From patchwork Fri Feb 19 13:17:10 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Auger Eric X-Patchwork-Id: 62335 Delivered-To: patches@linaro.org Received: by 10.112.43.199 with SMTP id y7csp1163033lbl; Fri, 19 Feb 2016 05:17:31 -0800 (PST) X-Received: by 10.194.189.231 with SMTP id gl7mr13017328wjc.162.1455887851036; Fri, 19 Feb 2016 05:17:31 -0800 (PST) Return-Path: Received: from mail-wm0-x230.google.com (mail-wm0-x230.google.com. [2a00:1450:400c:c09::230]) by mx.google.com with ESMTPS id c2si12692948wma.96.2016.02.19.05.17.30 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 19 Feb 2016 05:17:31 -0800 (PST) Received-SPF: pass (google.com: domain of eric.auger@linaro.org designates 2a00:1450:400c:c09::230 as permitted sender) client-ip=2a00:1450:400c:c09::230; Authentication-Results: mx.google.com; spf=pass (google.com: domain of eric.auger@linaro.org designates 2a00:1450:400c:c09::230 as permitted sender) smtp.mailfrom=eric.auger@linaro.org; dkim=pass header.i=@linaro.org Received: by mail-wm0-x230.google.com with SMTP id g62so70567815wme.0 for ; Fri, 19 Feb 2016 05:17:30 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=pXzNrC2sbKi30eO0A9FJZMSVT+FnA2xNQVmBZhMn8vU=; b=Ij/EYRcyG7RW+elGtWiNKHmp7W22oE9txrlisqKw4l2nIA7i/v7E+eRtqXTiSBnN61 BjcZfxjiDYki63MGcv537eaxmbWlmFmthjYVEXA6R3lAHLDbX/EslFDXBANBvF+FbJHG FfHyxxLIEPINb/OW3Bw0CPXDBmZlBBua0p7WE= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=pXzNrC2sbKi30eO0A9FJZMSVT+FnA2xNQVmBZhMn8vU=; b=mfgCsIdagL8tdrhJKEvps0i8aKm0TFJkQ/KgtGtoaxbUfbB2toHFiathx0rJKSk4f6 jbHbZGpUgH2uLqGMAeufba/GF8+LNju3UO32w3B1XFNqWVHvgZLxEd66BIVlKdVZ5WaY 516yuNLf6FvAtruclzQCfZn5cji2bZx6Oy6BygOsf/tVTC/cH1U0g4JMWGLkLRKj5T0P /Vy/aSgHbn7SfqnPfyyjxC1hjpYA5pnHuFpdOOI+9RGPhJveSWluJ6ssCGoDZptMa305 X2JxeowHJpXPgc7ew9AV+CYA/O3zHXYexWv7AmUbTRTDgdDxILyzL5NxneftDXQIU3nW Gr+w== X-Gm-Message-State: AG10YOTia33yxK9EySAxwOE6ZCCIQqsSTrdwwQEYScAXBz5Lf81xmOgZhDmA8iufa+6sUiWXSjk= X-Received: by 10.194.78.37 with SMTP id y5mr13074654wjw.78.1455887850860; Fri, 19 Feb 2016 05:17:30 -0800 (PST) Return-Path: Received: from midway01-04-00.lavalab ([81.128.185.50]) by smtp.gmail.com with ESMTPSA id bg1sm11229846wjc.27.2016.02.19.05.17.28 (version=TLS1_1 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Fri, 19 Feb 2016 05:17:29 -0800 (PST) From: Eric Auger To: eric.auger@st.com, eric.auger@linaro.org, qemu-devel@nongnu.org, qemu-arm@nongnu.org, peter.maydell@linaro.org, alex.williamson@redhat.com, david@gibson.dropbear.id.au Cc: christoffer.dall@linaro.org, suravee.suthikulpanit@amd.com, alex.bennee@linaro.org, thuth@redhat.com, crosthwaitepeter@gmail.com, patches@linaro.org, pbonzini@redhat.com, b.reynal@virtualopensystems.com, thomas.lendacky@amd.com Subject: [PATCH v8 5/8] device_tree: qemu_fdt_getprop_cell converted to use the error API Date: Fri, 19 Feb 2016 13:17:10 +0000 Message-Id: <1455887833-7306-6-git-send-email-eric.auger@linaro.org> X-Mailer: git-send-email 1.8.3.2 In-Reply-To: <1455887833-7306-1-git-send-email-eric.auger@linaro.org> References: <1455887833-7306-1-git-send-email-eric.auger@linaro.org> 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 --- v4 -> v5: - Add Peter's R-b - remove comment about error_fatal v3 : creation --- 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(-) -- 1.8.3.2 diff --git a/device_tree.c b/device_tree.c index 3d41c44..6204af8 100644 --- a/device_tree.c +++ b/device_tree.c @@ -350,15 +350,22 @@ 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);