From patchwork Sat Jan 22 02:59:20 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sukadev Bhattiprolu X-Patchwork-Id: 12720402 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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5D851C433EF for ; Sat, 22 Jan 2022 02:59:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232047AbiAVC7b (ORCPT ); Fri, 21 Jan 2022 21:59:31 -0500 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:41524 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S230127AbiAVC72 (ORCPT ); Fri, 21 Jan 2022 21:59:28 -0500 Received: from pps.filterd (m0098414.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.1.2/8.16.1.2) with SMTP id 20M1fvkT003905 for ; Sat, 22 Jan 2022 02:59:26 GMT 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=faw7dETCcS/skdReFmupfDoZB+Cp3EQYgePHRyUXNEE=; b=Oqtn1GMkziAkFz4x0890eEr5R/8s8ap5LerpQaW8iqFf3FArSwphsXeh8I1RF1z3Bt0F IgK+VLY1Ce+TZP151LgZIJDkrFvZiQpS8SEN1vGeM/HDehXDhuzD0ow2bh1yJ1PJMcg7 EKW8PXPAv3BHXCkj9nsWbkXfCokb4KSTNfwxvZlt7wIj1u43XfMQr+DQkdCParorrCGG YRXLy6KZ7VpbbPe7riwzbfQq0d57QKyLs8tuISEf/oiIliMt08V4JatzMxJgVi+iQKzW URSG4P2xNkkJNB752D39Up3PAg8vwDDI+ZLKpeeDd5PwPvm/LE2pEta5CzRktQVCtx+t WQ== Received: from ppma01wdc.us.ibm.com (fd.55.37a9.ip4.static.sl-reverse.com [169.55.85.253]) by mx0b-001b2d01.pphosted.com with ESMTP id 3dr8g1rx60-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT) for ; Sat, 22 Jan 2022 02:59:26 +0000 Received: from pps.filterd (ppma01wdc.us.ibm.com [127.0.0.1]) by ppma01wdc.us.ibm.com (8.16.1.2/8.16.1.2) with SMTP id 20M2wDmj027086 for ; Sat, 22 Jan 2022 02:59:25 GMT Received: from b01cxnp22036.gho.pok.ibm.com (b01cxnp22036.gho.pok.ibm.com [9.57.198.26]) by ppma01wdc.us.ibm.com with ESMTP id 3dr9j8g100-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT) for ; Sat, 22 Jan 2022 02:59:25 +0000 Received: from b01ledav001.gho.pok.ibm.com (b01ledav001.gho.pok.ibm.com [9.57.199.106]) by b01cxnp22036.gho.pok.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 20M2xO9a7406552 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Sat, 22 Jan 2022 02:59:24 GMT Received: from b01ledav001.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 8A1222805A; Sat, 22 Jan 2022 02:59:24 +0000 (GMT) Received: from b01ledav001.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id DB0C428060; Sat, 22 Jan 2022 02:59:23 +0000 (GMT) Received: from suka-w540.ibmuc.com (unknown [9.77.135.77]) by b01ledav001.gho.pok.ibm.com (Postfix) with ESMTP; Sat, 22 Jan 2022 02:59:23 +0000 (GMT) From: Sukadev Bhattiprolu To: netdev@vger.kernel.org Cc: Brian King , Dany Madden , Rick Lindsley Subject: [PATCH net 3/4] ibmvnic: don't spin in tasklet Date: Fri, 21 Jan 2022 18:59:20 -0800 Message-Id: <20220122025921.199446-3-sukadev@linux.ibm.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20220122025921.199446-1-sukadev@linux.ibm.com> References: <20220122025921.199446-1-sukadev@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-GUID: 7tU7GqqQhj_WxIA8qVRZ6cH9BD-enICY X-Proofpoint-ORIG-GUID: 7tU7GqqQhj_WxIA8qVRZ6cH9BD-enICY X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.816,Hydra:6.0.425,FMLib:17.11.62.513 definitions=2022-01-21_10,2022-01-21_01,2021-12-02_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 mlxscore=0 bulkscore=0 adultscore=0 impostorscore=0 priorityscore=1501 clxscore=1015 malwarescore=0 phishscore=0 spamscore=0 suspectscore=0 mlxlogscore=998 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2201110000 definitions=main-2201220010 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org ibmvnic_tasklet() continuously spins waiting for responses to all capability requests. It does this to avoid encountering an error during initialization of the vnic. However if there is a bug in the VIOS and we do not receive a response to one or more queries the tasklet ends up spinning continuously leading to hard lock ups. If we fail to receive a message from the VIOS it is reasonable to timeout the login attempt rather than spin indefinitely in the tasklet. Fixes: 249168ad07cd ("ibmvnic: Make CRQ interrupt tasklet wait for all capabilities crqs") Signed-off-by: Sukadev Bhattiprolu Reviewed-by: Dany Madden --- drivers/net/ethernet/ibm/ibmvnic.c | 6 ------ 1 file changed, 6 deletions(-) diff --git a/drivers/net/ethernet/ibm/ibmvnic.c b/drivers/net/ethernet/ibm/ibmvnic.c index acd488310bbc..682a440151a8 100644 --- a/drivers/net/ethernet/ibm/ibmvnic.c +++ b/drivers/net/ethernet/ibm/ibmvnic.c @@ -5491,12 +5491,6 @@ static void ibmvnic_tasklet(struct tasklet_struct *t) ibmvnic_handle_crq(crq, adapter); crq->generic.first = 0; } - - /* remain in tasklet until all - * capabilities responses are received - */ - if (!adapter->wait_capability) - done = true; } /* if capabilities CRQ's were sent in this tasklet, the following * tasklet must wait until all responses are received