From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932199AbbFOTAx (ORCPT ); Mon, 15 Jun 2015 15:00:53 -0400 Received: from mga03.intel.com ([134.134.136.65]:44147 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755971AbbFOS6N (ORCPT ); Mon, 15 Jun 2015 14:58:13 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.13,620,1427785200"; d="scan'208";a="747125449" From: Tomas Winkler To: gregkh@linuxfoundation.org Cc: arnd@arndb.de, linux-kernel@vger.kernel.org, Tomas Winkler Subject: [char-misc-next 06/15 V2] mei: bus: report if event registration failed Date: Mon, 15 Jun 2015 21:56:46 +0300 Message-Id: <1434394615-3754-7-git-send-email-tomas.winkler@intel.com> X-Mailer: git-send-email 2.4.3 In-Reply-To: <1434394615-3754-1-git-send-email-tomas.winkler@intel.com> References: <1434394615-3754-1-git-send-email-tomas.winkler@intel.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org If event registeration has failed, the caller should know about it. Signed-off-by: Tomas Winkler --- V2: fix the commit message drivers/misc/mei/bus.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/misc/mei/bus.c b/drivers/misc/mei/bus.c index 3756f4687292..e32913289c87 100644 --- a/drivers/misc/mei/bus.c +++ b/drivers/misc/mei/bus.c @@ -255,6 +255,8 @@ void mei_cl_bus_rx_event(struct mei_cl *cl) int mei_cl_register_event_cb(struct mei_cl_device *cldev, mei_cl_event_cb_t event_cb, void *context) { + int ret; + if (cldev->event_cb) return -EALREADY; @@ -263,7 +265,9 @@ int mei_cl_register_event_cb(struct mei_cl_device *cldev, cldev->event_context = context; INIT_WORK(&cldev->event_work, mei_bus_event_work); - mei_cl_read_start(cldev->cl, 0, NULL); + ret = mei_cl_read_start(cldev->cl, 0, NULL); + if (ret && ret != -EBUSY) + return ret; return 0; } -- 2.4.3