From patchwork Fri Nov 16 16:23:53 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lubomir Rintel X-Patchwork-Id: 10686527 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id E2E2913B5 for ; Fri, 16 Nov 2018 16:25:00 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id D22962CAEC for ; Fri, 16 Nov 2018 16:25:00 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id C53C12D26D; Fri, 16 Nov 2018 16:25:00 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 73BC42CAEC for ; Fri, 16 Nov 2018 16:25:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2390204AbeKQCh7 (ORCPT ); Fri, 16 Nov 2018 21:37:59 -0500 Received: from shell.v3.sk ([90.176.6.54]:57076 "EHLO shell.v3.sk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2390089AbeKQCh6 (ORCPT ); Fri, 16 Nov 2018 21:37:58 -0500 Received: from localhost (localhost [127.0.0.1]) by zimbra.v3.sk (Postfix) with ESMTP id AD08152CB7; Fri, 16 Nov 2018 17:24:52 +0100 (CET) Received: from shell.v3.sk ([127.0.0.1]) by localhost (zimbra.v3.sk [127.0.0.1]) (amavisd-new, port 10032) with ESMTP id lhvz6fNpul9U; Fri, 16 Nov 2018 17:24:36 +0100 (CET) Received: from localhost (localhost [127.0.0.1]) by zimbra.v3.sk (Postfix) with ESMTP id 3AED95287F; Fri, 16 Nov 2018 17:24:23 +0100 (CET) X-Virus-Scanned: amavisd-new at zimbra.v3.sk Received: from shell.v3.sk ([127.0.0.1]) by localhost (zimbra.v3.sk [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id DKmwPl1z8mx4; Fri, 16 Nov 2018 17:24:18 +0100 (CET) Received: from belphegor.brq.redhat.com (nat-pool-brq-t.redhat.com [213.175.37.10]) by zimbra.v3.sk (Postfix) with ESMTPSA id 7B0FE52C9A; Fri, 16 Nov 2018 17:24:16 +0100 (CET) From: Lubomir Rintel To: Mark Brown , Geert Uytterhoeven , Darren Hart , Andy Shevchenko Cc: Greg Kroah-Hartman , James Cameron , Sebastian Reichel , Rob Herring , Mark Rutland , Eric Miao , Haojian Zhuang , Daniel Mack , Robert Jarzmik , linux-spi@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, platform-driver-x86@vger.kernel.org, devel@driverdev.osuosl.org, linux-pm@vger.kernel.org, Lubomir Rintel Subject: [PATCH v2 07/17] Platform: OLPC: Avoid a warning if the EC didn't register yet Date: Fri, 16 Nov 2018 17:23:53 +0100 Message-Id: <20181116162403.49854-8-lkundrak@v3.sk> X-Mailer: git-send-email 2.19.1 In-Reply-To: <20181116162403.49854-1-lkundrak@v3.sk> References: <20181116162403.49854-1-lkundrak@v3.sk> MIME-Version: 1.0 Sender: linux-spi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Just return ENODEV, so that whoever attempted to use the EC call can defer their work. Signed-off-by: Lubomir Rintel Acked-by: Pavel Machek --- Changes since v1: - EPROBE_DEFER instead of ENODEV drivers/platform/olpc/olpc-ec.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/drivers/platform/olpc/olpc-ec.c b/drivers/platform/olpc/olpc-ec.c index 35a21c66cd0d..9ee993d5d54b 100644 --- a/drivers/platform/olpc/olpc-ec.c +++ b/drivers/platform/olpc/olpc-ec.c @@ -116,8 +116,11 @@ int olpc_ec_cmd(u8 cmd, u8 *inbuf, size_t inlen, u8 *outbuf, size_t outlen) struct olpc_ec_priv *ec = ec_priv; struct ec_cmd_desc desc; - /* Ensure a driver and ec hook have been registered */ - if (WARN_ON(!ec_driver || !ec_driver->ec_cmd)) + /* Driver not yet registered. */ + if (!ec_driver) + return -EPROBE_DEFER; + + if (WARN_ON(!ec_driver->ec_cmd)) return -ENODEV; if (!ec)