From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S966913AbcLWBXl (ORCPT ); Thu, 22 Dec 2016 20:23:41 -0500 Received: from mga03.intel.com ([134.134.136.65]:55011 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S966874AbcLWBXi (ORCPT ); Thu, 22 Dec 2016 20:23:38 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.33,391,1477983600"; d="scan'208";a="915386554" From: Even Xu To: jikos@kernel.org, benjamin.tissoires@redhat.com, srinivas.pandruvada@linux.intel.com, arnd@arndb.de, gregkh@linuxfoundation.org, andriy.shevchenko@intel.com Cc: linux-input@vger.kernel.org, linux-kernel@vger.kernel.org, Even Xu Subject: [PATCH 5/7] hid: intel-ish-hid: ishtp: add helper function for client search Date: Fri, 23 Dec 2016 09:22:27 +0800 Message-Id: <1482456149-4841-5-git-send-email-even.xu@intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1482456149-4841-1-git-send-email-even.xu@intel.com> References: <1482456149-4841-1-git-send-email-even.xu@intel.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add helper function ishtp_fw_cl_get_client() for client driver searching client information to hide internal details from callers. Signed-off-by: Even Xu Reviewed-by: Andriy Shevchenko Acked-by: Srinivas Pandruvada --- drivers/hid/intel-ish-hid/ishtp/bus.c | 25 +++++++++++++++++++++++++ drivers/hid/intel-ish-hid/ishtp/bus.h | 2 ++ 2 files changed, 27 insertions(+) diff --git a/drivers/hid/intel-ish-hid/ishtp/bus.c b/drivers/hid/intel-ish-hid/ishtp/bus.c index 40e13f1..f07af7a 100644 --- a/drivers/hid/intel-ish-hid/ishtp/bus.c +++ b/drivers/hid/intel-ish-hid/ishtp/bus.c @@ -149,6 +149,31 @@ int ishtp_fw_cl_by_uuid(struct ishtp_device *dev, const uuid_le *uuid) EXPORT_SYMBOL(ishtp_fw_cl_by_uuid); /** + * ishtp_fw_cl_get_client() - return client information to client + * @dev: the ishtp device structure + * @uuid: uuid of the client to search + * + * Search firmware client using UUID and reture related client information. + * + * Return: pointer of client information on success, NULL on failure. + */ +struct ishtp_fw_client *ishtp_fw_cl_get_client(struct ishtp_device *dev, + const uuid_le *uuid) +{ + int i; + unsigned long flags; + + spin_lock_irqsave(&dev->fw_clients_lock, flags); + i = ishtp_fw_cl_by_uuid(dev, uuid); + spin_unlock_irqrestore(&dev->fw_clients_lock, flags); + if (i < 0 || dev->fw_clients[i].props.fixed_address) + return NULL; + + return &dev->fw_clients[i]; +} +EXPORT_SYMBOL(ishtp_fw_cl_get_client); + +/** * ishtp_fw_cl_by_id() - return index to fw_clients for client_id * @dev: the ishtp device structure * @client_id: fw client id to search diff --git a/drivers/hid/intel-ish-hid/ishtp/bus.h b/drivers/hid/intel-ish-hid/ishtp/bus.h index 8888331..b8a5bcc 100644 --- a/drivers/hid/intel-ish-hid/ishtp/bus.h +++ b/drivers/hid/intel-ish-hid/ishtp/bus.h @@ -113,5 +113,7 @@ void ishtp_cl_driver_unregister(struct ishtp_cl_driver *driver); int ishtp_register_event_cb(struct ishtp_cl_device *device, void (*read_cb)(struct ishtp_cl_device *)); int ishtp_fw_cl_by_uuid(struct ishtp_device *dev, const uuid_le *cuuid); +struct ishtp_fw_client *ishtp_fw_cl_get_client(struct ishtp_device *dev, + const uuid_le *uuid); #endif /* _LINUX_ISHTP_CL_BUS_H */ -- 2.7.4