From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932781AbdA0NkG (ORCPT ); Fri, 27 Jan 2017 08:40:06 -0500 Received: from mga07.intel.com ([134.134.136.100]:24047 "EHLO mga07.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932302AbdA0Njl (ORCPT ); Fri, 27 Jan 2017 08:39:41 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.33,295,1477983600"; d="scan'208";a="36308594" From: Tomas Winkler To: Greg Kroah-Hartman Cc: Alexander Usyskin , linux-kernel@vger.kernel.org, Tomas Winkler Subject: [char-misc-next 5/9] mei: abort waiting for notification on unsupported HW Date: Fri, 27 Jan 2017 16:32:42 +0200 Message-Id: <1485527566-13653-5-git-send-email-tomas.winkler@intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1485527566-13653-1-git-send-email-tomas.winkler@intel.com> References: <1485527566-13653-1-git-send-email-tomas.winkler@intel.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Alexander Usyskin 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 Signed-off-by: Tomas Winkler --- 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