[PATCH 4.8 002/140] mei: fix return value on disconnection

[Greg Kroah-Hartman]

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

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

From: Tomas Winkler <tomas.winkler@xxxxxxxxx>

commit 2d4d5481e2d6f93b25fcfb13a9f20bbfbf54266a upstream.

Correct errno on client disconnection is -ENODEV not -EBUSY

Signed-off-by: Tomas Winkler <tomas.winkler@xxxxxxxxx>
Signed-off-by: Alexander Usyskin <alexander.usyskin@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 drivers/misc/mei/amthif.c |    2 +-
 drivers/misc/mei/bus.c    |    2 +-
 drivers/misc/mei/main.c   |    2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

--- a/drivers/misc/mei/amthif.c
+++ b/drivers/misc/mei/amthif.c
@@ -139,7 +139,7 @@ int mei_amthif_read(struct mei_device *d
 			return -ERESTARTSYS;
 
 		if (!mei_cl_is_connected(cl)) {
-			rets = -EBUSY;
+			rets = -ENODEV;
 			goto out;
 		}
 
--- a/drivers/misc/mei/bus.c
+++ b/drivers/misc/mei/bus.c
@@ -142,7 +142,7 @@ ssize_t __mei_cl_recv(struct mei_cl *cl,
 		mutex_lock(&bus->device_lock);
 
 		if (!mei_cl_is_connected(cl)) {
-			rets = -EBUSY;
+			rets = -ENODEV;
 			goto out;
 		}
 	}
--- a/drivers/misc/mei/main.c
+++ b/drivers/misc/mei/main.c
@@ -202,7 +202,7 @@ static ssize_t mei_read(struct file *fil
 
 		mutex_lock(&dev->device_lock);
 		if (!mei_cl_is_connected(cl)) {
-			rets = -EBUSY;
+			rets = -ENODEV;
 			goto out;
 		}
 	}