From patchwork Wed Oct 7 08:44:49 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sakari Ailus X-Patchwork-Id: 268310 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 85202C47426 for ; Wed, 7 Oct 2020 08:47:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3D2D721974 for ; Wed, 7 Oct 2020 08:47:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728120AbgJGIrF (ORCPT ); Wed, 7 Oct 2020 04:47:05 -0400 Received: from retiisi.org.uk ([95.216.213.190]:57076 "EHLO hillosipuli.retiisi.eu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727948AbgJGIqG (ORCPT ); Wed, 7 Oct 2020 04:46:06 -0400 Received: from lanttu.localdomain (lanttu-e.localdomain [192.168.1.64]) by hillosipuli.retiisi.eu (Postfix) with ESMTP id 43AE8634CC0 for ; Wed, 7 Oct 2020 11:45:18 +0300 (EEST) From: Sakari Ailus To: linux-media@vger.kernel.org Subject: [PATCH v2 036/106] ccs: Stop reading arrays after the first zero Date: Wed, 7 Oct 2020 11:44:49 +0300 Message-Id: <20201007084557.25843-29-sakari.ailus@linux.intel.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20201007084557.25843-1-sakari.ailus@linux.intel.com> References: <20201007084505.25761-1-sakari.ailus@linux.intel.com> <20201007084557.25843-1-sakari.ailus@linux.intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org The register arrays have a certain size but not all the entries will be relevant. In practice reading can be stopped after encountering a zero value in the array. Do that to avoid extra reads. Signed-off-by: Sakari Ailus --- drivers/media/i2c/ccs/ccs-core.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/media/i2c/ccs/ccs-core.c b/drivers/media/i2c/ccs/ccs-core.c index 0cc6e7423f26..963f945ceaf0 100644 --- a/drivers/media/i2c/ccs/ccs-core.c +++ b/drivers/media/i2c/ccs/ccs-core.c @@ -193,6 +193,9 @@ static int ccs_read_all_limits(struct ccs_sensor *sensor) goto out_err; } + if (!val && j) + break; + ccs_assign_limit(ptr, width, val); dev_dbg(&client->dev, "0x%8.8x \"%s\" = %u, 0x%x\n",