From patchwork Thu Sep 24 09:22:08 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Paolo Bonzini X-Patchwork-Id: 304553 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=-11.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, 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 6C459C4363D for ; Thu, 24 Sep 2020 09:48:30 +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 021242396E for ; Thu, 24 Sep 2020 09:48:29 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="eqGU+nS6" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 021242396E Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:56974 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kLNrY-0001Y3-VD for qemu-devel@archiver.kernel.org; Thu, 24 Sep 2020 05:48:28 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:38896) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kLNTk-0000vb-KV for qemu-devel@nongnu.org; Thu, 24 Sep 2020 05:23:52 -0400 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:54690) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1kLNTb-00061u-3M for qemu-devel@nongnu.org; Thu, 24 Sep 2020 05:23:52 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1600939422; 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=SMbLWkx++SRjJTxVHc7OGdAT7b6LdYR09l6M084Hgjs=; b=eqGU+nS6buxnKbT7RXMLE1jlSa1ds2C6w/tB8mmFbmHHp2kYKPwouk4a/f1/ngUOYg3Ggh jGvxHZwxK9hsxJuVUC3fajKtBuXq/QbciEXrHeunhoQqrkRuFFeJHWuu4UPB9ZtsXGfHA5 hTtgwkfyPVMNelNiWqIUwgkxcstTtFw= 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-383-rX2aqHD_OfSYtTrq8hsZhA-1; Thu, 24 Sep 2020 05:23:38 -0400 X-MC-Unique: rX2aqHD_OfSYtTrq8hsZhA-1 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 10645104D3E3; Thu, 24 Sep 2020 09:23:37 +0000 (UTC) Received: from virtlab701.virt.lab.eng.bos.redhat.com (virtlab701.virt.lab.eng.bos.redhat.com [10.19.152.228]) by smtp.corp.redhat.com (Postfix) with ESMTP id C0B1473662; Thu, 24 Sep 2020 09:23:36 +0000 (UTC) From: Paolo Bonzini To: qemu-devel@nongnu.org Subject: [PULL 26/92] hw: megasas: return -1 when 'megasas_map_sgl' fails Date: Thu, 24 Sep 2020 05:22:08 -0400 Message-Id: <20200924092314.1722645-27-pbonzini@redhat.com> In-Reply-To: <20200924092314.1722645-1-pbonzini@redhat.com> References: <20200924092314.1722645-1-pbonzini@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=pbonzini@redhat.com X-Mimecast-Spam-Score: 0.001 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=216.205.24.124; envelope-from=pbonzini@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/09/22 23:02:20 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -32 X-Spam_score: -3.3 X-Spam_bar: --- X-Spam_report: (-3.3 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1.228, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H5=0.001, RCVD_IN_MSPIKE_WL=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: Li Qiang Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" From: Li Qiang The caller of 'megasas_map_sgl' will only check if the return is zero or not. If it return 0 it means success, as in the next patch we will consider 'iov_count=0' is an error, so let's return -1 to indicate a failure. Signed-off-by: Li Qiang Message-Id: <20200815141940.44025-2-liq3ea@163.com> Signed-off-by: Paolo Bonzini --- hw/scsi/megasas.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/hw/scsi/megasas.c b/hw/scsi/megasas.c index e90c00823a..4cc709d2c6 100644 --- a/hw/scsi/megasas.c +++ b/hw/scsi/megasas.c @@ -280,7 +280,7 @@ static int megasas_map_sgl(MegasasState *s, MegasasCmd *cmd, union mfi_sgl *sgl) if (iov_count > MEGASAS_MAX_SGE) { trace_megasas_iovec_sgl_overflow(cmd->index, iov_count, MEGASAS_MAX_SGE); - return iov_count; + return -1; } pci_dma_sglist_init(&cmd->qsg, PCI_DEVICE(s), iov_count); for (i = 0; i < iov_count; i++) { @@ -310,7 +310,7 @@ static int megasas_map_sgl(MegasasState *s, MegasasCmd *cmd, union mfi_sgl *sgl) return 0; unmap: qemu_sglist_destroy(&cmd->qsg); - return iov_count - i; + return -1; } /*