From patchwork Tue Aug 31 15:54:10 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Marchand X-Patchwork-Id: 97624 X-Patchwork-Delegate: maxime.coquelin@redhat.com Return-Path: X-Original-To: patchwork@inbox.dpdk.org Delivered-To: patchwork@inbox.dpdk.org Received: from mails.dpdk.org (mails.dpdk.org [217.70.189.124]) by inbox.dpdk.org (Postfix) with ESMTP id 94F68A0C46; Tue, 31 Aug 2021 17:54:59 +0200 (CEST) Received: from [217.70.189.124] (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id 80458410D8; Tue, 31 Aug 2021 17:54:59 +0200 (CEST) Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by mails.dpdk.org (Postfix) with ESMTP id 896B9410D8 for ; Tue, 31 Aug 2021 17:54:58 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1630425298; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=X2DUIQz7gUQ8l3txRyoi7vhObEIIiislSiIGitt5WEw=; b=SlcDzuUV8gxozkZSF/a8xCWh2963nKIRy9Ln6UCtU+43ZRwVNPnKE1ONY4DwXaC87pnYUL Tw+MoskHEF4As3fcfxybiI5r1wTiwjXJQw4w6RxOu58Zu62mZs/8XudHlpcPPc6hiO0gj+ /ELYeBMVTETJWE+okuMiaX9kR51eHyk= 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-434-xHWNzNlKP52Q-JGvMl4Ypg-1; Tue, 31 Aug 2021 11:54:55 -0400 X-MC-Unique: xHWNzNlKP52Q-JGvMl4Ypg-1 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id DA3AC107ACF5; Tue, 31 Aug 2021 15:54:53 +0000 (UTC) Received: from dmarchan.remote.csb (unknown [10.40.192.182]) by smtp.corp.redhat.com (Postfix) with ESMTP id 8B29E60CC9; Tue, 31 Aug 2021 15:54:49 +0000 (UTC) From: David Marchand To: dev@dpdk.org Cc: stable@dpdk.org, Maxime Coquelin , Chenbo Xia , Jianfeng Tan , Yuanhan Liu Date: Tue, 31 Aug 2021 17:54:10 +0200 Message-Id: <20210831155411.17672-2-david.marchand@redhat.com> In-Reply-To: <20210831155411.17672-1-david.marchand@redhat.com> References: <20210830151313.25481-1-david.marchand@redhat.com> <20210831155411.17672-1-david.marchand@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=david.marchand@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Subject: [dpdk-dev] [PATCH v2 1/2] net/virtio: reconfigure LSC handler when required X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" There is no reason to re-register a interrupt handler for LSC if this feature was not requested in the first place. A simple usecase is when asking for Rx interrupts without LSC interrupt. Fixes: 26b683b4f7d0 ("net/virtio: setup Rx queue interrupts") Cc: stable@dpdk.org Signed-off-by: David Marchand Reviewed-by: Maxime Coquelin --- drivers/net/virtio/virtio_ethdev.c | 16 +++++++++------- 1 file changed, 9 insertions(+), 7 deletions(-) diff --git a/drivers/net/virtio/virtio_ethdev.c b/drivers/net/virtio/virtio_ethdev.c index e58085a2c9..314a291e8c 100644 --- a/drivers/net/virtio/virtio_ethdev.c +++ b/drivers/net/virtio/virtio_ethdev.c @@ -1684,13 +1684,15 @@ virtio_configure_intr(struct rte_eth_dev *dev) } } - /* Re-register callback to update max_intr */ - rte_intr_callback_unregister(dev->intr_handle, - virtio_interrupt_handler, - dev); - rte_intr_callback_register(dev->intr_handle, - virtio_interrupt_handler, - dev); + if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC) { + /* Re-register callback to update max_intr */ + rte_intr_callback_unregister(dev->intr_handle, + virtio_interrupt_handler, + dev); + rte_intr_callback_register(dev->intr_handle, + virtio_interrupt_handler, + dev); + } /* DO NOT try to remove this! This function will enable msix, or QEMU * will encounter SIGSEGV when DRIVER_OK is sent.