linux-kernel - [PATCH] driver core: Make sure device detached from driver before deleting it

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Date:   Wed, 18 Oct 2017 13:49:26 +0800
From:   Jeffy Chen <jeffy.chen@...k-chips.com>
To:     linux-kernel@...r.kernel.org
Cc:     dmitry.torokhov@...il.com, heiko@...ech.de,
        briannorris@...omium.org, rjw@...ysocki.net, dianders@...omium.org,
        tfiga@...omium.org, broonie@...nel.org, seanpaul@...omium.org,
        thierry.reding@...il.com, Jeffy Chen <jeffy.chen@...k-chips.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: [PATCH] driver core: Make sure device detached from driver before deleting it

There are cases we call device_del() without detaching it from the
driver(e.g. spi core del children devices).

Signed-off-by: Jeffy Chen <jeffy.chen@...k-chips.com>
---

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

diff --git a/drivers/base/core.c b/drivers/base/core.c
index 12ebd055724c..717efc3020af 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -1951,6 +1951,8 @@ void device_del(struct device *dev)
 	struct kobject *glue_dir = NULL;
 	struct class_interface *class_intf;
 
+	device_release_driver(dev);
+
 	/* Notify clients of device removal.  This call must come
 	 * before dpm_sysfs_remove().
 	 */
-- 
2.11.0