From nobody Fri Dec 19 01:00:02 2025 Received: from mail-lj1-f172.google.com (mail-lj1-f172.google.com [209.85.208.172]) (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 CBC7F1F9EAE for ; Fri, 6 Dec 2024 09:43:21 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.208.172 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733478204; cv=none; b=a/DUuPKvr+CJ7LB1DVnx/+dS1RX428q9XAgOKNtKqdi2NMMRAU+OKo/lNTV5ysMiahnlt9IOf303co/OntL2vTDb3xJVnGaYhYpzxLwvbxB2iBCKwLlvmJkgdUmsDMJrzLiO+mvIjlO2/RHRY0n5lOC8YoFkW1CgU40NGOKr1Ys= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733478204; c=relaxed/simple; bh=S2LNy/QG/Pvu7jaLQRzV8x9aVeJiuTJJixaJAknwzOI=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=dr6XXjJbhh8nhX17jm1nVhgZepe4thviJCRn7hWSJhCMX3qz5pPwuyQIxCaZgeyD5kBq782lwJSNld8ZVLtnk5/vBo6W6WkiJgOAZn9tQfhnzK0JTkhBsNtd3P03BfuUhP3CS/vHqx7dHdhjDp9tB2raDb1H79ILVdrR41h7828= 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=BicLqy1G; arc=none smtp.client-ip=209.85.208.172 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="BicLqy1G" Received: by mail-lj1-f172.google.com with SMTP id 38308e7fff4ca-2f7657f9f62so17819951fa.3 for ; Fri, 06 Dec 2024 01:43:21 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1733478200; x=1734083000; 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=Wh7X6NiXjO0ZK0icbu5RRSIlyMlU/s3VBkgppSRGnTc=; b=BicLqy1GHsDtul6M54FTDxmspEV8KLfCzEGux/KaZ8lSkyzZ8qT8NGwwk8JQEIiRd2 LGKTaLL8d+mBCb6w3o8ylAvr41d5S/9cNPzrwcOdf7BNBYXgwGRfQNTJfh/1OlfxHsH3 qmbu5vuRobTkYq61rod7hkDh9zrHspfJPWqpE2QqGiFekonmD4fD9rqceGGfnfRxb2pL Q/CZQkfG7EmsRVfWotClBndg3BnE5H5OOgNL8J0LexKdfthFpUq4/jxM/Sc+YDk54bjZ RsLldkeWtG21eBatalhGjBJ9XtrIdo6Rn+3sZepjq26sP4Qv3u66Xn64fido74OdJf/f 4xLQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1733478200; x=1734083000; 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=Wh7X6NiXjO0ZK0icbu5RRSIlyMlU/s3VBkgppSRGnTc=; b=eN+HFx2ZRkt0o8Babuo3EUp4IkpZBLuWCqiNp2h14TlRycgYe0fRa8Y/sA0xxs2zcR 7pasm4aW5tAnW7tUoxaAsCZdD+gHQqyjBg+shogj8lYysyRflQxKdtdrEoDS6oIoaMxz u2BA0j1BR/x6b2FDp9tUFWNi/ChflWhNoq9QStcy9VJ+x9oyeDrOMoxvXRm7hCZPfOzg uKlg5Oaax8kp9TKFvNeUf0tjr5BjprqTlw6LoopWDWUof45QGhBvnFEMtee8giactTsT fRNuXTNJk4cu4DkFWFAopOJBpFbT+h9zlWTIttzyf9fr1QDuutF/Or4iZJ//+JTk8dGT BCpg== X-Forwarded-Encrypted: i=1; AJvYcCWtdWRrgWUrR9TOtZZNRnleU7k9Zgri/NYoi3NcWbFydWzLW4zDF3PXuNieEg0VUgH+TG8I/VrHFf/JUkM=@vger.kernel.org X-Gm-Message-State: AOJu0YzKdtVhdqPNdX6Ko8gSGA4BHc+UJmTGAZWa+qUAaut5hhEPAL8R qfLKiis8e95m7zvo6H1i/BfLWlZAuceei6F/pPF+/9K4iYp/b5QAhPN8ULxC0Wc= X-Gm-Gg: