driver core: Add debug logs when fwnode links are added/deleted

This will help with debugging fw_devlink issues.

Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Saravana Kannan <saravanak@google.com>
Link: https://lore.kernel.org/r/20210915172808.620546-4-saravanak@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/base/core.c b/drivers/base/core.c
index e215220..15986cc 100644 (file)
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -95,6 +95,8 @@ int fwnode_link_add(struct fwnode_handle *con, struct fwnode_handle *sup)
 
        list_add(&link->s_hook, &sup->consumers);
        list_add(&link->c_hook, &con->suppliers);
+       pr_debug("%pfwP Linked as a fwnode consumer to %pfwP\n",
+                con, sup);
 out:
        mutex_unlock(&fwnode_link_lock);
 
@@ -109,6 +111,8 @@ out:
  */
 static void __fwnode_link_del(struct fwnode_link *link)
 {
+       pr_debug("%pfwP Dropping the fwnode link to %pfwP\n",
+                link->consumer, link->supplier);
        list_del(&link->s_hook);
        list_del(&link->c_hook);
        kfree(link);