From patchwork Fri Dec 6 09:43:10 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Baryshkov X-Patchwork-Id: 13896744 Received: from mail-lj1-f181.google.com (mail-lj1-f181.google.com [209.85.208.181]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6455D1FCF7E for ; Fri, 6 Dec 2024 09:43:30 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.208.181 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733478212; cv=none; b=OngK1DtE6W8WK7xGjEcBg1w0QF1jcf1dBID1xLkNHQIWvYB99/Yi8kQGebJuLnZRPCCutFWDcZYjIoGZ5NpNUtdu94m3PVqlqE5DOLdn2MDfCeccSgen8K+D9sweJx9jNqqg76Nu9CVobuRxjrFDn8+09DrqJNU/u0MS1/srVWg= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733478212; c=relaxed/simple; bh=g8XDt4tMHXpR+O+C6P49zaXUZ1QAJx0+8PEn0RE7Eo4=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=I4lazFwuHEZD7F2Vkpx5uD0xEwKZ7Fx5IVccCt/VVh9HXzjAbMLgZ+YpXoSjeSZFVixZEt7iW+V1nuFctEG4GquJZ+ITAQJR5Ktbq33qTuS/eKbE2jEKRu1/uCvwW9NojKTGgdmQA6IUOZ8VCU16t5x3ed40xs/VqVGW9JZ9zd0= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linaro.org; spf=pass smtp.mailfrom=linaro.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b=aIQtlsmF; arc=none smtp.client-ip=209.85.208.181 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linaro.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linaro.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="aIQtlsmF" Received: by mail-lj1-f181.google.com with SMTP id 38308e7fff4ca-2f7657f9f62so17821381fa.3 for ; Fri, 06 Dec 2024 01:43:30 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1733478208; x=1734083008; darn=vger.kernel.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=MGq6aED53P5HelbsA7MK6wW8IBVofd/BuTMfX8bnHpY=; b=aIQtlsmF0EIv8fgE/9/WRbNLkzOcLHQGrH6Cv3kgecoQs5vqQfb0Cmp23Z1SufwMGL LdaHNVhYVD+edfnJU2hfnsAzt+6DVYUJzf5Uzlqyao5EUxrB9BrOaCSLzp79TEZIVyjV XMkZ3MGHI0THIS+xru43J1m++ZSRh/pmtPoia8rzKEEbJFzV1EDMGChxtBD5+rBeBcnb ITsNj8b61tUwxuIk1t3MZNjhWPuB6Lwm7elPhiEvX57ZFFVhnXCQ1E3up1c8Mm/fiZ9i pUai6jCd4HPx/jv0gE7jIVM+pCWFu6PmZ1GZzrVLJbqzxndBjzQbvDpwJbIUEZNUf4UU FJzg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1733478208; x=1734083008; 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=MGq6aED53P5HelbsA7MK6wW8IBVofd/BuTMfX8bnHpY=; b=bN9IjjAYimKkyb2igcaIaB/z369CgOSP1eNQ9pCGXfGhvxLDqlYOdTJ9wtIH/CK7Zs Jgq5W2UnWEviz3qSrgXJmh2G7b1Vk7DQIqravtobFhiNlsM+mcA4/EyGwkX31H2bpOeS 5sv5sGeiIqXmY5trH34nEeMH1uM71lJRjfgcvvpuSgtHDOslHIGi8NY1GvkSDZ++54Tp KgNFC7g/r/hVf7YOuh11RzxO3HS3ebxF/QWtcZcWuS/MzbPsrouWFjH0cKjkok9NhySv 4OW3uNp+mQmwUAeAKdnkDKOhtL4cxX4ggNwvKBvnfsOngLqki4LZVATl/Uh1z5K6n2sx R0jA== X-Forwarded-Encrypted: i=1; AJvYcCUHk/LNgXftFpd1NGsmE96f2ttWr9Z4tzVINtDjni4AmYSOjW7AutzOjUIgN9XoQ8FX6XZlc9QumisxqBVj@vger.kernel.org X-Gm-Message-State: