aboutsummaryrefslogtreecommitdiff
diff options
context:
space:
mode:
-rw-r--r--drivers/base/core.c34
-rw-r--r--include/linux/device.h1
2 files changed, 35 insertions, 0 deletions
diff --git a/drivers/base/core.c b/drivers/base/core.c
index 5d4b7e04471..641c0c42bb4 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -197,6 +197,35 @@ static ssize_t store_uevent(struct device *dev, struct device_attribute *attr,
return count;
}
+static int device_add_groups(struct device *dev)
+{
+ int i;
+ int error = 0;
+
+ if (dev->groups) {
+ for (i = 0; dev->groups[i]; i++) {
+ error = sysfs_create_group(&dev->kobj, dev->groups[i]);
+ if (error) {
+ while (--i >= 0)
+ sysfs_remove_group(&dev->kobj, dev->groups[i]);
+ goto out;
+ }
+ }
+ }
+out:
+ return error;
+}
+
+static void device_remove_groups(struct device *dev)
+{
+ int i;
+ if (dev->groups) {
+ for (i = 0; dev->groups[i]; i++) {
+ sysfs_remove_group(&dev->kobj, dev->groups[i]);
+ }
+ }
+}
+
static ssize_t show_dev(struct device *dev, struct device_attribute *attr,
char *buf)
{
@@ -350,6 +379,8 @@ int device_add(struct device *dev)
sysfs_create_link(&dev->parent->kobj, &dev->kobj, class_name);
}
+ if ((error = device_add_groups(dev)))
+ goto GroupError;
if ((error = device_pm_add(dev)))
goto PMError;
if ((error = bus_add_device(dev)))
@@ -376,6 +407,8 @@ int device_add(struct device *dev)
BusError:
device_pm_remove(dev);
PMError:
+ device_remove_groups(dev);
+ GroupError:
if (dev->devt_attr) {
device_remove_file(dev, dev->devt_attr);
kfree(dev->devt_attr);
@@ -470,6 +503,7 @@ void device_del(struct device * dev)
up(&dev->class->sem);
}
device_remove_file(dev, &dev->uevent_attr);
+ device_remove_groups(dev);
/* Notify the platform of the removal, in case they
* need to do anything...
diff --git a/include/linux/device.h b/include/linux/device.h
index b3646462d6d..994d3ebd53f 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -344,6 +344,7 @@ struct device {
struct list_head node;
struct class *class; /* optional*/
dev_t devt; /* dev_t, creates the sysfs "dev" */
+ struct attribute_group **groups; /* optional groups */
void (*release)(struct device * dev);
};