[PATCH] Add sysfs support for the IPMI device interface

Add support for sysfs to the IPMI device interface.

Clean-ups based on Dimitry Torokovs comment by Philipp Hahn.

Signed-off-by: Corey Minyard <minyard@acm.org>
Signed-off-by: Philipp Hahn <pmhahn@titan.lahn.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 18 insertions, 2 deletions

diff --git a/drivers/char/ipmi/ipmi_devintf.c b/drivers/char/ipmi/ipmi_devintf.c
index 49d67f5384a2..4bb9af736fba 100644
--- a/drivers/char/ipmi/ipmi_devintf.c
+++ b/drivers/char/ipmi/ipmi_devintf.c
@@ -44,6 +44,7 @@
 #include <linux/ipmi.h>
 #include <asm/semaphore.h>
 #include <linux/init.h>
+#include <linux/device.h>
 
 #define IPMI_DEVINTF_VERSION "v33"
 
@@ -519,15 +520,21 @@ MODULE_PARM_DESC(ipmi_major, "Sets the major number of the IPMI device.  By"
                  " interface.  Other values will set the major device number"
                  " to that value.");
 
+static struct class *ipmi_class;
+
 static void ipmi_new_smi(int if_num)
 {
-        devfs_mk_cdev(MKDEV(ipmi_major, if_num),
-                      S_IFCHR | S_IRUSR | S_IWUSR,
+        dev_t dev = MKDEV(ipmi_major, if_num);
+
+        devfs_mk_cdev(dev, S_IFCHR | S_IRUSR | S_IWUSR,
                       "ipmidev/%d", if_num);
+
+        class_simple_device_add(ipmi_class, dev, NULL, "ipmi%d", if_num);
 }
 
 static void ipmi_smi_gone(int if_num)
 {
+        class_simple_device_remove(ipmi_class, MKDEV(ipmi_major, if_num));
         devfs_remove("ipmidev/%d", if_num);
 }
 
@@ -548,8 +555,15 @@ static __init int init_ipmi_devintf(void)
         printk(KERN_INFO "ipmi device interface version "
                IPMI_DEVINTF_VERSION "\n");
 
+        ipmi_class = class_simple_create(THIS_MODULE, "ipmi");
+        if (IS_ERR(ipmi_class)) {
+                printk(KERN_ERR "ipmi: can't register device class\n");
+                return PTR_ERR(ipmi_class);
+        }
+
         rv = register_chrdev(ipmi_major, DEVICE_NAME, &ipmi_fops);
         if (rv < 0) {
+                class_simple_destroy(ipmi_class);
                 printk(KERN_ERR "ipmi: can't get major %d\n", ipmi_major);
                 return rv;
         }
@@ -563,6 +577,7 @@ static __init int init_ipmi_devintf(void)
         rv = ipmi_smi_watcher_register(&smi_watcher);
         if (rv) {
                 unregister_chrdev(ipmi_major, DEVICE_NAME);
+                class_simple_destroy(ipmi_class);
                 printk(KERN_WARNING "ipmi: can't register smi watcher\n");
                 return rv;
         }
@@ -573,6 +588,7 @@ module_init(init_ipmi_devintf);
 
 static __exit void cleanup_ipmi(void)
 {
+        class_simple_destroy(ipmi_class);
         ipmi_smi_watcher_unregister(&smi_watcher);
         devfs_remove(DEVICE_NAME);
         unregister_chrdev(ipmi_major, DEVICE_NAME);