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 2978A35961; Thu, 13 Feb 2025 15:21:46 +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=1739460106; cv=none; b=mKPKPY7i0KR+wvMCaeWCCNnkV1o6LtZJzxgWZMwQmrPF6zY0nIadr3+vyPJ+t457C1qXbTYSduOC5sQrve5NXoIrialbTswqGwbq0k3PnrszBVmvvz702hJQbl9O2VgmaZ0ybdBmKDV0JCmpUWNkjKeTvYxn4sW+Zh+6QfxmW7g= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1739460106; c=relaxed/simple; bh=4K0s/0p4INK39I2K3YMd8sFMBL42+PPwUFlG/WKHaXY=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=mqhvWJqbAPrBKghvzltQdZ2Jv5Ebud1+1IA+68Gie6HRH0nvoYe+MzSRT8vjRvUnh8L7JS+lKqgWgtZe7JttTNdvXyItrFZmp9UUs9KXQ79/VutHXCOzMIVAL3Wowcyfg9X/K2Eqk4CZArg3rsZhNZbMhu+67Krqfg9cVYGycYE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=PjrAhdfy; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="PjrAhdfy" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8DD28C4CEE7; Thu, 13 Feb 2025 15:21:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1739460106; bh=4K0s/0p4INK39I2K3YMd8sFMBL42+PPwUFlG/WKHaXY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=PjrAhdfyAUGh7dcd9VoWRYEJ3Qhf8mEiHmyfWjpHhvXEgXLVcvWB+SKvVI6YjOUNV XgrskFUULHVtiUP8tnGtUpkNJfXoeSp9yooag3K33lRTLlJPNWdfQC0lpIVj52SXTU nH2fATCKHlIbxDzlu9qxBNMDDb5LcJt+UaeKzc7o= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Maxime Ripard , Dmitry Baryshkov , Sasha Levin Subject: [PATCH 6.6 017/273] drm/exynos: hdmi: use eld_mutex to protect access to connector->eld Date: Thu, 13 Feb 2025 15:26:29 +0100 Message-ID: <20250213142408.041545671@linuxfoundation.org> X-Mailer: git-send-email 2.48.1 In-Reply-To: <20250213142407.354217048@linuxfoundation.org> References: <20250213142407.354217048@linuxfoundation.org> User-Agent: quilt/0.68 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Dmitry Baryshkov [ Upstream commit 5e8436d334ed7f6785416447c50b42077c6503e0 ] 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-v2-5-c9bce1ee8bea@linaro.org Signed-off-by: Dmitry Baryshkov Signed-off-by: Sasha Levin --- drivers/gpu/drm/exynos/exynos_hdmi.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/gpu/drm/exynos/exynos_hdmi.c b/drivers/gpu/drm/exynos/exynos_hdmi.c index 906133331a442..c234f9245b144 100644 --- a/drivers/gpu/drm/exynos/exynos_hdmi.c +++ b/drivers/gpu/drm/exynos/exynos_hdmi.c @@ -1643,7 +1643,9 @@ static int hdmi_audio_get_eld(struct device *dev, void *data, uint8_t *buf, struct hdmi_context *hdata = dev_get_drvdata(dev); struct drm_connector *connector = &hdata->connector; + mutex_lock(&connector->eld_mutex); memcpy(buf, connector->eld, min(sizeof(connector->eld), len)); + mutex_unlock(&connector->eld_mutex); return 0; } -- 2.39.5