ASbGncvRPW83rHYkvI+JZBCcxPPd8RS4L4mx+Mswk389FSBxSVUC5xHKzW8ZjFDPXKK u/ow6hFbA2MtU3ztyJVisUNXG8xgVK66ol3SxUpp4/CAxHHNkHsKMgrZOL3qvR2h/jvh++Iskfr m7+ubKMl+ymCA8FE3lsNy8/c0AeG7+e852/b/lvJiYJt1wuza8mpc3C9m+LUxP7bRcfnwaqLyNG HPJYUEtZsU1FK65tj7OXPcBgBeTP33EVekzOeQMOgNG32+BKx3zOgCijA== X-Google-Smtp-Source: AGHT+IFBxT03pxchsuAow8zXPe44X5vXMeN6+pzw5XgO7yRZwFTl4DSSqXqmQN/nIOwdAf9XNhMk0g== X-Received: by 2002:a2e:a90f:0:b0:2fa:cc86:f217 with SMTP id 38308e7fff4ca-3002fcc6314mr10909661fa.35.1733478199996; Fri, 06 Dec 2024 01:43:19 -0800 (PST) Received: from umbar.lan ([192.130.178.90]) by smtp.gmail.com with ESMTPSA id 38308e7fff4ca-30020db3805sm4128441fa.50.2024.12.06.01.43.17 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 06 Dec 2024 01:43:18 -0800 (PST) From: Dmitry Baryshkov Date: Fri, 06 Dec 2024 11:43:06 +0200 Subject: [PATCH v2 03/10] drm/bridge: ite-it66121: use eld_mutex to protect access to connector->eld Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20241206-drm-connector-eld-mutex-v2-3-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_Canal?= , 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=1093; i=dmitry.baryshkov@linaro.org; h=from:subject:message-id; bh=S2LNy/QG/Pvu7jaLQRzV8x9aVeJiuTJJixaJAknwzOI=; b=owGbwMvMwMXYbdNlx6SpcZXxtFoSQ3rQcT0D+fWrdf7eTuO7miErYRRq/uGdQ1bilxVd2j16Z z/vrJ/SyWjMwsDIxSArpsjiU9AyNWZTctiHHVPrYQaxMoFMYeDiFICJpAtzMKxmXrAmIf3sx79J n5x5p8lbc0yOj9hTUFTN17jvemrJ5y/aGWJsN90qs3j2HCpJO3d947HLoiufHO66EK487WcPu11 nm12ex98Nfkt75Zb+CJdfGT4lNHqmtrDVbxVb710nCjUmbrr9djMbP9vtiRfb/tVodHA/9zbjTp F0UW+v3VO2sZRl3zl7tlRnDkUX0/ud0U8Cn1rduKSQ9zDX7POhM+sniP9cXR1c0TOtPPZAG7NQc 23p9xmHks64efKmbr0dkTlrP/cz+ZmZz6Y5SZ2ZxRdyk8vljuq/sP1L23tFZb+4PNSt8KvLEfbi rq6MWdlq8X/xgh4O6wU1LBPiahwNfFNvHJtbsfeP697ZAA== 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 Signed-off-by: Dmitry Baryshkov --- drivers/gpu/drm/bridge/ite-it66121.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/gpu/drm/bridge/ite-it66121.c b/drivers/gpu/drm/bridge/= ite-it66121.c index 35ae3f0e8f51f768229e055a086b53a419ffcd9f..940083e5d2ddbfc56f14e2bdc6d= dd0b9dd50b1f8 100644 --- a/drivers/gpu/drm/bridge/ite-it66121.c +++ b/drivers/gpu/drm/bridge/ite-it66121.c @@ -1450,8 +1450,10 @@ static int it66121_audio_get_eld(struct device *dev,= void *data, dev_dbg(dev, "No connector present, passing empty EDID data"); memset(buf, 0, len); } else { + mutex_lock(&ctx->connector->eld_mutex); memcpy(buf, ctx->connector->eld, min(sizeof(ctx->connector->eld), len)); + mutex_unlock(&ctx->connector->eld_mutex); } mutex_unlock(&ctx->lock); =20 --=20 2.39.5