From patchwork Fri Dec 6 09:43:05 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Baryshkov X-Patchwork-Id: 13896761 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 55464E7717B for ; Fri, 6 Dec 2024 09:43:22 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 0686F10F077; Fri, 6 Dec 2024 09:43:21 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=linaro.org header.i=@linaro.org header.b="fbnPiOq5"; dkim-atps=neutral Received: from mail-lj1-f172.google.com (mail-lj1-f172.google.com [209.85.208.172]) by gabe.freedesktop.org (Postfix) with ESMTPS id 5925910F075 for ; Fri, 6 Dec 2024 09:43:19 +0000 (UTC) Received: by mail-lj1-f172.google.com with SMTP id 38308e7fff4ca-2ffdbc0c103so16744141fa.3 for ; Fri, 06 Dec 2024 01:43:19 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1733478197; x=1734082997; 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=BXd2OzHxXLbpmSJUeio7TPXwyPaZHSalM8FhliMGDmw=; b=fbnPiOq5pCcywQT9RYZCjt4qazoN+DTdo8NEbMZkADw41Y1MwS1vRkfRjTRpbkaqg/ AopCHx5yXGW5TZ1ZbxvtMTGFpTT5e4vm3+ACJ9ZUMOI9BL2hsmg1A4OK2GnQs/+Ab+tb 56elA9SeN+judg7k5PIRIdjIb6lo/54VX2O/QUG90N3dqVNmpPEr0dHenZ3sUDL8pm55 6qknxdLtp148HdDpQimXcW3tLzD92PsQWo29nW2rJM6uXTV0soAd0Zflwt1zFey8UEy0 WVfINTwY6V0shY5oZB6LFoY0wwhQ7EGJTzRnxCRhM8M/YFX25Kq86NSj6AX3CHhWnVaP oDaw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1733478197; x=1734082997; 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=BXd2OzHxXLbpmSJUeio7TPXwyPaZHSalM8FhliMGDmw=; b=EhT8eo1Ntg+6gEcip8+Y+dZ6dImooCTYbLsX3G0WuQNINS3z8g0dxltmFHQZj1cwbd kieBlbAe5ayMUteoTbLSsZ5IACrSOgdxH6NOZCApVaUVK5ueg2xMY7MM8Bs8plk+jmCG MxfE/y4oSwVzTpgX2VP5GtByDtMZHPBW2vCRDnN0eOaBIcUVpMW9vhTFpbllIF7eD4kW ZxtQ3w8cCTsA9iy/I4N5MvDlFc3DH33dml6h7t6r1qzmS4L+ccoCDZHRMumE4rswlXV+ 6ptsfvxrxjQIgElm7DY9eLecwXIhYcjsoXrgDEeNJSOJ7ZOW2cFJnSrKRTRJJen6H4Ps UZOw== X-Forwarded-Encrypted: i=1; AJvYcCVuYbh/U9JRAFGizl9MrlzZms5xmGcRjT25gQRMwowveKlNlPWxaMAGdv33ac8wD43MYkah7aavBmM=@lists.freedesktop.org X-Gm-Message-State: AOJu0YzUYz+6WP1aRMA5v/7r16Jqlz6p1+tVruton9r82a2NZSTZLho/ XIXyTLN3qRiMNmves/K2lop0N/nwc6oU04VMnsyK53MSS/AomQjEE2mBHwzGxkg= X-Gm-Gg: ASbGncvQt/L5BK5p9SYF2I9vq3N+m+cjU6OUmKubEa+lwhWc5qb8S1bV9KpCgAj/RTS MAerG/zLcwQ8vILBerWRHzWBhJSm8KhII+W5gJFrPnao6rsyqcrN7UKbfmArCTzhc8VIs/9n1tt HA+22mxcnHAR2Od7XjATL+TlyG0KESQ5tdFksyL7SRz2xxpUyzk4i61kp/tOPXrTeI5ldsIMszk 5vrANEwiHVlisacze8FjmhePExXqaSwAV6GHHZdLMbqmaro/o+YvDnW4g== X-Google-Smtp-Source: AGHT+IHOzYvZJj8Vkykxd2x0JSD+NBvzpXfm6jlvPobPhv2vFXWDLmCYeuoQOdT69cvmzqWGVgvY9Q== X-Received: by 2002:a2e:a9ab:0:b0:2ff:d0aa:11b with SMTP id 38308e7fff4ca-3002f79b514mr6682241fa.16.1733478197396; Fri, 06 Dec 2024 01:43:17 -0800 (PST) Received: from umbar.lan ([192.130.178.90]) by smtp.gmail.com with ESMTPSA id 38308e7fff4ca-30020db3805sm4128441fa.50.2024.12.06.01.43.15 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 06 Dec 2024 01:43:16 -0800 (PST) From: Dmitry Baryshkov Date: Fri, 06 Dec 2024 11:43:05 +0200 Subject: [PATCH v2 02/10] drm/bridge: anx7625: use eld_mutex to protect access to connector->eld MIME-Version: 1.0 Message-Id: <20241206-drm-connector-eld-mutex-v2-2-c9bce1ee8bea@linaro.org> References: <20241206-drm-connector-eld-mutex-v2-0-c9bce1ee8bea@linaro.org> In-Reply-To: <20241206-drm-connector-eld-mutex-v2-0-c9bce1ee8bea@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=1073; i=dmitry.baryshkov@linaro.org; h=from:subject:message-id; bh=zYvAEMAKJI/pMjPuMCGmB4bmJnIIZvQ3OxFQhHsqYJE=; b=owEBbQGS/pANAwAKAYs8ij4CKSjVAcsmYgBnUscuOWsnWIy+09WL6ZmIga61MhuoPN14wFRyc CTUUhM7PIGJATMEAAEKAB0WIQRMcISVXLJjVvC4lX+LPIo+Aiko1QUCZ1LHLgAKCRCLPIo+Aiko 1QuCB/9GVQCw++i7vtbIm18C0qWy2CcrBgiveGKyYFt0iSpolRcgaG6RbcwjW5qst9mjy3Q6fyT wfoOatec5nsxe7H0nq3z0RdLACzVly4qvlxnotelWRdH/BQ6ujFXyFerWcmtX3JM/VBGIQ2IBAc cy6kBFVrFFfY0hrjJEvNHpO8Jw7wJ8KQT4IzkIw7DCzBnKyhq7QShr5O2I++bdw+2PCmYR+Ig4l AKpe8UolsbHTV1DesMVMTPNQMXDw/veYJp5B5GOVzXYZoSXeg0/Wp4HONWYO6yhjuqBKn4BL1Kz Qv9O5BOb777DITYj54ixLYloqlzSi9P0cRUdPa0UewnOGLrp X-Developer-Key: i=dmitry.baryshkov@linaro.org; a=openpgp; fpr=8F88381DD5C873E4AE487DA5199BF1243632046A X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" 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. Reviewed-by: Maxime Ripard 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;