From patchwork Tue Sep 24 16:44:08 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Benoit Parrot X-Patchwork-Id: 11159249 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 0ECC413B1 for ; Tue, 24 Sep 2019 16:42:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E25DA217D7 for ; Tue, 24 Sep 2019 16:42:22 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=ti.com header.i=@ti.com header.b="ya6PGwhL" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2404296AbfIXQmV (ORCPT ); Tue, 24 Sep 2019 12:42:21 -0400 Received: from fllv0016.ext.ti.com ([198.47.19.142]:46972 "EHLO fllv0016.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2403972AbfIXQmU (ORCPT ); Tue, 24 Sep 2019 12:42:20 -0400 Received: from lelv0266.itg.ti.com ([10.180.67.225]) by fllv0016.ext.ti.com (8.15.2/8.15.2) with ESMTP id x8OGgHVf064244; Tue, 24 Sep 2019 11:42:17 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1569343337; bh=CrlXIhfT8xsTDmUmEr9Vo9usJitecelkTp/ShJS5Jrc=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=ya6PGwhL0OIY9ijNTBjXKklkJzo8ly5GYJyuSbdi20o+btsEUWWeYgaMwuuxdHONL W9f8mErcpbOY8nykgzs5D3em1+5fBK5GU98ds+nDEal76ltOJNBwzaJ72Kel5Kzm73 qJ248985Pb0KXZfxsNNckHyIKwxZmbpdbA0TQVo0= Received: from DFLE109.ent.ti.com (dfle109.ent.ti.com [10.64.6.30]) by lelv0266.itg.ti.com (8.15.2/8.15.2) with ESMTPS id x8OGgH50048832 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Tue, 24 Sep 2019 11:42:17 -0500 Received: from DFLE107.ent.ti.com (10.64.6.28) by DFLE109.ent.ti.com (10.64.6.30) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1713.5; Tue, 24 Sep 2019 11:42:10 -0500 Received: from fllv0039.itg.ti.com (10.64.41.19) by DFLE107.ent.ti.com (10.64.6.28) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1713.5 via Frontend Transport; Tue, 24 Sep 2019 11:42:10 -0500 Received: from uda0869644b.dal.design.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by fllv0039.itg.ti.com (8.15.2/8.15.2) with ESMTP id x8OGgCQU073229; Tue, 24 Sep 2019 11:42:16 -0500 From: Benoit Parrot To: Hans Verkuil , Sakari Ailus CC: Prabhakar Lad , Rob Herring , , , , Benoit Parrot , Jyri Sarha Subject: [Patch v3 2/8] media: i2c: ov2659: Fix sensor detection to actually fail when device is not present Date: Tue, 24 Sep 2019 11:44:08 -0500 Message-ID: <20190924164414.21897-3-bparrot@ti.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190924164414.21897-1-bparrot@ti.com> References: <20190924164414.21897-1-bparrot@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org Make sure that if the expected sensor device id register is not recognized properly the failure is propagated up so devices are not left partially initialized. Signed-off-by: Benoit Parrot Signed-off-by: Jyri Sarha --- drivers/media/i2c/ov2659.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/media/i2c/ov2659.c b/drivers/media/i2c/ov2659.c index 17573257097d..efbe6dc720e2 100644 --- a/drivers/media/i2c/ov2659.c +++ b/drivers/media/i2c/ov2659.c @@ -1330,11 +1330,12 @@ static int ov2659_detect(struct v4l2_subdev *sd) unsigned short id; id = OV265X_ID(pid, ver); - if (id != OV2659_ID) + if (id != OV2659_ID) { dev_err(&client->dev, "Sensor detection failed (%04X, %d)\n", id, ret); - else { + ret = -ENODEV; + } else { dev_info(&client->dev, "Found OV%04X sensor\n", id); ret = ov2659_init(sd, 0); }