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Patch in this message | | | From | "Levin, Alexander (Sasha Levin)" <> | Subject | [PATCH review for 4.4 22/24] mei: return error on notification request to a disconnected client | Date | Sat, 7 Oct 2017 22:37:48 +0000 |
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From: Alexander Usyskin <alexander.usyskin@intel.com>
[ Upstream commit 7c47d2ca0feca767479329da23523ed798acb854 ]
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> Signed-off-by: Sasha Levin <alexander.levin@verizon.com> --- drivers/misc/mei/client.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/drivers/misc/mei/client.c b/drivers/misc/mei/client.c index 2ff39fbc70d1..df268365e04e 100644 --- a/drivers/misc/mei/client.c +++ b/drivers/misc/mei/client.c @@ -1300,6 +1300,9 @@ int mei_cl_notify_request(struct mei_cl *cl, struct file *file, u8 request) 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); -- 2.11.0
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