shinys000114/linux
1
0
Fork 0
mirror of https://github.com/hardkernel/linux.git synced 2026-06-05 18:41:58 +09:00
Code Issues Packages Projects Releases Wiki Activity

FROMGIT: of: property: Skip adding device links to suppliers that aren't devices

Browse Source 
Some devices need to be initialized really early and can't wait for
driver core or drivers to be functional.  These devices are typically
initialized without creating a struct device for their device nodes.

If a supplier ends up being one of these devices, skip trying to add
device links to them.

Signed-off-by: Saravana Kannan <saravanak@google.com>
Link: https://lore.kernel.org/r/20191028220027.251605-6-saravanak@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
(cherry-pick from commit 15956dad5c
 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core.git driver-core-next)
Bug: 143308885
Change-Id: I0d5a38eec05f5546fe11c23c0d09103ccc35097e
This commit is contained in:
Saravana Kannan
2019-10-28 15:00:26 -07:00
parent aefd2d632e
commit c5634733fa
1 changed files with 3 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/of/property.c
View File

@@ -1024,6 +1024,7 @@ static int of_link_to_phandle(struct device *dev, struct device_node *sup_np,
struct device *sup_dev;
int ret = 0;
struct device_node *tmp_np = sup_np;
int is_populated;
of_node_get(sup_np);
/*
@@ -1048,9 +1049,10 @@ static int of_link_to_phandle(struct device *dev, struct device_node *sup_np,
return -EINVAL;
}
sup_dev = get_dev_from_fwnode(&sup_np->fwnode);
is_populated = of_node_check_flag(sup_np, OF_POPULATED);
of_node_put(sup_np);
if (!sup_dev)
return -EAGAIN;
return is_populated ? 0 : -EAGAIN;
if (!device_link_add(dev, sup_dev, dl_flags))
ret = -EAGAIN;
put_device(sup_dev);