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authorAlexander Usyskin <alexander.usyskin@intel.com>2017-01-27 15:32:42 +0100
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2017-01-31 11:07:43 +0100
commit6c0d6701a551ac344e63935535db0494110c5f4e (patch)
treed2ed26a724a3af2f49cd0ef3ee1698f33135317d /drivers/misc/mei/client.c
parentmei: return error on notification request to a disconnected client (diff)
downloadlinux-6c0d6701a551ac344e63935535db0494110c5f4e.tar.xz
linux-6c0d6701a551ac344e63935535db0494110c5f4e.zip
mei: abort waiting for notification on unsupported HW
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>
Diffstat (limited to 'drivers/misc/mei/client.c')
-rw-r--r--drivers/misc/mei/client.c5
1 files changed, 5 insertions, 0 deletions
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;