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mei: return error on notification request to a disconnected client 

Request for a notification from a disconnected client will be ignored
silently by the FW but the caller should know that the operation hasn't
succeeded.

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>
This commit is contained in:
Alexander Usyskin 2017-01-27 16:32:41 +02:00 committed by Greg Kroah-Hartman
parent 57080e8824
commit 7c47d2ca0f
1 changed files with 3 additions and 0 deletions
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3
drivers/misc/mei/client.c
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@ -1331,6 +1331,9 @@ int mei_cl_notify_request(struct mei_cl *cl,
return -EOPNOTSUPP;
}
if (!mei_cl_is_connected(cl))
return -ENODEV;
rets = pm_runtime_get(dev->dev);
if (rets < 0 && rets != -EINPROGRESS) {
pm_runtime_put_noidle(dev->dev);