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Driver core: fix deprectated sysfs structure for nested class devices

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Nested class devices used to have 'device' symlink point to a real
(physical) device instead of a parent class device.  When converting
subsystems to struct device we need to keep doing what class devices did if
CONFIG_SYSFS_DEPRECATED is Y, otherwise parts of udev break.

Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Cc: Kay Sievers <kay.sievers@vrfy.org>
Acked-by: Greg KH <greg@kroah.com>
Tested-by: Anssi Hannula <anssi.hannula@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Dmitry Torokhov 2007-09-18 22:46:50 -07:00 committed by Linus Torvalds
parent 508a92741a
commit 4f01a757e7
1 changed files with 23 additions and 6 deletions
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29
drivers/base/core.c
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@ -679,14 +679,26 @@ static int device_add_class_symlinks(struct device *dev)
goto out_subsys;
}
if (dev->parent) {
error = sysfs_create_link(&dev->kobj, &dev->parent->kobj,
"device");
if (error)
goto out_busid;
#ifdef CONFIG_SYSFS_DEPRECATED
{
char * class_name = make_class_name(dev->class->name,
&dev->kobj);
struct device *parent = dev->parent;
char *class_name;
/*
* In old sysfs stacked class devices had 'device'
* link pointing to real device instead of parent
*/
while (parent->class && !parent->bus && parent->parent)
parent = parent->parent;
error = sysfs_create_link(&dev->kobj,
&parent->kobj,
"device");
if (error)
goto out_busid;
class_name = make_class_name(dev->class->name,
&dev->kobj);
if (class_name)
error = sysfs_create_link(&dev->parent->kobj,
&dev->kobj, class_name);
@ -694,6 +706,11 @@ static int device_add_class_symlinks(struct device *dev)
if (error)
goto out_device;
}
#else
error = sysfs_create_link(&dev->kobj, &dev->parent->kobj,
"device");
if (error)
goto out_busid;
#endif
}
return 0;