[PATCH v1 1/2] driver core: Add device_is_dependent() to linux/device.h

From: Saravana Kannan
Date: Fri Jun 05 2020 - 20:36:03 EST


DT implementation of fw_devlink needs this function to detect cycles. So
make it available.

Signed-off-by: Saravana Kannan <saravanak@xxxxxxxxxx>
---
drivers/base/core.c | 2 +-
include/linux/device.h | 1 +
2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/base/core.c b/drivers/base/core.c
index 139cdf7e7327..509b13610b56 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -118,7 +118,7 @@ int device_links_read_lock_held(void)
* Check if @target depends on @dev or any device dependent on it (its child or
* its consumer etc). Return 1 if that is the case or 0 otherwise.
*/
-static int device_is_dependent(struct device *dev, void *target)
+int device_is_dependent(struct device *dev, void *target)
{
struct device_link *link;
int ret;
diff --git a/include/linux/device.h b/include/linux/device.h
index ac8e37cd716a..5c618effc51e 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -829,6 +829,7 @@ extern int device_change_owner(struct device *dev, kuid_t kuid, kgid_t kgid);
extern const char *device_get_devnode(struct device *dev,
umode_t *mode, kuid_t *uid, kgid_t *gid,
const char **tmp);
+extern int device_is_dependent(struct device *dev, void *target);

static inline bool device_supports_offline(struct device *dev)
{
--
2.27.0.278.ge193c7cf3a9-goog