From patchwork Thu Oct 14 00:48:47 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Longpeng(Mike)" X-Patchwork-Id: 12557597 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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 420ADC433FE for ; Thu, 14 Oct 2021 00:51:51 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id C80F1610E5 for ; Thu, 14 Oct 2021 00:51:50 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org C80F1610E5 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=huawei.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=nongnu.org Received: from localhost ([::1]:51402 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1maoyL-0001Xt-Tt for qemu-devel@archiver.kernel.org; Wed, 13 Oct 2021 20:51:49 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:50116) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1maow2-000752-S0 for qemu-devel@nongnu.org; Wed, 13 Oct 2021 20:49:26 -0400 Received: from szxga01-in.huawei.com ([45.249.212.187]:3484) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1maovz-0003FS-0z for qemu-devel@nongnu.org; Wed, 13 Oct 2021 20:49:26 -0400 Received: from dggemv703-chm.china.huawei.com (unknown [172.30.72.54]) by szxga01-in.huawei.com (SkyGuard) with ESMTP id 4HV9jP6WyYzWlZ2; Thu, 14 Oct 2021 08:47:37 +0800 (CST) Received: from dggpeml100016.china.huawei.com (7.185.36.216) by dggemv703-chm.china.huawei.com (10.3.19.46) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2308.8; Thu, 14 Oct 2021 08:49:16 +0800 Received: from DESKTOP-27KDQMV.china.huawei.com (10.174.148.223) by dggpeml100016.china.huawei.com (7.185.36.216) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2308.8; Thu, 14 Oct 2021 08:49:15 +0800 From: "Longpeng(Mike)" To: , Subject: [PATCH v4 1/6] vfio: simplify the conditional statements in vfio_msi_enable Date: Thu, 14 Oct 2021 08:48:47 +0800 Message-ID: <20211014004852.1293-2-longpeng2@huawei.com> X-Mailer: git-send-email 2.25.0.windows.1 In-Reply-To: <20211014004852.1293-1-longpeng2@huawei.com> References: <20211014004852.1293-1-longpeng2@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.174.148.223] X-ClientProxiedBy: dggems703-chm.china.huawei.com (10.3.19.180) To dggpeml100016.china.huawei.com (7.185.36.216) X-CFilter-Loop: Reflected Received-SPF: pass client-ip=45.249.212.187; envelope-from=longpeng2@huawei.com; helo=szxga01-in.huawei.com X-Spam_score_int: -41 X-Spam_score: -4.2 X-Spam_bar: ---- X-Spam_report: (-4.2 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_MED=-2.3, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: "Longpeng\(Mike\)" , arei.gonglei@huawei.com, qemu-devel@nongnu.org, kvm@vger.kernel.org Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" It's unnecessary to test against the specific return value of VFIO_DEVICE_SET_IRQS, since any positive return is an error indicating the number of vectors we should retry with. Signed-off-by: Longpeng(Mike) --- hw/vfio/pci.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c index 4feaa1c..c1fba40 100644 --- a/hw/vfio/pci.c +++ b/hw/vfio/pci.c @@ -650,7 +650,7 @@ retry: if (ret) { if (ret < 0) { error_report("vfio: Error: Failed to setup MSI fds: %m"); - } else if (ret != vdev->nr_vectors) { + } else { error_report("vfio: Error: Failed to enable %d " "MSI vectors, retry with %d", vdev->nr_vectors, ret); } @@ -668,7 +668,7 @@ retry: g_free(vdev->msi_vectors); vdev->msi_vectors = NULL; - if (ret > 0 && ret != vdev->nr_vectors) { + if (ret > 0) { vdev->nr_vectors = ret; goto retry; }