From patchwork Tue Mar 9 16:52:21 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Julian Wiedmann X-Patchwork-Id: 12126135 X-Patchwork-Delegate: kuba@kernel.org 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=-16.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8B80DC43332 for ; Tue, 9 Mar 2021 16:53:31 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 597506523A for ; Tue, 9 Mar 2021 16:53:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230521AbhCIQw5 (ORCPT ); Tue, 9 Mar 2021 11:52:57 -0500 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:43882 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229799AbhCIQwc (ORCPT ); Tue, 9 Mar 2021 11:52:32 -0500 Received: from pps.filterd (m0098410.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.43/8.16.0.43) with SMTP id 129GXhRO118720; Tue, 9 Mar 2021 11:52:31 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-transfer-encoding; s=pp1; bh=5T+Sq8LYiE/LvGRDzrvRmOF3q8OXC6+wA8m0VnDb+ww=; b=Ooby4WFjkK4FDDl9smrpEbw0mSdtEk+TdFNyr4gHBXxE5qvW4AA1ShjcDjvzSwBOfwV5 iIrzoYdFu3AHEBXZsd5pQJYxxoymcaPoGH/iSM48SpA2pPEbIeBV4Kkvk4Ur/BJDLAZz Shn+8O020Z7bbxvMlbkqABMdwxxB9/6nZrkHaRSdwU0AahqYM4XkaHWN+1tTw9XW19jC 4hMg35d/J1mul6YP3AUkq1IM52lYu/B2BHePlq5c2Ug4o8dQRd4TnM9n8rF7tmJWAN0F OyDw2m3hU8Re7wzHryXNTwLGVVqN/3x7XsrGvO3w2SXOlU5qToKTNvL6ZFmLWJSKYvjI mw== Received: from ppma06ams.nl.ibm.com (66.31.33a9.ip4.static.sl-reverse.com [169.51.49.102]) by mx0a-001b2d01.pphosted.com with ESMTP id 3762wrb00v-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 09 Mar 2021 11:52:30 -0500 Received: from pps.filterd (ppma06ams.nl.ibm.com [127.0.0.1]) by ppma06ams.nl.ibm.com (8.16.0.43/8.16.0.43) with SMTP id 129Gi5Mx013907; Tue, 9 Mar 2021 16:52:28 GMT Received: from b06cxnps3074.portsmouth.uk.ibm.com (d06relay09.portsmouth.uk.ibm.com [9.149.109.194]) by ppma06ams.nl.ibm.com with ESMTP id 3768urr70c-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 09 Mar 2021 16:52:28 +0000 Received: from d06av21.portsmouth.uk.ibm.com (d06av21.portsmouth.uk.ibm.com [9.149.105.232]) by b06cxnps3074.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 129GqP3L42140102 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 9 Mar 2021 16:52:25 GMT Received: from d06av21.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id C570C5204E; Tue, 9 Mar 2021 16:52:25 +0000 (GMT) Received: from tuxmaker.boeblingen.de.ibm.com (unknown [9.152.85.9]) by d06av21.portsmouth.uk.ibm.com (Postfix) with ESMTP id 7F23252050; Tue, 9 Mar 2021 16:52:25 +0000 (GMT) From: Julian Wiedmann To: David Miller , Jakub Kicinski Cc: linux-netdev , linux-s390 , Heiko Carstens , Karsten Graul , Julian Wiedmann Subject: [PATCH net 4/4] s390/qeth: fix notification for pending buffers during teardown Date: Tue, 9 Mar 2021 17:52:21 +0100 Message-Id: <20210309165221.1735641-5-jwi@linux.ibm.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210309165221.1735641-1-jwi@linux.ibm.com> References: <20210309165221.1735641-1-jwi@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.369,18.0.761 definitions=2021-03-09_13:2021-03-08,2021-03-09 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 impostorscore=0 bulkscore=0 adultscore=0 spamscore=0 malwarescore=0 priorityscore=1501 suspectscore=0 phishscore=0 clxscore=1015 mlxlogscore=999 mlxscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2103090081 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org The cited commit reworked the state machine for pending TX buffers. In qeth_iqd_tx_complete() it turned PENDING into a transient state, and uses NEED_QAOB for buffers that get parked while waiting for their QAOB completion. But it missed to adjust the check in qeth_tx_complete_buf(). So if qeth_tx_complete_pending_bufs() is called during teardown to drain the parked TX buffers, we no longer raise a notification for af_iucv. Instead of updating the checked state, just move this code into qeth_tx_complete_pending_bufs() itself. This also gets rid of the special-case in the common TX completion path. Fixes: 8908f36d20d8 ("s390/qeth: fix af_iucv notification race") Signed-off-by: Julian Wiedmann --- drivers/s390/net/qeth_core_main.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/s390/net/qeth_core_main.c b/drivers/s390/net/qeth_core_main.c index d0a56afec028..a814698387bc 100644 --- a/drivers/s390/net/qeth_core_main.c +++ b/drivers/s390/net/qeth_core_main.c @@ -1390,9 +1390,6 @@ static void qeth_tx_complete_buf(struct qeth_qdio_out_buffer *buf, bool error, struct qeth_qdio_out_q *queue = buf->q; struct sk_buff *skb; - if (atomic_read(&buf->state) == QETH_QDIO_BUF_PENDING) - qeth_notify_skbs(queue, buf, TX_NOTIFY_GENERALERROR); - /* Empty buffer? */ if (buf->next_element_to_fill == 0) return; @@ -1465,6 +1462,9 @@ static void qeth_tx_complete_pending_bufs(struct qeth_card *card, QETH_CARD_TEXT(card, 5, "fp"); QETH_CARD_TEXT_(card, 5, "%lx", (long) buf); + if (drain) + qeth_notify_skbs(queue, buf, + TX_NOTIFY_GENERALERROR); qeth_tx_complete_buf(buf, drain, 0); list_del(&buf->list_entry);