ARM: mmp: fix potential NULL dereference
[linux/fpc-iii.git] / arch / x86 / platform / uv / uv_sysfs.c
blob5d4ba301e776eb238e1d8e3736c7fb3fa6fb824c
1 /*
2 * This file supports the /sys/firmware/sgi_uv interfaces for SGI UV.
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 * Copyright (c) 2008 Silicon Graphics, Inc. All Rights Reserved.
19 * Copyright (c) Russ Anderson
22 #include <linux/device.h>
23 #include <asm/uv/bios.h>
24 #include <asm/uv/uv.h>
26 struct kobject *sgi_uv_kobj;
28 static ssize_t partition_id_show(struct kobject *kobj,
29 struct kobj_attribute *attr, char *buf)
31 return snprintf(buf, PAGE_SIZE, "%ld\n", sn_partition_id);
34 static ssize_t coherence_id_show(struct kobject *kobj,
35 struct kobj_attribute *attr, char *buf)
37 return snprintf(buf, PAGE_SIZE, "%ld\n", partition_coherence_id());
40 static struct kobj_attribute partition_id_attr =
41 __ATTR(partition_id, S_IRUGO, partition_id_show, NULL);
43 static struct kobj_attribute coherence_id_attr =
44 __ATTR(coherence_id, S_IRUGO, coherence_id_show, NULL);
47 static int __init sgi_uv_sysfs_init(void)
49 unsigned long ret;
51 if (!is_uv_system())
52 return -ENODEV;
54 if (!sgi_uv_kobj)
55 sgi_uv_kobj = kobject_create_and_add("sgi_uv", firmware_kobj);
56 if (!sgi_uv_kobj) {
57 printk(KERN_WARNING "kobject_create_and_add sgi_uv failed\n");
58 return -EINVAL;
61 ret = sysfs_create_file(sgi_uv_kobj, &partition_id_attr.attr);
62 if (ret) {
63 printk(KERN_WARNING "sysfs_create_file partition_id failed\n");
64 return ret;
67 ret = sysfs_create_file(sgi_uv_kobj, &coherence_id_attr.attr);
68 if (ret) {
69 printk(KERN_WARNING "sysfs_create_file coherence_id failed\n");
70 return ret;
73 return 0;
76 device_initcall(sgi_uv_sysfs_init);