From patchwork Thu Jul 2 08:21:28 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kishon Vijay Abraham I X-Patchwork-Id: 1321058 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=linux-pci-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=pass (p=quarantine dis=none) header.from=ti.com Authentication-Results: ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=ti.com header.i=@ti.com header.a=rsa-sha256 header.s=ti-com-17Q1 header.b=jqWlLeQ9; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 49yB132qXVz9sTN for ; Thu, 2 Jul 2020 18:22:47 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728413AbgGBIWp (ORCPT ); Thu, 2 Jul 2020 04:22:45 -0400 Received: from lelv0142.ext.ti.com ([198.47.23.249]:59442 "EHLO lelv0142.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728405AbgGBIWo (ORCPT ); Thu, 2 Jul 2020 04:22:44 -0400 Received: from fllv0034.itg.ti.com ([10.64.40.246]) by lelv0142.ext.ti.com (8.15.2/8.15.2) with ESMTP id 0628MVLp081794; Thu, 2 Jul 2020 03:22:31 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1593678151; bh=IPYADznch2oF3OT/2Ql57mNeeC/uA2ZY2VCc9l5fLDQ=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=jqWlLeQ9s6a2LzJ90q0eTRXI5o1EmG8SozWZzBplGqsuBatOB7Zko1A+JOTHZj22m 9DGm7+CujGMVyKRoLMYgkJHUNzoFaqWqAdgztVhdGI1jwaNFR+IxX+ZEnx9G/DHKPQ 2PbN+666Ca0qrF+bUCdRBfv2TAG8DeJST3AMvhxw= Received: from DFLE108.ent.ti.com (dfle108.ent.ti.com [10.64.6.29]) by fllv0034.itg.ti.com (8.15.2/8.15.2) with ESMTPS id 0628MV1X030784 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Thu, 2 Jul 2020 03:22:31 -0500 Received: from DFLE105.ent.ti.com (10.64.6.26) by DFLE108.ent.ti.com (10.64.6.29) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1979.3; Thu, 2 Jul 2020 03:22:31 -0500 Received: from lelv0327.itg.ti.com (10.180.67.183) by DFLE105.ent.ti.com (10.64.6.26) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1979.3 via Frontend Transport; Thu, 2 Jul 2020 03:22:31 -0500 Received: from a0393678ub.india.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by lelv0327.itg.ti.com (8.15.2/8.15.2) with ESMTP id 0628LiYJ006145; Thu, 2 Jul 2020 03:22:24 -0500 From: Kishon Vijay Abraham I To: Ohad Ben-Cohen , Bjorn Andersson , Jon Mason , Dave Jiang , Allen Hubbe , Lorenzo Pieralisi , Bjorn Helgaas , "Michael S. Tsirkin" , Jason Wang , Paolo Bonzini , Stefan Hajnoczi , Stefano Garzarella CC: , , , , , , , Subject: [RFC PATCH 07/22] virtio_pci: Use request_threaded_irq() instead of request_irq() Date: Thu, 2 Jul 2020 13:51:28 +0530 Message-ID: <20200702082143.25259-8-kishon@ti.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200702082143.25259-1-kishon@ti.com> References: <20200702082143.25259-1-kishon@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org Some of the virtio drivers (like virtio_rpmsg_bus.c) use sleeping functions like mutex_*() in the virtqueue callback. Use request_threaded_irq() instead of request_irq() in order for the virtqueue callbacks to be executed in thread context instead of interrupt context. Signed-off-by: Kishon Vijay Abraham I --- drivers/virtio/virtio_pci_common.c | 25 +++++++++++++------------ 1 file changed, 13 insertions(+), 12 deletions(-) diff --git a/drivers/virtio/virtio_pci_common.c b/drivers/virtio/virtio_pci_common.c index 222d630c41fc..60998b4f1f30 100644 --- a/drivers/virtio/virtio_pci_common.c +++ b/drivers/virtio/virtio_pci_common.c @@ -140,9 +140,9 @@ static int vp_request_msix_vectors(struct virtio_device *vdev, int nvectors, v = vp_dev->msix_used_vectors; snprintf(vp_dev->msix_names[v], sizeof *vp_dev->msix_names, "%s-config", name); - err = request_irq(pci_irq_vector(vp_dev->pci_dev, v), - vp_config_changed, 0, vp_dev->msix_names[v], - vp_dev); + err = request_threaded_irq(pci_irq_vector(vp_dev->pci_dev, v), 0, + vp_config_changed, 0, vp_dev->msix_names[v], + vp_dev); if (err) goto error; ++vp_dev->msix_used_vectors; @@ -159,9 +159,9 @@ static int vp_request_msix_vectors(struct virtio_device *vdev, int nvectors, v = vp_dev->msix_used_vectors; snprintf(vp_dev->msix_names[v], sizeof *vp_dev->msix_names, "%s-virtqueues", name); - err = request_irq(pci_irq_vector(vp_dev->pci_dev, v), - vp_vring_interrupt, 0, vp_dev->msix_names[v], - vp_dev); + err = request_threaded_irq(pci_irq_vector(vp_dev->pci_dev, v), + 0, vp_vring_interrupt, 0, + vp_dev->msix_names[v], vp_dev); if (err) goto error; ++vp_dev->msix_used_vectors; @@ -336,10 +336,11 @@ static int vp_find_vqs_msix(struct virtio_device *vdev, unsigned nvqs, sizeof *vp_dev->msix_names, "%s-%s", dev_name(&vp_dev->vdev.dev), names[i]); - err = request_irq(pci_irq_vector(vp_dev->pci_dev, msix_vec), - vring_interrupt, 0, - vp_dev->msix_names[msix_vec], - vqs[i]); + err = request_threaded_irq(pci_irq_vector(vp_dev->pci_dev, + msix_vec), + 0, vring_interrupt, 0, + vp_dev->msix_names[msix_vec], + vqs[i]); if (err) goto error_find; } @@ -361,8 +362,8 @@ static int vp_find_vqs_intx(struct virtio_device *vdev, unsigned nvqs, if (!vp_dev->vqs) return -ENOMEM; - err = request_irq(vp_dev->pci_dev->irq, vp_interrupt, IRQF_SHARED, - dev_name(&vdev->dev), vp_dev); + err = request_threaded_irq(vp_dev->pci_dev->irq, 0, vp_interrupt, + IRQF_SHARED, dev_name(&vdev->dev), vp_dev); if (err) goto out_del_vqs;