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software node: Allow node addition to already existing device

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If the node is added to an already exiting device, the node
needs to be also linked to the device separately.

This will make sure the reference count is kept in balance
also when the node is injected to a device afterwards.

Fixes: e68d0119e3 ("software node: Introduce device_add_software_node()")
Reported-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Cc: stable <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20210414075438.64547-1-heikki.krogerus@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Heikki Krogerus 2021-04-14 10:54:38 +03:00 committed by Greg Kroah-Hartman
parent 586c402882
commit b622b24519
1 changed files with 3 additions and 2 deletions
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5
drivers/base/swnode.c
View file

@ -1045,6 +1045,7 @@ int device_add_software_node(struct device *dev, const struct software_node *nod
}
set_secondary_fwnode(dev, &swnode->fwnode);
software_node_notify(dev, KOBJ_ADD);
return 0;
}
@ -1118,8 +1119,8 @@ int software_node_notify(struct device *dev, unsigned long action)
switch (action) {
case KOBJ_ADD:
ret = sysfs_create_link(&dev->kobj, &swnode->kobj,
"software_node");
ret = sysfs_create_link_nowarn(&dev->kobj, &swnode->kobj,
"software_node");
if (ret)
break;