This is a note to let you know that I've just added the patch titled

software node: Allow node addition to already existing device

to my driver-core git tree which can be found at git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core.git in the driver-core-testing branch.

The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.)

The patch will be merged to the driver-core-next branch sometime soon, after it passes testing, and the merge window is open.

If you have any questions about this process, please let me know.

From b622b24519f5b008f6d4e20e5675eaffa8fbd87b Mon Sep 17 00:00:00 2001

From: Heikki Krogerus heikki.krogerus@linux.intel.com Date: Wed, 14 Apr 2021 10:54:38 +0300 Subject: software node: Allow node addition to already existing device

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: e68d0119e328 ("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... Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/base/swnode.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/base/swnode.c b/drivers/base/swnode.c index 740333629b42..3cc11b813f28 100644 --- a/drivers/base/swnode.c +++ b/drivers/base/swnode.c @@ -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;