From patchwork Mon Jan 21 14:54:07 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Farhan Ali X-Patchwork-Id: 10773953 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 65AB01390 for ; Mon, 21 Jan 2019 14:54:16 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 547F229ADF for ; Mon, 21 Jan 2019 14:54:16 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 4828929B35; Mon, 21 Jan 2019 14:54:16 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id DB6D129ADF for ; Mon, 21 Jan 2019 14:54:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729732AbfAUOyP (ORCPT ); Mon, 21 Jan 2019 09:54:15 -0500 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:36046 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1729474AbfAUOyO (ORCPT ); Mon, 21 Jan 2019 09:54:14 -0500 Received: from pps.filterd (m0098421.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.27/8.16.0.27) with SMTP id x0LEhptd145556 for ; Mon, 21 Jan 2019 09:54:13 -0500 Received: from e15.ny.us.ibm.com (e15.ny.us.ibm.com [129.33.205.205]) by mx0a-001b2d01.pphosted.com with ESMTP id 2q5epvvjqv-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Mon, 21 Jan 2019 09:54:13 -0500 Received: from localhost by e15.ny.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Mon, 21 Jan 2019 14:54:12 -0000 Received: from b01cxnp22033.gho.pok.ibm.com (9.57.198.23) by e15.ny.us.ibm.com (146.89.104.202) with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Mon, 21 Jan 2019 14:54:10 -0000 Received: from b01ledav003.gho.pok.ibm.com (b01ledav003.gho.pok.ibm.com [9.57.199.108]) by b01cxnp22033.gho.pok.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id x0LEs9Qw25690244 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 21 Jan 2019 14:54:09 GMT Received: from b01ledav003.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 7AC6DB2073; Mon, 21 Jan 2019 14:54:09 +0000 (GMT) Received: from b01ledav003.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 5D065B2077; Mon, 21 Jan 2019 14:54:09 +0000 (GMT) Received: from alifm-ThinkPad-T470p.ibm.com (unknown [9.85.173.103]) by b01ledav003.gho.pok.ibm.com (Postfix) with ESMTPS; Mon, 21 Jan 2019 14:54:09 +0000 (GMT) From: Farhan Ali To: kvm@vger.kernel.org, linux-s390@vger.kernel.org Cc: cohuck@redhat.com, pasic@linux.ibm.com, farman@linux.ibm.com Subject: [RFC v1 0/2] Small vfio-ccw fixes Date: Mon, 21 Jan 2019 09:54:07 -0500 X-Mailer: git-send-email 2.7.4 X-TM-AS-GCONF: 00 x-cbid: 19012114-0068-0000-0000-000003861A2C X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00010448; HX=3.00000242; KW=3.00000007; PH=3.00000004; SC=3.00000275; SDB=6.01149703; UDB=6.00599082; IPR=6.00930028; MB=3.00025222; MTD=3.00000008; XFM=3.00000015; UTC=2019-01-21 14:54:11 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 19012114-0069-0000-0000-00004736B5FA Message-Id: X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2019-01-21_08:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1011 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=326 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1901210116 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Hi, I have noticed some errors when running an intensive I/O workload on a passthrough DASD device. While debugging and looking through the code, I found 2 places where things don't look write. Thank you Farhan Farhan Ali (2): vfio-ccw: Don't assume there are more ccws after a TIC vfio-ccw: Don't exit early if state of the vfio-ccw subchannel is not idle drivers/s390/cio/vfio_ccw_cp.c | 2 +- drivers/s390/cio/vfio_ccw_ops.c | 2 -- 2 files changed, 1 insertion(+), 3 deletions(-)