linux-kernel - [PATCH 3.11 078/121] mei: clear write cb from waiting list on reset

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Date:	Fri, 21 Feb 2014 12:48:22 +0000
From:	Luis Henriques <luis.henriques@...onical.com>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	kernel-team@...ts.ubuntu.com
Cc:	Alexander Usyskin <alexander.usyskin@...el.com>,
	Tomas Winkler <tomas.winkler@...el.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Luis Henriques <luis.henriques@...onical.com>
Subject: [PATCH 3.11 078/121] mei: clear write cb from waiting list on reset

3.11.10.5 -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>
Signed-off-by: Luis Henriques <luis.henriques@...onical.com>
---
 drivers/misc/mei/client.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/drivers/misc/mei/client.c b/drivers/misc/mei/client.c
index 21d3f5a..e019165 100644
--- a/drivers/misc/mei/client.c
+++ b/drivers/misc/mei/client.c
@@ -915,8 +915,16 @@ void mei_cl_all_read_wakeup(struct mei_device *dev)
 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);
 	}
-- 
1.9.0

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