From patchwork Tue Jun 29 15:27:34 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nitesh Narayan Lal X-Patchwork-Id: 12350205 X-Patchwork-Delegate: bhelgaas@google.com 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=-16.2 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=ham 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 A3260C11F68 for ; Tue, 29 Jun 2021 15:28:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8DDE361DE2 for ; Tue, 29 Jun 2021 15:28:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234719AbhF2PbX (ORCPT ); Tue, 29 Jun 2021 11:31:23 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:59275 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234750AbhF2PbU (ORCPT ); Tue, 29 Jun 2021 11:31:20 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1624980533; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=yYHuenJYgR7jtuCWCYvc0qdRH5XTlfnj11MyvxR9Vw0=; b=b5ocsrOp0S/5yos3oRpvIOSGO9YMPjvTV5099vXUb0RvyvWGZLJtqVSLK46ZgCPXW5tEK/ QYv7c32oPeidJghPLlXufCw7lVq6TrfDj3EmEavI/x40CrK9CtN5TG5uNmwCV8znYvNKne bOvx8+KJwHxMHoNSVM/LDwPtyU1N5U8= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-476-R6wXnvmjPYyWP4jz-QcAuQ-1; Tue, 29 Jun 2021 11:28:50 -0400 X-MC-Unique: R6wXnvmjPYyWP4jz-QcAuQ-1 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 85B6980430A; Tue, 29 Jun 2021 15:28:45 +0000 (UTC) Received: from virtlab719.virt.lab.eng.bos.redhat.com (virtlab719.virt.lab.eng.bos.redhat.com [10.19.153.15]) by smtp.corp.redhat.com (Postfix) with ESMTP id CA40C604CC; Tue, 29 Jun 2021 15:28:21 +0000 (UTC) From: Nitesh Narayan Lal To: linux-kernel@vger.kernel.org, linux-scsi@vger.kernel.org, intel-wired-lan@lists.osuosl.org, netdev@vger.kernel.org, linux-api@vger.kernel.org, linux-pci@vger.kernel.org, tglx@linutronix.de, jesse.brandeburg@intel.com, robin.murphy@arm.com, mtosatti@redhat.com, mingo@kernel.org, jbrandeb@kernel.org, frederic@kernel.org, juri.lelli@redhat.com, abelits@marvell.com, bhelgaas@google.com, rostedt@goodmis.org, peterz@infradead.org, davem@davemloft.net, akpm@linux-foundation.org, sfr@canb.auug.org.au, stephen@networkplumber.org, rppt@linux.vnet.ibm.com, chris.friesen@windriver.com, maz@kernel.org, nhorman@tuxdriver.com, pjwaskiewicz@gmail.com, sassmann@redhat.com, thenzl@redhat.com, kashyap.desai@broadcom.com, sumit.saxena@broadcom.com, shivasharan.srikanteshwara@broadcom.com, sathya.prakash@broadcom.com, sreekanth.reddy@broadcom.com, suganath-prabu.subramani@broadcom.com, james.smart@broadcom.com, dick.kennedy@broadcom.com, jkc@redhat.com, faisal.latif@intel.com, shiraz.saleem@intel.com, tariqt@nvidia.com, ahleihel@redhat.com, kheib@redhat.com, borisp@nvidia.com, saeedm@nvidia.com, benve@cisco.com, govind@gmx.com, jassisinghbrar@gmail.com, ajit.khaparde@broadcom.com, sriharsha.basavapatna@broadcom.com, somnath.kotur@broadcom.com, nilal@redhat.com, tatyana.e.nikolova@intel.com, mustafa.ismail@intel.com, ahs3@redhat.com, leonro@nvidia.com Subject: [PATCH v2 02/14] iavf: Use irq_update_affinity_hint Date: Tue, 29 Jun 2021 11:27:34 -0400 Message-Id: <20210629152746.2953364-3-nitesh@redhat.com> In-Reply-To: <20210629152746.2953364-1-nitesh@redhat.com> References: <20210629152746.2953364-1-nitesh@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org The driver uses irq_set_affinity_hint() for two purposes: - To set the affinity_hint which is consumed by the userspace for distributing the interrupts - To apply an affinity that it provides for the iavf interrupts The latter is done to ensure that all the interrupts are evenly spread across all available CPUs. However, since commit a0c9259dc4e1 ("irq/matrix: Spread interrupts on allocation") the spreading of interrupts is dynamically performed at the time of allocation. Hence, there is no need for the drivers to enforce their own affinity for the spreading of interrupts. Also, irq_set_affinity_hint() applying the provided cpumask as an affinity for the interrupt is an undocumented side effect. To remove this side effect irq_set_affinity_hint() has been marked as deprecated and new interfaces have been introduced. Hence, replace the irq_set_affinity_hint() with the new interface irq_update_affinity_hint() that only sets the pointer for the affinity_hint. Signed-off-by: Nitesh Narayan Lal --- drivers/net/ethernet/intel/iavf/iavf_main.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/net/ethernet/intel/iavf/iavf_main.c b/drivers/net/ethernet/intel/iavf/iavf_main.c index e612c24fa384..f2e8fab53cb9 100644 --- a/drivers/net/ethernet/intel/iavf/iavf_main.c +++ b/drivers/net/ethernet/intel/iavf/iavf_main.c @@ -449,10 +449,10 @@ iavf_request_traffic_irqs(struct iavf_adapter *adapter, char *basename) irq_set_affinity_notifier(irq_num, &q_vector->affinity_notify); /* Spread the IRQ affinity hints across online CPUs. Note that * get_cpu_mask returns a mask with a permanent lifetime so - * it's safe to use as a hint for irq_set_affinity_hint. + * it's safe to use as a hint for irq_update_affinity_hint. */ cpu = cpumask_local_spread(q_vector->v_idx, -1); - irq_set_affinity_hint(irq_num, get_cpu_mask(cpu)); + irq_update_affinity_hint(irq_num, get_cpu_mask(cpu)); } return 0; @@ -462,7 +462,7 @@ iavf_request_traffic_irqs(struct iavf_adapter *adapter, char *basename) vector--; irq_num = adapter->msix_entries[vector + NONQ_VECS].vector; irq_set_affinity_notifier(irq_num, NULL); - irq_set_affinity_hint(irq_num, NULL); + irq_update_affinity_hint(irq_num, NULL); free_irq(irq_num, &adapter->q_vectors[vector]); } return err; @@ -514,7 +514,7 @@ static void iavf_free_traffic_irqs(struct iavf_adapter *adapter) for (vector = 0; vector < q_vectors; vector++) { irq_num = adapter->msix_entries[vector + NONQ_VECS].vector; irq_set_affinity_notifier(irq_num, NULL); - irq_set_affinity_hint(irq_num, NULL); + irq_update_affinity_hint(irq_num, NULL); free_irq(irq_num, &adapter->q_vectors[vector]); } }