From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 9B0BF1F9F74; Sun, 26 Jan 2025 14:55:39 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1737903339; cv=none; b=i9dhn+Jpyi2exRlH+7od9JjKNrSxr3aOLOWS/h2j5XC+h+kbhrZAG8o2wLWDXkB/+pG3EgVeK/1Kcbd2I8iB7fu5OTNoyamX9e8+4CZTSHYMfjMWAzwFGlfQschrhvXjBb+9TarVurrRRGlEoPUPkwS5jfYJTcCcfIS/XWAxOPo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1737903339; c=relaxed/simple; bh=AUYlC3Kq1tJ9yUzra1pfHn+21oUrYNBP5wRDuPx4TAg=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=eKDnPsw7N+b4CQcSHz6SbplqpJ+2nxY/Dt6QFa1GHARE/XTW5NkS5c6tyt7Qq4t79sRb72KHjYdIuv6LPJuhuDbuFBPcwwWO0KIjKkf35K07Gq8eAciGe5e/5ncA6NJ9E6jOwqzBn5NLAMd9a+ypy7KJWjDhVdOGKbzQ66EBZqU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=I7Q/63gR; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="I7Q/63gR" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2FDA1C4CED3; Sun, 26 Jan 2025 14:55:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1737903339; bh=AUYlC3Kq1tJ9yUzra1pfHn+21oUrYNBP5wRDuPx4TAg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=I7Q/63gR3yfy4m4DevP4EaHdNskGZbLn7frjVZINZI8r1qpHZb+W0ScTB6pKY/f3b bArpuCKDcY2p4AxDklHLdPKnnmBqJMLidh04pRjWIq/lkBqWHZ3Ol8ShmoHbqmkkX1 +8ophDlEizCsaHH72b2JbRbFIyFuqGX5obdBYcnCb2RxjfrXw2wwFmlGzDADuU5KEX /aDZPmq2VYjW6Sdit1WjX4XnocU/UktlyPOHXWRIhX2KE9hcutE/C8IKARRzCZRp12 0KR+0KPJslKkhOg1sjgLsODoCtSAPcOc1iczzOH6XNba09jQ3F8eRZTKgCDWgj/umu CJPyTsUQhiewg== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Dmitry Baryshkov , Maxime Ripard , Sasha Levin , alexander.deucher@amd.com, christian.koenig@amd.com, Xinhui.Pan@amd.com, airlied@gmail.com, simona@ffwll.ch, amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org Subject: [PATCH AUTOSEL 6.12 17/31] drm/radeon: use eld_mutex to protect access to connector->eld Date: Sun, 26 Jan 2025 09:54:33 -0500 Message-Id: <20250126145448.930220-17-sashal@kernel.org> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20250126145448.930220-1-sashal@kernel.org> References: <20250126145448.930220-1-sashal@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore X-stable-base: Linux 6.12.11 Content-Transfer-Encoding: 8bit From: Dmitry Baryshkov [ Upstream commit b54c14f82428c8a602392d4cae1958a71a578132 ] 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 Link: https://patchwork.freedesktop.org/patch/msgid/20241206-drm-connector-eld-mutex-v2-8-c9bce1ee8bea@linaro.org Signed-off-by: Dmitry Baryshkov Signed-off-by: Sasha Levin --- drivers/gpu/drm/radeon/radeon_audio.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/gpu/drm/radeon/radeon_audio.c b/drivers/gpu/drm/radeon/radeon_audio.c index 5b69cc8011b42..8d64ba18572ec 100644 --- a/drivers/gpu/drm/radeon/radeon_audio.c +++ b/drivers/gpu/drm/radeon/radeon_audio.c @@ -775,8 +775,10 @@ static int radeon_audio_component_get_eld(struct device *kdev, int port, if (!dig->pin || dig->pin->id != port) continue; *enabled = true; + mutex_lock(&connector->eld_mutex); ret = drm_eld_size(connector->eld); memcpy(buf, connector->eld, min(max_bytes, ret)); + mutex_unlock(&connector->eld_mutex); break; } -- 2.39.5