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mei: abort waiting for notification on unsupported HW

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On legacy HW, pre Skylake, the notifications are not supported,
return -EOPNOTSUPP in mei_cl_notify_get and prevent
waiting indefinitely.

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 16:32:42 +02:00 committed by Greg Kroah-Hartman
parent 7c47d2ca0f
commit 6c0d6701a5
1 changed files with 5 additions and 0 deletions
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5
drivers/misc/mei/client.c
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@ -1428,6 +1428,11 @@ int mei_cl_notify_get(struct mei_cl *cl, bool block, bool *notify_ev)
dev = cl->dev;
if (!dev->hbm_f_ev_supported) {
cl_dbg(dev, cl, "notifications not supported\n");
return -EOPNOTSUPP;
}
if (!mei_cl_is_connected(cl))
return -ENODEV;