From: Alexander Usyskin <[email protected]> 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 <[email protected]> Signed-off-by: Tomas Winkler <[email protected]> --- drivers/misc/mei/client.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/misc/mei/client.c b/drivers/misc/mei/client.c index ecfaef93457d..923fad39535c 100644 --- a/drivers/misc/mei/client.c +++ b/drivers/misc/mei/client.c @@ -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; -- 2.7.4
