From patchwork Sat Nov 30 23:55:19 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Baryshkov X-Patchwork-Id: 13889323 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 gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 4A1E1D7361F for ; Sat, 30 Nov 2024 23:55:41 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 05E8D10E3DC; Sat, 30 Nov 2024 23:55:38 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=linaro.org header.i=@linaro.org header.b="SNdFuSMb"; dkim-atps=neutral Received: from mail-lf1-f43.google.com (mail-lf1-f43.google.com [209.85.167.43]) by gabe.freedesktop.org (Postfix) with ESMTPS id 2AA4010E3D1 for ; Sat, 30 Nov 2024 23:55:36 +0000 (UTC) Received: by mail-lf1-f43.google.com with SMTP id 2adb3069b0e04-53dd57589c8so4272090e87.1 for ; Sat, 30 Nov 2024 15:55:36 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1733010934; x=1733615734; darn=lists.freedesktop.org; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:from:to:cc:subject:date:message-id :reply-to; bh=FgyD7a8KnGJ66sjxEdDPFFI8o7yH9d7qAC7Fc+pHT8w=; b=SNdFuSMb3xDJqPClCoEveSndFNmUkqQTl8VEtrJJPXVY2nD19b1Vtz6B2bKCbp+9f0 JG6A8aO6l265rbnef6E0v/YEkyg+hrg7urhA/twcl1QEEpDmSq0z/ljdSdQ8khSYXAg2 ffIRvN0tC58BxInJSOmf1LB5NSnTLCFR0ZApRf2Ln5lXyUxTe+tj6K5XDyDzWpOUHuvo ewsVxVhex7J1CsWJZs4+OJ1qeD/5r3Wg384YHwofLLLF0hJl8kg+rGqTS66DjCvK0Wpg 1PfOC9gAiZX39OZnQPKgRauGtNQCQ4Vv4Lb44pAB9JiroVAjcdhxxjSvyppbwkgMLAKp A9Pg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1733010934; x=1733615734; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=FgyD7a8KnGJ66sjxEdDPFFI8o7yH9d7qAC7Fc+pHT8w=; b=kqwwfYAmQs/PzalVcDXZWyCnWyEIY4KbcxM5ag80QNiTxd/114l4VgYje108MamVNw 9qXcyru+cZNAbtpyXmOR44EsPlILmztzfftr+7rC90xoN7kdOEaiKS5qlay2Kn7PTUc8 /1hZQ4GGiG+11ZHCW2Im7fnqEEEgDk9S9ADZOhe8iJcqW5i9GgvEHi10SQz3f7tDU9sx bNNQZhzx7hajmXpWPnAKYgi6Hy6ILRbsBVq9XPcN+5g+F87eB2qKcZXi9spUuWx4hmY4 e9FqrPM61VHSimT3x24ZyyNdDBGw0zUuacnz9I+pE8OwmyLM0pfuUTiBuOq835DdFxwv kHsQ== X-Gm-Message-State: AOJu0YxvoE8SASV6q4goXuvTAYyUpvc2nH6v/J3nYYE79csbJcb+P2zU l8wQooJpzObZgYmien5qA0MIdRvRsnbH6VXjvVXvL0H4nmwCRnpbemk8GFOLzT8= X-Gm-Gg: ASbGncseIoTaQLJsd4y6LdftdPnt2gVFLfwP7YZhon8V8yVEg0awXEN4vQ59qoen1sA ZZA8z6OfbFmV4wQe7/1ILVutMP14ATx/Cf/XBv4Mdi9ve48jqoLs8r/FbROQTbBWVx4cI0RwkvH EP5ag/WKoxqpdXva4OmUrYXpk0mEZXxLqpNcLO483ou+mcPY1BLMTt6q01fiK/wZDY+ui302XMm 4AZ6A7eeqf0YOiapISOUrX0LbzM3Dwg4sAqc/DhgWNCX0xg6+c4nCI7bQ== X-Google-Smtp-Source: AGHT+IFfhVER9h/x9rK2y02O8ScgxqBwF/5PNitw9Xk11JpSQfAwSB2naROC3kIrCP+2Ei8nyJ5Kkg== X-Received: by 2002:a05:6512:3f7:b0:53d:f583:81df with SMTP id 2adb3069b0e04-53df5838209mr3265430e87.28.1733010934296; Sat, 30 Nov 2024 15:55:34 -0800 (PST) Received: from umbar.lan ([192.130.178.90]) by smtp.gmail.com with ESMTPSA id 2adb3069b0e04-53df649647dsm900706e87.195.2024.11.30.15.55.31 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 30 Nov 2024 15:55:33 -0800 (PST) From: Dmitry Baryshkov Date: Sun, 01 Dec 2024 01:55:19 +0200 Subject: [PATCH 02/10] drm/bridge: anx7625: use eld_mutex to protect access to connector->eld MIME-Version: 1.0 Message-Id: <20241201-drm-connector-eld-mutex-v1-2-ba56a6545c03@linaro.org> References: <20241201-drm-connector-eld-mutex-v1-0-ba56a6545c03@linaro.org> In-Reply-To: <20241201-drm-connector-eld-mutex-v1-0-ba56a6545c03@linaro.org> To: Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Harry Wentland , Leo Li , Rodrigo Siqueira , Alex Deucher , =?utf-8?q?Christian_K=C3=B6nig?= , Xinhui Pan , Andrzej Hajda , Neil Armstrong , Robert Foss , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , Phong LE , Inki Dae , Seung-Woo Kim , Kyungmin Park , Krzysztof Kozlowski , Alim Akhtar , Jani Nikula , Rodrigo Vivi , Joonas Lahtinen , Tvrtko Ursulin , Rob Clark , Abhinav Kumar , Sean Paul , Marijn Suijten , Alain Volmat , Raphael Gallais-Pou , Dave Stevenson , =?utf-8?q?Ma=C3=ADra_Cana?= =?utf-8?q?l?= , Raspberry Pi Kernel Maintenance Cc: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, amd-gfx@lists.freedesktop.org, linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, intel-gfx@lists.freedesktop.org, intel-xe@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, freedreno@lists.freedesktop.org X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=1024; i=dmitry.baryshkov@linaro.org; h=from:subject:message-id; bh=jvlD3JuIycYlsUfGVML+3UeoaevWmHaaQytOdr+mxNU=; b=owEBbQGS/pANAwAKAYs8ij4CKSjVAcsmYgBnS6Xt/7pykgJj245vtdzYWdYBTAMnwoeiEVz0V cHOwIg5ZZOJATMEAAEKAB0WIQRMcISVXLJjVvC4lX+LPIo+Aiko1QUCZ0ul7QAKCRCLPIo+Aiko 1Uh9CACs2EKgY3agKG4T+t0CkgNiBGM+05Aomb7V037y3ZsVMyGBgsnshcMdjjksyQHwWAR9UO4 phcMcAP56G/wnh2roZkGyvmlMsXgcYwC/JcmmAmqRpZ3BOU41lxrAgavIrurye9kHFCYMSeIXMC ZL/VeuwljGdXtKvbiNuFpq85TOh36Cs5evtJpDjaTBBuRCU3eJzaHjovDNB31z0KSlAG44ZpfKW /bdsJLcjoLwHRdTtVG4mRghPrGrLzz35ix7Igay76WHZuOI3nL19Gs+e3V6XTkA8m2kprqqo7x9 ff5KN4kX/nqX3Z+YcrmBBsD2/q8MSlB3PQI3Q2xKw0EPGz1c X-Developer-Key: i=dmitry.baryshkov@linaro.org; a=openpgp; fpr=8F88381DD5C873E4AE487DA5199BF1243632046A X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Reading access to connector->eld can happen at the same time the drm_edid_to_eld() updates the data. Take the newly added eld_mutex in order to protect connector->eld from concurrent access. Signed-off-by: Dmitry Baryshkov --- drivers/gpu/drm/bridge/analogix/anx7625.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.c b/drivers/gpu/drm/bridge/analogix/anx7625.c index a2675b121fe44b96945f34215fd900f35bfde43a..c036bbc92ba96ec4663c55cca091cd5da9f6d271 100644 --- a/drivers/gpu/drm/bridge/analogix/anx7625.c +++ b/drivers/gpu/drm/bridge/analogix/anx7625.c @@ -2002,8 +2002,10 @@ static int anx7625_audio_get_eld(struct device *dev, void *data, memset(buf, 0, len); } else { dev_dbg(dev, "audio copy eld\n"); + mutex_lock(&ctx->connector->eld_mutex); memcpy(buf, ctx->connector->eld, min(sizeof(ctx->connector->eld), len)); + mutex_unlock(&ctx->connector->eld_mutex); } return 0;