linux-kernel - [PATCH 4.19 36/48] driver core: Remove the link if there is no driver with AUTO flag

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Date:   Thu, 19 Mar 2020 14:04:18 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Yong Wu <yong.wu@...iatek.com>,
        Saravana Kannan <saravanak@...gle.com>
Subject: [PATCH 4.19 36/48] driver core: Remove the link if there is no driver with AUTO flag

From: Yong Wu <yong.wu@...iatek.com>

commit 0fe6f7874d467456da6f6a221dd92499a3ab1780 upstream.

DL_FLAG_AUTOREMOVE_CONSUMER/SUPPLIER means "Remove the link
automatically on consumer/supplier driver unbind", that means we should
remove whole the device_link when there is no this driver no matter what
the ref_count of the link is.

CC: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Signed-off-by: Yong Wu <yong.wu@...iatek.com>
Signed-off-by: Saravana Kannan <saravanak@...gle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/base/core.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -546,7 +546,7 @@ static void __device_links_no_driver(str
 			continue;
 
 		if (link->flags & DL_FLAG_AUTOREMOVE_CONSUMER)
-			kref_put(&link->kref, __device_link_del);
+			__device_link_del(&link->kref);
 		else if (link->status != DL_STATE_SUPPLIER_UNBIND)
 			WRITE_ONCE(link->status, DL_STATE_AVAILABLE);
 	}
@@ -591,7 +591,7 @@ void device_links_driver_cleanup(struct
 		 */
 		if (link->status == DL_STATE_SUPPLIER_UNBIND &&
 		    link->flags & DL_FLAG_AUTOREMOVE_SUPPLIER)
-			kref_put(&link->kref, __device_link_del);
+			__device_link_del(&link->kref);
 
 		WRITE_ONCE(link->status, DL_STATE_DORMANT);
 	}