From nobody Wed Oct 29 06:47:19 2025 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail(p=none dis=none) header.from=redhat.com Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1524738962149690.2974434288959; Thu, 26 Apr 2018 03:36:02 -0700 (PDT) Received: from localhost ([::1]:41379 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fBeFt-00068W-GR for importer@patchew.org; Thu, 26 Apr 2018 06:36:01 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:36800) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fBeEc-0005Rb-QT for qemu-devel@nongnu.org; Thu, 26 Apr 2018 06:34:43 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fBeEY-0004jV-Sv for qemu-devel@nongnu.org; Thu, 26 Apr 2018 06:34:42 -0400 Received: from mx3-rdu2.redhat.com ([66.187.233.73]:54066 helo=mx1.redhat.com) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1fBeEY-0004jA-PW; Thu, 26 Apr 2018 06:34:38 -0400 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.rdu2.redhat.com [10.11.54.4]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 510E1401D7BA; Thu, 26 Apr 2018 10:34:38 +0000 (UTC) Received: from t460s.redhat.com (ovpn-116-193.ams2.redhat.com [10.36.116.193]) by smtp.corp.redhat.com (Postfix) with ESMTP id D5B57202323B; Thu, 26 Apr 2018 10:34:30 +0000 (UTC) From: David Hildenbrand To: qemu-devel@nongnu.org Date: Thu, 26 Apr 2018 12:34:30 +0200 Message-Id: <20180426103430.768-1-david@redhat.com> X-Scanned-By: MIMEDefang 2.78 on 10.11.54.4 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.6]); Thu, 26 Apr 2018 10:34:38 +0000 (UTC) X-Greylist: inspected by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.6]); Thu, 26 Apr 2018 10:34:38 +0000 (UTC) for IP:'10.11.54.4' DOMAIN:'int-mx04.intmail.prod.int.rdu2.redhat.com' HELO:'smtp.corp.redhat.com' FROM:'david@redhat.com' RCPT:'' X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 66.187.233.73 Subject: [Qemu-devel] [PATCH v1] pc-dimm: fix error messages if no slots were defined 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: Pankaj Gupta , Eduardo Habkost , "Michael S . Tsirkin" , David Hildenbrand , Markus Armbruster , Alexander Graf , qemu-s390x@nongnu.org, qemu-ppc@nongnu.org, Paolo Bonzini , Marcel Apfelbaum , Igor Mammedov , David Gibson , Richard Henderson Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" If not slots were defined we try to allocate an empty bitmap, which fails. Signed-off-by: David Hildenbrand --- This fixes the queued patch "exec: Allow memory regions with size 0" hw/mem/pc-dimm.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/hw/mem/pc-dimm.c b/hw/mem/pc-dimm.c index 0119c68e01..f2c140947d 100644 --- a/hw/mem/pc-dimm.c +++ b/hw/mem/pc-dimm.c @@ -118,9 +118,15 @@ static int pc_dimm_slot2bitmap(Object *obj, void *opaq= ue) =20 int pc_dimm_get_free_slot(const int *hint, int max_slots, Error **errp) { - unsigned long *bitmap =3D bitmap_new(max_slots); + unsigned long *bitmap; int slot =3D 0; =20 + if (max_slots <=3D 0) { + error_setg(errp, "no free slots available"); + return slot; + } + + bitmap =3D bitmap_new(max_slots); object_child_foreach(qdev_get_machine(), pc_dimm_slot2bitmap, bitmap); =20 /* check if requested slot is not occupied */ --=20 2.14.3