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 5E9CB38389; Thu, 13 Feb 2025 14:32:35 +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=1739457155; cv=none; b=FR4kWhXI0FDBmd7a2RYNPLKB73XEEcdVeVKL6on4+3pJIwULi09UYCGfX8KXbQlyIwSzBfmbcaPcW5EL2slJhUSpM1eebMNGGo6ko4HlYDphiD3P0/gMWUcCG5KAq5Ac4PkKYrcJ1mm/mio4nyZCOCcAJNgYz4IfcoZ/Gpl9c2A= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1739457155; c=relaxed/simple; bh=Z8BVZ44xD3zTzSW5N6i3FJfNsACZjYQN9yRDKKxHUmE=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=jZ5VHipzbbdyA9sDmxlPv72Z8FZgSGupQ3+KBYXd0owicqM6PUbU2o4v2c/r1xpsrOHqIv7rKe4yo1J+a4bOyhybsGjlCR3rvx5qfZzqQ3evTUdO97rWFB2+ZvHtU64E9jFOGLEFECzFmp/vZzW1WBOUiovvKUHxJCQoWFhOl+g= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=G++bfCgi; 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="G++bfCgi" Received: by smtp.kernel.org (Postfix) with ESMTPSA id AA634C4CED1; Thu, 13 Feb 2025 14:32:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1739457155; bh=Z8BVZ44xD3zTzSW5N6i3FJfNsACZjYQN9yRDKKxHUmE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=G++bfCgiQgpqeY52Q+Mtuc0sbiEmIrQ+RnlVJmgfnJ5Xeb/OQUcrgdp0hd3CETS8O rpmJZwGvRGrI/54HGCsfj1I+DcuCLdRDqmQ/o3/4myfJGrS0PYwmpA6VXLleZEBI1p 32EpAB7e53A+WjxBNy9vIJurSA6ONzA3UP/8ZnYs= 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 6.12 032/422] drm/exynos: hdmi: use eld_mutex to protect access to connector->eld Date: Thu, 13 Feb 2025 15:23:01 +0100 Message-ID: <20250213142437.795521966@linuxfoundation.org> X-Mailer: git-send-email 2.48.1 In-Reply-To: <20250213142436.408121546@linuxfoundation.org> References: <20250213142436.408121546@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 6.12-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 1e26cd4f83479..52059cfff4f0b 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