From patchwork Sat Feb 25 08:26:41 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Cao jin X-Patchwork-Id: 9591539 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id C3AF46042C for ; Sat, 25 Feb 2017 08:30:07 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id AAD27286B0 for ; Sat, 25 Feb 2017 08:30:07 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 9D674286E2; Sat, 25 Feb 2017 08:30:07 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 0FE79286B0 for ; Sat, 25 Feb 2017 08:30:07 +0000 (UTC) Received: from localhost ([::1]:41769 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1chXjy-0003Bp-7j for patchwork-qemu-devel@patchwork.kernel.org; Sat, 25 Feb 2017 03:30:06 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:51280) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1chXa2-0001Vg-7q for qemu-devel@nongnu.org; Sat, 25 Feb 2017 03:19:51 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1chXa1-0008UM-CQ for qemu-devel@nongnu.org; Sat, 25 Feb 2017 03:19:50 -0500 Received: from [59.151.112.132] (port=45078 helo=heian.cn.fujitsu.com) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1chXa0-0008R1-Tv for qemu-devel@nongnu.org; Sat, 25 Feb 2017 03:19:49 -0500 X-IronPort-AV: E=Sophos;i="5.22,518,1449504000"; d="scan'208";a="15950445" Received: from unknown (HELO cn.fujitsu.com) ([10.167.33.5]) by heian.cn.fujitsu.com with ESMTP; 25 Feb 2017 16:19:24 +0800 Received: from G08CNEXCHPEKD03.g08.fujitsu.local (unknown [10.167.33.85]) by cn.fujitsu.com (Postfix) with ESMTP id 2942247C4E82; Sat, 25 Feb 2017 16:19:22 +0800 (CST) Received: from G08FNSTD140223.g08.fujitsu.local (10.167.226.69) by G08CNEXCHPEKD03.g08.fujitsu.local (10.167.33.89) with Microsoft SMTP Server (TLS) id 14.3.319.2; Sat, 25 Feb 2017 16:19:21 +0800 From: Cao jin To: Date: Sat, 25 Feb 2017 16:26:41 +0800 Message-ID: <1488011202-32121-8-git-send-email-caoj.fnst@cn.fujitsu.com> X-Mailer: git-send-email 2.1.0 In-Reply-To: <1488011202-32121-1-git-send-email-caoj.fnst@cn.fujitsu.com> References: <1488011202-32121-1-git-send-email-caoj.fnst@cn.fujitsu.com> MIME-Version: 1.0 X-Originating-IP: [10.167.226.69] X-yoursite-MailScanner-ID: 2942247C4E82.A9245 X-yoursite-MailScanner: Found to be clean X-yoursite-MailScanner-From: caoj.fnst@cn.fujitsu.com X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 59.151.112.132 Subject: [Qemu-devel] [PATCH v10 7/8] msi_init: convert assert to return -errno X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Marcel Apfelbaum , Markus Armbruster , "Michael S. Tsirkin" Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP According to the disscussion: http://lists.nongnu.org/archive/html/qemu-devel/2016-09/msg08215.html Let leaf function returns reasonable -errno, let caller decide how to handle the return value. Suggested-by: Markus Armbruster CC: Markus Armbruster CC: Michael S. Tsirkin CC: Marcel Apfelbaum Reviewed-by: Markus Armbruster Reviewed-by: Marcel Apfelbaum Signed-off-by: Cao jin --- hw/pci/msi.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff --git a/hw/pci/msi.c b/hw/pci/msi.c index a87b2278a373..af3efbe525ce 100644 --- a/hw/pci/msi.c +++ b/hw/pci/msi.c @@ -201,9 +201,12 @@ int msi_init(struct PCIDevice *dev, uint8_t offset, " 64bit %d mask %d\n", offset, nr_vectors, msi64bit, msi_per_vector_mask); - assert(!(nr_vectors & (nr_vectors - 1))); /* power of 2 */ - assert(nr_vectors > 0); - assert(nr_vectors <= PCI_MSI_VECTORS_MAX); + /* vector sanity test: should in range 1 - 32, should be power of 2 */ + if (!is_power_of_2(nr_vectors) || nr_vectors > PCI_MSI_VECTORS_MAX) { + error_setg(errp, "Invalid vector number: %d", nr_vectors); + return -EINVAL; + } + /* the nr of MSI vectors is up to 32 */ vectors_order = ctz32(nr_vectors);