From patchwork Tue Dec 1 15:52:09 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Falcon X-Patchwork-Id: 1408906 Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [203.11.71.2]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 4ClmtQ6sT6z9sVq for ; Wed, 2 Dec 2020 02:56:30 +1100 (AEDT) Authentication-Results: ozlabs.org; dmarc=fail (p=none dis=none) header.from=linux.ibm.com Authentication-Results: ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=ibm.com header.i=@ibm.com header.a=rsa-sha256 header.s=pp1 header.b=h2fUV4e0; dkim-atps=neutral Received: from bilbo.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 4ClmtQ6QS2zDqjZ for ; 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Tue, 01 Dec 2020 15:52:21 +0000 Received: from b01ledav005.gho.pok.ibm.com (b01ledav005.gho.pok.ibm.com [9.57.199.110]) by b01cxnp22034.gho.pok.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 0B1FqKEE46858668 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 1 Dec 2020 15:52:20 GMT Received: from b01ledav005.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 96267AE060; Tue, 1 Dec 2020 15:52:20 +0000 (GMT) Received: from b01ledav005.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 32525AE067; Tue, 1 Dec 2020 15:52:19 +0000 (GMT) Received: from oc7186267434.ibm.com (unknown [9.160.5.242]) by b01ledav005.gho.pok.ibm.com (Postfix) with ESMTP; Tue, 1 Dec 2020 15:52:19 +0000 (GMT) From: Thomas Falcon To: kuba@kernel.org Subject: [PATCH net v3 0/2] ibmvnic: Bug fixes for queue descriptor processing Date: Tue, 1 Dec 2020 09:52:09 -0600 Message-Id: <1606837931-22676-1-git-send-email-tlfalcon@linux.ibm.com> X-Mailer: git-send-email 1.8.3.1 X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.312, 18.0.737 definitions=2020-12-01_07:2020-11-30, 2020-12-01 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxscore=0 lowpriorityscore=0 malwarescore=0 clxscore=1015 suspectscore=1 bulkscore=0 spamscore=0 adultscore=0 impostorscore=0 mlxlogscore=999 priorityscore=1501 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2012010097 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: cforno12@linux.ibm.com, ljp@linux.vnet.ibm.com, ricklind@linux.ibm.com, dnbanerg@us.ibm.com, tlfalcon@linux.ibm.com, drt@linux.vnet.ibm.com, netdev@vger.kernel.org, brking@linux.vnet.ibm.com, sukadev@linux.vnet.ibm.com, linuxppc-dev@lists.ozlabs.org Errors-To: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" This series resolves a few issues in the ibmvnic driver's RX buffer and TX completion processing. The first patch includes memory barriers to synchronize queue descriptor reads. The second patch fixes a memory leak that could occur if the device returns a TX completion with an error code in the descriptor, in which case the respective socket buffer and other relevant data structures may not be freed or updated properly. v3: Correct length of Fixes tags, requested by Jakub Kicinski v2: Provide more detailed comments explaining specifically what reads are being ordered, suggested by Michael Ellerman Thomas Falcon (2): ibmvnic: Ensure that SCRQ entry reads are correctly ordered ibmvnic: Fix TX completion error handling drivers/net/ethernet/ibm/ibmvnic.c | 22 +++++++++++++++++++--- 1 file changed, 19 insertions(+), 3 deletions(-)