[PATCH 3.16 027/125] mei: fix return value on disconnect timeout

Greg Kroah-Hartman
2014-09-03T22:18:15Z

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

commit fe2f17eb3da38ac0d5a00c511255bf3a33d16d24 upstream.

wait_event_timeout can return 0 or the remaining jiffies
so return -ETIME if disconnected state not reached.

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

---
drivers/misc/mei/client.c | 15 +++++----------
1 file changed, 5 insertions(+), 10 deletions(-)

--- a/drivers/misc/mei/client.c
+++ b/drivers/misc/mei/client.c
@@ -459,7 +459,7 @@ int mei_cl_disconnect(struct mei_cl *cl)
{
struct mei_device *dev;
struct mei_cl_cb *cb;
- int rets, err;
+ int rets;

if (WARN_ON(!cl || !cl->dev))
return -ENODEV;
@@ -501,23 +501,18 @@ int mei_cl_disconnect(struct mei_cl *cl)
}
mutex_unlock(&dev->device_lock);

- err = wait_event_timeout(dev->wait_recvd_msg,
+ wait_event_timeout(dev->wait_recvd_msg,
MEI_FILE_DISCONNECTED == cl->state,
mei_secs_to_jiffies(MEI_CL_CONNECT_TIMEOUT));

mutex_lock(&dev->device_lock);
+
if (MEI_FILE_DISCONNECTED == cl->state) {
rets = 0;
cl_dbg(dev, cl, "successfully disconnected from FW client.\n");
} else {
- rets = -ENODEV;
- if (MEI_FILE_DISCONNECTED != cl->state)
- cl_err(dev, cl, "wrong status client disconnect.\n");
-
- if (err)
- cl_dbg(dev, cl, "wait failed disconnect err=%d\n", err);
-
- cl_err(dev, cl, "failed to disconnect from FW client.\n");
+ cl_dbg(dev, cl, "timeout on disconnect from FW client.\n");
+ rets = -ETIME;
}

mei_io_list_flush(&dev->ctrl_rd_list, cl);