From patchwork Fri Feb 9 10:03:50 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Julian Wiedmann X-Patchwork-Id: 871298 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=netdev-owner@vger.kernel.org; receiver=) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 3zd9fB0MLLz9s1h for ; Fri, 9 Feb 2018 21:04:50 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751099AbeBIKEs (ORCPT ); Fri, 9 Feb 2018 05:04:48 -0500 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:40390 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750973AbeBIKEr (ORCPT ); Fri, 9 Feb 2018 05:04:47 -0500 Received: from pps.filterd (m0098404.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.22/8.16.0.22) with SMTP id w19A4U5i087626 for ; Fri, 9 Feb 2018 05:04:46 -0500 Received: from e06smtp12.uk.ibm.com (e06smtp12.uk.ibm.com [195.75.94.108]) by mx0a-001b2d01.pphosted.com with ESMTP id 2g16sffu5s-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Fri, 09 Feb 2018 05:04:34 -0500 Received: from localhost by e06smtp12.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; Fri, 9 Feb 2018 10:04:05 -0000 Received: from d06av25.portsmouth.uk.ibm.com (d06av25.portsmouth.uk.ibm.com [9.149.105.61]) by b06cxnps3074.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id w19A45W830933080; Fri, 9 Feb 2018 10:04:05 GMT Received: from d06av25.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id E0A8C11C05C; Fri, 9 Feb 2018 09:57:24 +0000 (GMT) Received: from d06av25.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id AB55D11C04C; Fri, 9 Feb 2018 09:57:24 +0000 (GMT) Received: from tuxmaker.boeblingen.de.ibm.com (unknown [9.152.85.9]) by d06av25.portsmouth.uk.ibm.com (Postfix) with ESMTPS; Fri, 9 Feb 2018 09:57:24 +0000 (GMT) From: Julian Wiedmann To: David Miller Cc: , , Martin Schwidefsky , Heiko Carstens , Stefan Raspl , Ursula Braun , Julian Wiedmann Subject: [PATCH net 2/2] s390/qeth: fix SETIP command handling Date: Fri, 9 Feb 2018 11:03:50 +0100 X-Mailer: git-send-email 2.13.5 In-Reply-To: <20180209100350.60572-1-jwi@linux.vnet.ibm.com> References: <20180209100350.60572-1-jwi@linux.vnet.ibm.com> X-TM-AS-GCONF: 00 x-cbid: 18020910-0008-0000-0000-000004CB1AF9 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18020910-0009-0000-0000-00001E5ED1D2 Message-Id: <20180209100350.60572-3-jwi@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:, , definitions=2018-02-09_05:, , 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=1015 lowpriorityscore=0 impostorscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1709140000 definitions=main-1802090129 Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org send_control_data() applies some special handling to SETIP v4 IPA commands. But current code parses *all* command types for the SETIP command code. Limit the command code check to IPA commands. Fixes: 5b54e16f1a54 ("qeth: do not spin for SETIP ip assist command") Signed-off-by: Julian Wiedmann --- drivers/s390/net/qeth_core.h | 5 +++++ drivers/s390/net/qeth_core_main.c | 14 ++++++++------ 2 files changed, 13 insertions(+), 6 deletions(-) diff --git a/drivers/s390/net/qeth_core.h b/drivers/s390/net/qeth_core.h index c33fbc4c2e91..959c65cf75d9 100644 --- a/drivers/s390/net/qeth_core.h +++ b/drivers/s390/net/qeth_core.h @@ -591,6 +591,11 @@ struct qeth_cmd_buffer { void (*callback) (struct qeth_channel *, struct qeth_cmd_buffer *); }; +static inline struct qeth_ipa_cmd *__ipa_cmd(struct qeth_cmd_buffer *iob) +{ + return (struct qeth_ipa_cmd *)(iob->data + IPA_PDU_HEADER_SIZE); +} + /** * definition of a qeth channel, used for read and write */ diff --git a/drivers/s390/net/qeth_core_main.c b/drivers/s390/net/qeth_core_main.c index 6abd3bc285e4..ca72f3311004 100644 --- a/drivers/s390/net/qeth_core_main.c +++ b/drivers/s390/net/qeth_core_main.c @@ -2120,7 +2120,7 @@ int qeth_send_control_data(struct qeth_card *card, int len, unsigned long flags; struct qeth_reply *reply = NULL; unsigned long timeout, event_timeout; - struct qeth_ipa_cmd *cmd; + struct qeth_ipa_cmd *cmd = NULL; QETH_CARD_TEXT(card, 2, "sendctl"); @@ -2146,10 +2146,13 @@ int qeth_send_control_data(struct qeth_card *card, int len, while (atomic_cmpxchg(&card->write.irq_pending, 0, 1)) ; qeth_prepare_control_data(card, len, iob); - if (IS_IPA(iob->data)) + if (IS_IPA(iob->data)) { + cmd = __ipa_cmd(iob); event_timeout = QETH_IPA_TIMEOUT; - else + } else { event_timeout = QETH_TIMEOUT; + } + timeout = jiffies + event_timeout; QETH_CARD_TEXT(card, 6, "noirqpnd"); @@ -2174,9 +2177,8 @@ int qeth_send_control_data(struct qeth_card *card, int len, /* we have only one long running ipassist, since we can ensure process context of this command we can sleep */ - cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE); - if ((cmd->hdr.command == IPA_CMD_SETIP) && - (cmd->hdr.prot_version == QETH_PROT_IPV4)) { + if (cmd && cmd->hdr.command == IPA_CMD_SETIP && + cmd->hdr.prot_version == QETH_PROT_IPV4) { if (!wait_event_timeout(reply->wait_q, atomic_read(&reply->received), event_timeout)) goto time_err;