From patchwork Wed Nov 6 21:21:01 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wolfram Sang X-Patchwork-Id: 11231185 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 3A8831575 for ; Wed, 6 Nov 2019 21:22:42 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2145121929 for ; Wed, 6 Nov 2019 21:22:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728580AbfKFVVX (ORCPT ); Wed, 6 Nov 2019 16:21:23 -0500 Received: from sauhun.de ([88.99.104.3]:58976 "EHLO pokefinder.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727949AbfKFVVW (ORCPT ); Wed, 6 Nov 2019 16:21:22 -0500 Received: from localhost (p54B33505.dip0.t-ipconnect.de [84.179.53.5]) by pokefinder.org (Postfix) with ESMTPSA id 0C5FC2C054A; Wed, 6 Nov 2019 22:21:21 +0100 (CET) From: Wolfram Sang To: linux-media@vger.kernel.org Cc: linux-i2c@vger.kernel.org, Wolfram Sang , Wolfram Sang , linux-kernel@vger.kernel.org Subject: [PATCH 01/17] i2c: add helper to check if a client has a driver attached Date: Wed, 6 Nov 2019 22:21:01 +0100 Message-Id: <20191106212120.27983-2-wsa+renesas@sang-engineering.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20191106212120.27983-1-wsa+renesas@sang-engineering.com> References: <20191106212120.27983-1-wsa+renesas@sang-engineering.com> MIME-Version: 1.0 Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org Factoring out something used in the media subsystem. As an improvement, it bails out on both, NULL and ERRPTR. Signed-off-by: Wolfram Sang --- include/linux/i2c.h | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/include/linux/i2c.h b/include/linux/i2c.h index aaf57d9b41db..93b315c9a062 100644 --- a/include/linux/i2c.h +++ b/include/linux/i2c.h @@ -850,6 +850,11 @@ extern void i2c_del_driver(struct i2c_driver *driver); #define i2c_add_driver(driver) \ i2c_register_driver(THIS_MODULE, driver) +static inline bool i2c_client_has_driver(struct i2c_client *client) +{ + return !IS_ERR_OR_NULL(client) && client->dev.driver; +} + extern struct i2c_client *i2c_use_client(struct i2c_client *client); extern void i2c_release_client(struct i2c_client *client);