From patchwork Thu Jul 27 05:42:38 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Sakari Ailus X-Patchwork-Id: 13328849 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id AA3AEEB64DD for ; Thu, 27 Jul 2023 05:47:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232131AbjG0Fru (ORCPT ); Thu, 27 Jul 2023 01:47:50 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35050 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232359AbjG0Fr2 (ORCPT ); Thu, 27 Jul 2023 01:47:28 -0400 Received: from mga01.intel.com (mga01.intel.com [192.55.52.88]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 41572FC for ; Wed, 26 Jul 2023 22:46:43 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1690436803; x=1721972803; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=eTV+2YEOnm9cdTQHWiyxLJHrVzqYUKnlFEo0De6KsFc=; b=Mg33TYzFeQ6ER1KpyqUjB5U+EITOtkJ57S4hqp51z69bg0yF3B7BHV3k ZeotoCNgDQvLOPS7xla1x/iXbI3KBr5SXBjyK5L0vuOGPC+4aPXCPKVPk rf9CnBNMa5s9lieW0ik6ebMfz+1pP8nnCz1mzG8x4iSTWbBuOojeR1B3D BAbFTzkjJJNsP0cSXBAygnThotOAiT8YscHVhna80TzgajyaZXiKrPvdb jYJdBC2Pev1pkkgFNBI1CKbhCRqBPtUhZG46gJ5vq2aWCK00SXUcrRSpc uRmII5jXL3jg7tWXeUZIUrFzWK2K8aEDVP6jyaM2L1ljdKJRM8xm7doqH w==; X-IronPort-AV: E=McAfee;i="6600,9927,10783"; a="399150721" X-IronPort-AV: E=Sophos;i="6.01,234,1684825200"; d="scan'208";a="399150721" Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by fmsmga101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 26 Jul 2023 22:44:46 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10783"; a="840584096" X-IronPort-AV: E=Sophos;i="6.01,234,1684825200"; d="scan'208";a="840584096" Received: from turnipsi.fi.intel.com (HELO kekkonen.fi.intel.com) ([10.237.72.44]) by fmsmga002-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 26 Jul 2023 22:44:39 -0700 Received: from punajuuri.localdomain (punajuuri.localdomain [192.168.240.130]) by kekkonen.fi.intel.com (Postfix) with ESMTP id DA72E120C46; Thu, 27 Jul 2023 08:44:18 +0300 (EEST) Received: from sailus by punajuuri.localdomain with local (Exim 4.96) (envelope-from ) id 1qOtmE-004xrq-0M; Thu, 27 Jul 2023 08:43:06 +0300 From: Sakari Ailus To: linux-media@vger.kernel.org Cc: laurent.pinchart@ideasonboard.com, Philipp Zabel , hverkuil@xs4all.nl, Francesco Dolcini , aishwarya.kothari@toradex.com, Robert Foss , Todor Tomov , Hyun Kwon , bingbu.cao@intel.com, niklas.soderlund@ragnatech.se, Kieran Bingham , Benjamin Mugnier , Sylvain Petinot , Eugen Hristev , Nicolas Ferre , Maxime Ripard , Rui Miguel Silva , Fabio Estevam , Bryan O'Donoghue , Sylwester Nawrocki , Dafna Hirschfeld , Hugues Fruchet , Yong Deng , Paul Kocialkowski , "Lad, Prabhakar" , Benoit Parrot , Steve Longerbeam , Thierry Reding , Jonathan Hunter , Sowjanya Komatineni , Marco Felsch Subject: [PATCH v6 21/38] media: v4l: async: Drop duplicate handling when adding connections Date: Thu, 27 Jul 2023 08:42:38 +0300 Message-Id: <20230727054255.1183255-22-sakari.ailus@linux.intel.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230727054255.1183255-1-sakari.ailus@linux.intel.com> References: <20230727054255.1183255-1-sakari.ailus@linux.intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org The connections are checked for duplicates already when the notifier is registered. This is effectively a sanity check for driver (and possibly obscure firmware) bugs. Don't do this when adding the connection. Retain the int return type for now. It'll be needed very soon again. Signed-off-by: Sakari Ailus Tested-by: Philipp Zabel # imx6qp Tested-by: Niklas Söderlund # rcar + adv746x Tested-by: Aishwarya Kothari # Apalis i.MX6Q with TC358743 Tested-by: Lad Prabhakar # Renesas RZ/G2L SMARC --- drivers/media/v4l2-core/v4l2-async.c | 27 ++++++++------------------- 1 file changed, 8 insertions(+), 19 deletions(-) diff --git a/drivers/media/v4l2-core/v4l2-async.c b/drivers/media/v4l2-core/v4l2-async.c index 0a9c9fb2a42c..0cd4e18e628c 100644 --- a/drivers/media/v4l2-core/v4l2-async.c +++ b/drivers/media/v4l2-core/v4l2-async.c @@ -471,14 +471,11 @@ v4l2_async_nf_has_async_match_entry(struct v4l2_async_notifier *notifier, /* * Find out whether an async sub-device was set up already or whether it exists - * in a given notifier. The skip_self argument is used to skip testing the same - * sub-device in the notifier in case the sub-device has been already added to - * the notifier. + * in a given notifier. */ static bool v4l2_async_nf_has_async_match(struct v4l2_async_notifier *notifier, - struct v4l2_async_match_desc *match, - bool skip_self) + struct v4l2_async_match_desc *match) { struct v4l2_async_connection *asc; @@ -486,7 +483,7 @@ v4l2_async_nf_has_async_match(struct v4l2_async_notifier *notifier, /* Check that an asd is not being added more than once. */ list_for_each_entry(asc, ¬ifier->asc_list, asc_entry) { - if (skip_self && &asc->match == match) + if (&asc->match == match) continue; if (v4l2_async_match_equal(&asc->match, match)) return true; @@ -501,16 +498,14 @@ v4l2_async_nf_has_async_match(struct v4l2_async_notifier *notifier, } static int v4l2_async_nf_match_valid(struct v4l2_async_notifier *notifier, - struct v4l2_async_match_desc *match, - bool skip_self) + struct v4l2_async_match_desc *match) { struct device *dev = notifier_dev(notifier); switch (match->type) { case V4L2_ASYNC_MATCH_TYPE_I2C: case V4L2_ASYNC_MATCH_TYPE_FWNODE: - if (v4l2_async_nf_has_async_match(notifier, match, - skip_self)) { + if (v4l2_async_nf_has_async_match(notifier, match)) { dev_dbg(dev, "v4l2-async: match descriptor already listed in a notifier\n"); return -EEXIST; } @@ -541,7 +536,7 @@ static int __v4l2_async_nf_register(struct v4l2_async_notifier *notifier) mutex_lock(&list_lock); list_for_each_entry(asc, ¬ifier->asc_list, asc_entry) { - ret = v4l2_async_nf_match_valid(notifier, &asc->match, true); + ret = v4l2_async_nf_match_valid(notifier, &asc->match); if (ret) goto err_unlock; @@ -670,19 +665,13 @@ EXPORT_SYMBOL_GPL(v4l2_async_nf_cleanup); static int __v4l2_async_nf_add_connection(struct v4l2_async_notifier *notifier, struct v4l2_async_connection *asc) { - int ret; - mutex_lock(&list_lock); - ret = v4l2_async_nf_match_valid(notifier, &asc->match, false); - if (ret) - goto unlock; - list_add_tail(&asc->asc_entry, ¬ifier->asc_list); -unlock: mutex_unlock(&list_lock); - return ret; + + return 0; } struct v4l2_async_connection *