From patchwork Tue Dec 1 16:42:27 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sakari Ailus X-Patchwork-Id: 335440 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=-16.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI, 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 6DFD3C64E7B for ; Tue, 1 Dec 2020 16:49:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1ED1B21D7A for ; Tue, 1 Dec 2020 16:49:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2390568AbgLAQtm (ORCPT ); Tue, 1 Dec 2020 11:49:42 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39666 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2390326AbgLAQtm (ORCPT ); Tue, 1 Dec 2020 11:49:42 -0500 Received: from hillosipuli.retiisi.eu (unknown [IPv6:2a01:4f9:c010:4572::e8:2]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D404EC0613D4 for ; Tue, 1 Dec 2020 08:48:01 -0800 (PST) Received: from lanttu.localdomain (lanttu-e.localdomain [192.168.1.64]) by hillosipuli.retiisi.eu (Postfix) with ESMTP id 2F825634C95; Tue, 1 Dec 2020 18:45:13 +0200 (EET) From: Sakari Ailus To: linux-media@vger.kernel.org Cc: hverkuil@xs4all.nl, mchehab@kernel.org Subject: [PATCH v2 11/30] ccs: Stop reading arrays after the first zero Date: Tue, 1 Dec 2020 18:42:27 +0200 Message-Id: <20201201164246.18003-12-sakari.ailus@linux.intel.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20201201164246.18003-1-sakari.ailus@linux.intel.com> References: <20201201164246.18003-1-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 be27b002a772..dec248fe7cc1 100644 --- a/drivers/media/i2c/ccs/ccs-core.c +++ b/drivers/media/i2c/ccs/ccs-core.c @@ -199,6 +199,9 @@ 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",