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device: ignore NONE devices behind bridge 

Ignore NONE devices in dev_is_active_bridge that are commonly used to
indicate hotplug capable ports.

Tested on Lenovo T520:
The empty ExpressCard Slot is no longer marked as active bridge.

Change-Id: I23347270aaab17647023969091ce4bcdd41dd57a
Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/32441
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Philipp Deppenwiese <zaolin.daisuki@gmail.com>
This commit is contained in:
Patrick Rudolph 2019-04-24 09:35:51 +02:00 committed by Patrick Georgi
parent ac24d3c311
commit bd7739f3aa
1 changed files with 4 additions and 1 deletions
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5
src/device/device_util.c
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@ -628,7 +628,7 @@ void disable_children(struct bus *bus)
/*
* Returns true if the device is an enabled bridge that has at least
* one enabled device on its secondary bus.
* one enabled device on its secondary bus that is not of type NONE.
*/
bool dev_is_active_bridge(struct device *dev)
{
@ -643,6 +643,9 @@ bool dev_is_active_bridge(struct device *dev)
for (link = dev->link_list; link; link = link->next) {
for (child = link->children; child; child = child->sibling) {
if (child->path.type == DEVICE_PATH_NONE)
continue;
if (child->enabled)
return 1;
}