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FROMGIT: driver core: Add fwnode_to_dev() to look up device from fwnode

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It's often useful to look up a device that corresponds to a fwnode. So
add an API to do that irrespective of the bus on which the device has
been added to.

Signed-off-by: Saravana Kannan <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

(cherry-picked from commit 372a67c0c5ef63f55bd1eb480d9555328d8ec0f2
 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core.git driver-core-next)

Bug: 141703324
Change-Id: I68c36177da083bfb04e73c1b754e740f40faf284
This commit is contained in:
Saravana Kannan 2019-09-04 14:11:20 -07:00
commit 58acf67e41
2 changed files with 9 additions and 0 deletions
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7
drivers/base/core.c
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@ -2198,6 +2198,10 @@ int device_add(struct device *dev)
BUS_NOTIFY_ADD_DEVICE, dev);
kobject_uevent(&dev->kobj, KOBJ_ADD);
if (dev->fwnode && !dev->fwnode->dev)
dev->fwnode->dev = dev;
bus_probe_device(dev);
if (parent)
klist_add_tail(&dev->p->knode_parent,
@ -2342,6 +2346,9 @@ void device_del(struct device *dev)
kill_device(dev);
device_unlock(dev);
if (dev->fwnode && dev->fwnode->dev == dev)
dev->fwnode->dev = NULL;
/* Notify clients of device removal. This call must come
* before dpm_sysfs_remove().
*/