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[PATCH] add sysfs attr to re-emit device hotplug event

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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>
This commit is contained in:
Kay Sievers
2005-10-01 14:49:43 +02:00
committed by Greg Kroah-Hartman
parent d8539d81ae
commit a7fd67062e
6 changed files with 110 additions and 32 deletions
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16
drivers/base/core.c
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@@ -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...