AOJu0YxoSU73oJU6MzRdibv8r3IMlCx/dBlwNPadF/uktoFvxmUfUuOT +htoBuEj7JZjeKCR2sU6TpQCedd8Ifpyv0u8F1yNSkj/WznpIY4TzXda8qbXRH0= X-Gm-Gg: ASbGncsdr+FXZfO/Yr6+fheapGABK/xJIgSh3uqFpHQB/mOCZFPNK2/utRPKfIsVs8A gz0v8DTvUjBqO7fsakGkizAauRsKUFyzcb52Ee9HFlCi9jeiP3E4cCF4opiXhBXUMSU/Hg9r/je EKt7dpUpDmN5OboYeNVkiSUKMn5W4xNnY1Ztrn2EHAebj16rfRI2PncR9V+vAhn49rElakORMhW /ktynb6z2qOuh938iYPXd5N8Y8hAR0A6Ye25YBtfV6kKOOym/CL0tTzUg== X-Google-Smtp-Source: AGHT+IE/NYxmjluRmONb1EoU7KbKKPH87buJ0IjBEcYtxmwcZQlKK0G0iiNZoTWvmIko49pJuOa6eQ== X-Received: by 2002:a05:651c:b29:b0:2fb:5f9d:c284 with SMTP id 38308e7fff4ca-3002f8e7df4mr10594341fa.16.1733478208528; Fri, 06 Dec 2024 01:43:28 -0800 (PST) Received: from umbar.lan ([192.130.178.90]) by smtp.gmail.com with ESMTPSA id 38308e7fff4ca-30020db3805sm4128441fa.50.2024.12.06.01.43.26 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 06 Dec 2024 01:43:27 -0800 (PST) From: Dmitry Baryshkov Date: Fri, 06 Dec 2024 11:43:10 +0200 Subject: [PATCH v2 07/10] drm/msm/dp: use eld_mutex to protect access to connector->eld Precedence: bulk X-Mailing-List: linux-arm-msm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20241206-drm-connector-eld-mutex-v2-7-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=1113; i=dmitry.baryshkov@linaro.org; h=from:subject:message-id; bh=g8XDt4tMHXpR+O+C6P49zaXUZ1QAJx0+8PEn0RE7Eo4=; b=owEBbQGS/pANAwAKAYs8ij4CKSjVAcsmYgBnUscuHK4m+of5M0K58J1Ue7FnC+JgeJ7oM6NSu bFPedJdqXmJATMEAAEKAB0WIQRMcISVXLJjVvC4lX+LPIo+Aiko1QUCZ1LHLgAKCRCLPIo+Aiko 1bfrCACW5hMSxLBb5or6qGH5D5AVPGJIvY9BGjNY1WTyi2PUHO7TE/oo3Ggc7rv7l860G7eGzQ8 uVT1bon1fazOdXW+lYbtHJWim9TYibboTYhb22pQ3YrpWEiuV1UbYdHBB8vzbzO9jXkq/bJmQ1m +E4FMSQ4cvduHdnEWi/8FNjp7zOIShlJYI1KIxungwjDjpEKEtea0kLBR1PRGwCG8/yZZUFfQxI QckeAW77aJDzAZbPOuHWb2f1rJKPg5flOLCaaqtxskOhiUml7r060zILPXNfrxMo4DMSMj+jYwz 1HVsVa0f3CLU5a7ZBeGqVsa/7rnSuUMsfCkuJrb6r9MQM91w X-Developer-Key: i=dmitry.baryshkov@linaro.org; a=openpgp; fpr=8F88381DD5C873E4AE487DA5199BF1243632046A 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 Acked-by: Abhinav Kumar Reviewed-by: Abhinav Kumar Signed-off-by: Dmitry Baryshkov --- drivers/gpu/drm/msm/dp/dp_audio.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/gpu/drm/msm/dp/dp_audio.c b/drivers/gpu/drm/msm/dp/dp_audio.c index 74e01a5dd4195d5e0e04250663886f1116f25711..0fd5e0abaf07828157085bd680bfd3c7d32deb61 100644 --- a/drivers/gpu/drm/msm/dp/dp_audio.c +++ b/drivers/gpu/drm/msm/dp/dp_audio.c @@ -414,8 +414,10 @@ static int msm_dp_audio_get_eld(struct device *dev, return -ENODEV; } + mutex_lock(&msm_dp_display->connector->eld_mutex); memcpy(buf, msm_dp_display->connector->eld, min(sizeof(msm_dp_display->connector->eld), len)); + mutex_unlock(&msm_dp_display->connector->eld_mutex); return 0; }