From patchwork Thu Feb 18 20:06:43 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alex Williamson X-Patchwork-Id: 584910 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org 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 ozlabs.org (Postfix) with ESMTPS id 4C38F14030F for ; Fri, 19 Feb 2016 07:14:36 +1100 (AEDT) Received: from localhost ([::1]:45140 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aWUyA-0006rc-F1 for incoming@patchwork.ozlabs.org; Thu, 18 Feb 2016 15:14:34 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:55321) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aWUqc-0001SY-B5 for qemu-devel@nongnu.org; Thu, 18 Feb 2016 15:06:52 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1aWUqa-00009B-Sj for qemu-devel@nongnu.org; Thu, 18 Feb 2016 15:06:46 -0500 Received: from mx1.redhat.com ([209.132.183.28]:42520) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aWUqa-00008r-LL for qemu-devel@nongnu.org; Thu, 18 Feb 2016 15:06:44 -0500 Received: from int-mx14.intmail.prod.int.phx2.redhat.com (int-mx14.intmail.prod.int.phx2.redhat.com [10.5.11.27]) by mx1.redhat.com (Postfix) with ESMTPS id 51C51C0005D2; Thu, 18 Feb 2016 20:06:44 +0000 (UTC) Received: from gimli.home (ovpn-113-102.phx2.redhat.com [10.3.113.102]) by int-mx14.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id u1IK6hoa002844; Thu, 18 Feb 2016 15:06:43 -0500 From: Alex Williamson To: qemu-devel@nongnu.org Date: Thu, 18 Feb 2016 13:06:43 -0700 Message-ID: <20160218200643.29220.75246.stgit@gimli.home> In-Reply-To: <20160218200419.29220.39836.stgit@gimli.home> References: <20160218200419.29220.39836.stgit@gimli.home> User-Agent: StGit/0.17.1-dirty MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.68 on 10.5.11.27 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x X-Received-From: 209.132.183.28 Cc: Peter Crosthwaite , Eric Auger Subject: [Qemu-devel] [PULL 10/13] device_tree: qemu_fdt_getprop_cell converted to use the error API X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org From: Eric Auger This patch aligns the prototype with qemu_fdt_getprop. The caller can choose whether the function self-asserts on error (passing &error_fatal as Error ** argument, corresponding to the legacy behavior), or behaves differently such as simply output a message. In this later case the caller can use the new lenp parameter to interpret the error if any. Signed-off-by: Eric Auger Reviewed-by: Peter Crosthwaite Signed-off-by: Alex Williamson --- device_tree.c | 21 ++++++++++++++------- hw/arm/boot.c | 6 ++++-- hw/arm/vexpress.c | 6 ++++-- include/sysemu/device_tree.h | 14 +++++++++++++- 4 files changed, 35 insertions(+), 12 deletions(-) diff --git a/device_tree.c b/device_tree.c index c93a615..2a40711 100644 --- a/device_tree.c +++ b/device_tree.c @@ -347,15 +347,22 @@ const void *qemu_fdt_getprop(void *fdt, const char *node_path, } uint32_t qemu_fdt_getprop_cell(void *fdt, const char *node_path, - const char *property) + const char *property, int *lenp, Error **errp) { int len; - const uint32_t *p = qemu_fdt_getprop(fdt, node_path, property, &len, - &error_fatal); - if (len != 4) { - error_report("%s: %s/%s not 4 bytes long (not a cell?)", - __func__, node_path, property); - exit(1); + const uint32_t *p; + + if (!lenp) { + lenp = &len; + } + p = qemu_fdt_getprop(fdt, node_path, property, lenp, errp); + if (!p) { + return 0; + } else if (*lenp != 4) { + error_setg(errp, "%s: %s/%s not 4 bytes long (not a cell?)", + __func__, node_path, property); + *lenp = -EINVAL; + return 0; } return be32_to_cpu(*p); } diff --git a/hw/arm/boot.c b/hw/arm/boot.c index cce8c7c..0a56d34c 100644 --- a/hw/arm/boot.c +++ b/hw/arm/boot.c @@ -437,8 +437,10 @@ static int load_dtb(hwaddr addr, const struct arm_boot_info *binfo, return 0; } - acells = qemu_fdt_getprop_cell(fdt, "/", "#address-cells"); - scells = qemu_fdt_getprop_cell(fdt, "/", "#size-cells"); + acells = qemu_fdt_getprop_cell(fdt, "/", "#address-cells", + NULL, &error_fatal); + scells = qemu_fdt_getprop_cell(fdt, "/", "#size-cells", + NULL, &error_fatal); if (acells == 0 || scells == 0) { fprintf(stderr, "dtb file invalid (#address-cells or #size-cells 0)\n"); goto fail; diff --git a/hw/arm/vexpress.c b/hw/arm/vexpress.c index 3154aea..726c4e0 100644 --- a/hw/arm/vexpress.c +++ b/hw/arm/vexpress.c @@ -478,8 +478,10 @@ static void vexpress_modify_dtb(const struct arm_boot_info *info, void *fdt) uint32_t acells, scells, intc; const VEDBoardInfo *daughterboard = (const VEDBoardInfo *)info; - acells = qemu_fdt_getprop_cell(fdt, "/", "#address-cells"); - scells = qemu_fdt_getprop_cell(fdt, "/", "#size-cells"); + acells = qemu_fdt_getprop_cell(fdt, "/", "#address-cells", + NULL, &error_fatal); + scells = qemu_fdt_getprop_cell(fdt, "/", "#size-cells", + NULL, &error_fatal); intc = find_int_controller(fdt); if (!intc) { /* Not fatal, we just won't provide virtio. This will diff --git a/include/sysemu/device_tree.h b/include/sysemu/device_tree.h index 48bf3b5..705650a 100644 --- a/include/sysemu/device_tree.h +++ b/include/sysemu/device_tree.h @@ -67,8 +67,20 @@ int qemu_fdt_setprop_phandle(void *fdt, const char *node_path, const void *qemu_fdt_getprop(void *fdt, const char *node_path, const char *property, int *lenp, Error **errp); +/** + * qemu_fdt_getprop_cell: retrieve the value of a given 4 byte property + * @fdt: pointer to the device tree blob + * @node_path: node path + * @property: name of the property to find + * @lenp: fdt error if any or -EINVAL if the property size is different from + * 4 bytes, or 4 (expected length of the property) upon success. + * @errp: handle to an error object + * + * returns the property value on success + */ uint32_t qemu_fdt_getprop_cell(void *fdt, const char *node_path, - const char *property); + const char *property, int *lenp, + Error **errp); uint32_t qemu_fdt_get_phandle(void *fdt, const char *path); uint32_t qemu_fdt_alloc_phandle(void *fdt); int qemu_fdt_nop_node(void *fdt, const char *node_path);