 8 Nov 2017 11:50:49 -0500 Received: from mailout4.samsung.com ([203.254.224.34]:15584 "EHLO mailout4.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752256AbdKHQur (ORCPT ); Wed, 8 Nov 2017 11:50:47 -0500 DKIM-Filter: OpenDKIM Filter v2.11.0 mailout4.samsung.com 20171108165045epoutp044c768619ab44c4097ce0cc0f2459ee2d~1KmDRns5J0518505185epoutp04K X-AuditID: b6c32a45-333ff70000001129-ef-5a0335e4d1b6 From: Bartlomiej Zolnierkiewicz To: Fengguang Wu Cc: linux-ide@vger.kernel.org, Borislav Petkov , "David S. Miller" , Linus Torvalds , Jens Axboe , Bart Van Assche , linux-kernel@vger.kernel.org Subject: Re: [cdrom_check_status] BUG: unable to handle kernel NULL pointer dereference at 000001c0 Date: Wed, 08 Nov 2017 17:50:41 +0100 Message-id: <2347287.gTWU6fzh5s@amdc3058> User-Agent: KMail/4.13.3 (Linux/3.13.0-96-generic; KDE/4.13.3; x86_64; ; ) In-reply-to: <7885793.0mqNGdeUvE@amdc3058> MIME-version: 1.0 Content-transfer-encoding: 7Bit Content-type: text/plain; charset="us-ascii" X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFupgleLIzCtJLcpLzFFi42LZdljTVPeJKXOUwYZ5XBar7/azWRz82cZo 8XnDPzaLOedbWCzeP1/PbHFsxyMmi8u75rBZPOp7y+7A4fG9tY/FY8vKm0wei/e8ZPK4fLbU 48SM3ywe09acZ/L4vEkugD2KyyYlNSezLLVI3y6BK6Pp+EO2gnMsFRNX/mJpYLzO3MXIySEh YCLRs+E4UxcjF4eQwA5GiWNnj7NDON8ZJc7+fsMCU/XneAuYLSSwm1Hi+TwPCPsro8TL9ngQ m03ASmJi+ypGEFtEQFPi7aHNYPXMAm1MEsuWsoPYwgKpEm17T7KC2CwCqhL3J89kArF5gepP XW4Fs0UFvCS27GsHszkFtCQuLz7KAlEjKPFj8j2omfIS+/ZPZYWwdSTOHlvHCHK0hMBlNon3 nZOhXnOR+HDoMtQDwhKvjm9hh7ClJZ6t2sgIYU9nlNj+WwKieTOjxKrdE6CKrCUOH78ItYFP ouPwX6A4B1CcV6KjTQjC9JB4fNoNotpR4tbVjczwUNzxeAXbBEbZWUjunoXk7llI7l7AyLyK USy1oDg3PbXYqMBQrzgxt7g0L10vOT93EyM4fWi57mCccc7nEKMAB6MSD+8FOaYoIdbEsuLK 3EOMEhzMSiK8vfrMUUK8KYmVValF+fFFpTmpxYcYpTlYlMR567ddixASSE8sSc1OTS1ILYLJ MnFwSjUwJnGt8jfc80k4+axZeZiFv3jC/xDLjhNh4T83bi9rdD79VvTBrSi1Q3dSC1hd1x6X uRdczHeQ/1Xr7eZEidexGawLXbdV6Wg9//ecJXOWjs2+v0sr3q04sfRq2ZIfsq+Wb1S9WJ0Y baog6NP6omrNs8dnqy73P0hbkyxcpWt2TntLF+uDLMtlSizFGYmGWsxFxYkA+ZFK+xsDAAA= X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFnrALMWRmVeSWpSXmKPExsVy+t9jAd3HpsxRBitXq1usvtvPZnHwZxuj xecN/9gs5pxvYbF4/3w9s8WxHY+YLC7vmsNm8ajvLbsDh8f31j4Wjy0rbzJ5LN7zksnj8tlS jxMzfrN4TFtznsnj8ya5APYoLpuU1JzMstQifbsEroym4w/ZCs6xVExc+YulgfE6cxcjJ4eE gInEn+MtLF2MXBxCAjsZJbpOtrKDJIQEvjJKtDzQBLHZBKwkJravYgSxRQQ0Jd4e2swCYjML tDFJTHyoAWILC6RKtO09yQpiswioStyfPJMJxOYFqj91uRXMFhXwktiyrx3M5hTQkri8+CjQ HA6gXSkSm58zQ5QLSvyYfA9qvLzEvv1TWSFsLYn1O48zTWDkn4WkbBaSsllIyhYwMq9ilEwt KM5Nzy02KjDKSy3XK07MLS7NS9dLzs/dxAgM922Htfp3MD5eEn+IUYCDUYmHV0ORKUqINbGs uDL3EKMEB7OSCG+vPnOUEG9KYmVValF+fFFpTmrxIUZpDhYlcV7+/GORQgLpiSWp2ampBalF MFkmDk6pBsZ1881W/GRhPM/FeHRacc9KCZmEv1G6v073zj4xcY7ruVcfnmv1a/76un+foMW9 nyIq/3z7rT+uXd/RYZOw47TYNPMz6vOOsa28VeHulKA+gYUn32+Nwl0XU5dcbeP6trTX/o/F k0/V8nZs/M5uulJ5WfYd1TvvWKb9+D1fw2Vn48wfvBMe7bquxFKckWioxVxUnAgAHUcgJHMC AAA= X-CMS-MailID: 20171108165043epcas2p2508e32c074e66a2c08b9a006f248f37c X-Msg-Generator: CA CMS-TYPE: 102P X-CMS-RootMailID: 20171108165043epcas2p2508e32c074e66a2c08b9a006f248f37c X-RootMTR: 20171108165043epcas2p2508e32c074e66a2c08b9a006f248f37c References: <20171107102538.mzbfdxll3fpf2kqg@wfg-t540p.sh.intel.com> <7885793.0mqNGdeUvE@amdc3058> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wednesday, November 08, 2017 05:28:16 PM Bartlomiej Zolnierkiewicz wrote: > we can see that for some reason PIIX PCI IDE controller is probed > twice and later when we attach ide-cd driver to both instances of hdc > (in parallel) it ends up badly.. Actually it ends up badly later (I don't know exactly yet how we get into this situation but this is not that important as we know that the root problem starts much earlier with the double probe of PCI IDE host controller).. Best regards, -- Bartlomiej Zolnierkiewicz Samsung R&D Institute Poland Samsung Electronics