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Message-Id: <20200610011934.49795-2-saravanak@google.com>
Date: Tue, 9 Jun 2020 18:19:33 -0700
From: Saravana Kannan <saravanak@...gle.com>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
"Rafael J. Wysocki" <rafael@...nel.org>,
Rob Herring <robh+dt@...nel.org>,
Frank Rowand <frowand.list@...il.com>
Cc: Saravana Kannan <saravanak@...gle.com>,
linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
John Stultz <john.stultz@...aro.org>, kernel-team@...roid.com
Subject: [PATCH v2 1/2] driver core: Add device_is_dependent() to linux/device.h
DT implementation of fw_devlink needs this function to detect cycles. So
make it available.
Signed-off-by: Saravana Kannan <saravanak@...gle.com>
---
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
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