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authorKay Sievers <kay.sievers@suse.de>2005-10-01 14:49:43 +0200
committerGreg Kroah-Hartman <gregkh@suse.de>2005-10-28 09:52:51 -0700
commita7fd67062efc5b0fc9a61368c607fa92d1d57f9e (patch)
tree8b91f198640608bd99f4e4764394e5134220abcf /drivers/base
parentd8539d81aeee4dbdc0624a798321e822fb2df7ae (diff)
downloadop-kernel-dev-a7fd67062efc5b0fc9a61368c607fa92d1d57f9e.zip
op-kernel-dev-a7fd67062efc5b0fc9a61368c607fa92d1d57f9e.tar.gz
[PATCH] add sysfs attr to re-emit device hotplug event
A "coldplug + udevstart" can be simple like this: for i in /sys/block/*/*/uevent; do echo 1 > $i; done for i in /sys/class/*/*/uevent; do echo 1 > $i; done for i in /sys/bus/*/devices/*/uevent; do echo 1 > $i; done Signed-off-by: Kay Sievers <kay.sievers@suse.de> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/base')
-rw-r--r--drivers/base/class.c16
-rw-r--r--drivers/base/core.c16
2 files changed, 30 insertions, 2 deletions
diff --git a/drivers/base/class.c b/drivers/base/class.c
index 73d44cf..3cf6eb3 100644
--- a/drivers/base/class.c
+++ b/drivers/base/class.c
@@ -442,6 +442,13 @@ static ssize_t show_dev(struct class_device *class_dev, char *buf)
return print_dev_t(buf, class_dev->devt);
}
+static ssize_t store_uevent(struct class_device *class_dev,
+ const char *buf, size_t count)
+{
+ kobject_hotplug(&class_dev->kobj, KOBJ_ADD);
+ return count;
+}
+
void class_device_initialize(struct class_device *class_dev)
{
kobj_set_kset_s(class_dev, class_obj_subsys);
@@ -497,6 +504,12 @@ int class_device_add(struct class_device *class_dev)
goto register_done;
/* add the needed attributes to this device */
+ class_dev->uevent_attr.attr.name = "uevent";
+ class_dev->uevent_attr.attr.mode = S_IWUSR;
+ class_dev->uevent_attr.attr.owner = parent->owner;
+ class_dev->uevent_attr.store = store_uevent;
+ class_device_create_file(class_dev, &class_dev->uevent_attr);
+
if (MAJOR(class_dev->devt)) {
struct class_device_attribute *attr;
attr = kzalloc(sizeof(*attr), GFP_KERNEL);
@@ -505,12 +518,10 @@ int class_device_add(struct class_device *class_dev)
kobject_del(&class_dev->kobj);
goto register_done;
}
-
attr->attr.name = "dev";
attr->attr.mode = S_IRUGO;
attr->attr.owner = parent->owner;
attr->show = show_dev;
- attr->store = NULL;
class_device_create_file(class_dev, attr);
class_dev->devt_attr = attr;
}
@@ -621,6 +632,7 @@ void class_device_del(struct class_device *class_dev)
sysfs_remove_link(&class_dev->kobj, "device");
sysfs_remove_link(&class_dev->dev->kobj, class_name);
}
+ class_device_remove_file(class_dev, &class_dev->uevent_attr);
if (class_dev->devt_attr)
class_device_remove_file(class_dev, class_dev->devt_attr);
class_device_remove_attrs(class_dev);
diff --git a/drivers/base/core.c b/drivers/base/core.c
index 3110919..ac4b5fd 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -154,6 +154,13 @@ static struct kset_hotplug_ops device_hotplug_ops = {
.hotplug = dev_hotplug,
};
+static ssize_t store_uevent(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ kobject_hotplug(&dev->kobj, KOBJ_ADD);
+ return count;
+}
+
/**
* device_subsys - structure to be registered with kobject core.
*/
@@ -259,6 +266,14 @@ int device_add(struct device *dev)
if ((error = kobject_add(&dev->kobj)))
goto Error;
+
+ dev->uevent_attr.attr.name = "uevent";
+ dev->uevent_attr.attr.mode = S_IWUSR;
+ if (dev->driver)
+ dev->uevent_attr.attr.owner = dev->driver->owner;
+ dev->uevent_attr.store = store_uevent;
+ device_create_file(dev, &dev->uevent_attr);
+
kobject_hotplug(&dev->kobj, KOBJ_ADD);
if ((error = device_pm_add(dev)))
goto PMError;
@@ -350,6 +365,7 @@ void device_del(struct device * dev)
if (parent)
klist_del(&dev->knode_parent);
+ device_remove_file(dev, &dev->uevent_attr);
/* Notify the platform of the removal, in case they
* need to do anything...
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