linux-kernel - [PATCH 3.12 47/82] mei: clear write cb from waiting list on reset

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Message-Id: <20140220235020.892584649@linuxfoundation.org>
Date:	Thu, 20 Feb 2014 15:52:30 -0800
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org,
	Alexander Usyskin <alexander.usyskin@...el.com>,
	Tomas Winkler <tomas.winkler@...el.com>
Subject: [PATCH 3.12 47/82] mei: clear write cb from waiting list on reset

3.12-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Alexander Usyskin <alexander.usyskin@...el.com>

commit 30c54df7cb9b15b222529a028390b9c9582dd65e upstream.

Clear write callbacks sitting in write_waiting list on reset.
Otherwise these callbacks are left dangling and cause memory leak.

Signed-off-by: Alexander Usyskin <alexander.usyskin@...el.com>
Signed-off-by: Tomas Winkler <tomas.winkler@...el.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/misc/mei/client.c |   10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

--- a/drivers/misc/mei/client.c
+++ b/drivers/misc/mei/client.c
@@ -916,8 +916,16 @@ void mei_cl_all_wakeup(struct mei_device
 void mei_cl_all_write_clear(struct mei_device *dev)
 {
 	struct mei_cl_cb *cb, *next;
+	struct list_head *list;
 
-	list_for_each_entry_safe(cb, next, &dev->write_list.list, list) {
+	list = &dev->write_list.list;
+	list_for_each_entry_safe(cb, next, list, list) {
+		list_del(&cb->list);
+		mei_io_cb_free(cb);
+	}
+
+	list = &dev->write_waiting_list.list;
+	list_for_each_entry_safe(cb, next, list, list) {
 		list_del(&cb->list);
 		mei_io_cb_free(cb);
 	}


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