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 C068526B09D; Thu, 13 Feb 2025 14:59:06 +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=1739458746; cv=none; b=FJNyLMHK13V3SEIMPd0qZAW51jJMUrzpKIPpvcUEkFfcOFg9Ys4+x8cAbThtjaKwJaaSgxuCSj8KDK96gdRtFCy4e6jC1Q4QzOLZXqk5L4EtXUqkVvsD0/ZCa6ys6kFBYTvxSTThqLpDbr2zul1AfhJJwvolYgo4MPG+sqiWnJU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1739458746; c=relaxed/simple; bh=L5ERSfdYb87gzCb9sXF0zOohqEFtR8H6Nr3xZ6AsvFs=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=boUmaGkqnKTuWQPlWeC1EhKtPgU0/WeyDhHtI4t7SuLZBUDnFTUQY461pQzHAUNX7bd+h8bI23ozJkolUcLth9RRw/0793dt9O1RKs0AVOswbMED+PhcY/1Pp2HiZs1/knZ0mloLD9tGRPTDXTgMOmGyG2FwOPO0cM2e1rc7374= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=MPB3TxCY; 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="MPB3TxCY" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C2471C4CED1; Thu, 13 Feb 2025 14:59:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1739458746; bh=L5ERSfdYb87gzCb9sXF0zOohqEFtR8H6Nr3xZ6AsvFs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=MPB3TxCYe+CERjej/M9CLtKrejgTCfFr4e8/p2amkNsPoS0g1kIdE2Diu1ksEEgZn kfIKpJjRgGdJdFDpLaAolUtuemvdii88MFmpWsqzSHHhLIKvHoQe6o9pixTcWQ8/66 YL6O7WMVqniL2OPjeVWTU+VV/j60Qc/HeHTBWwk0= 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 6.13 034/443] drm/bridge: ite-it66121: use eld_mutex to protect access to connector->eld Date: Thu, 13 Feb 2025 15:23:19 +0100 Message-ID: <20250213142441.942018462@linuxfoundation.org> X-Mailer: git-send-email 2.48.1 In-Reply-To: <20250213142440.609878115@linuxfoundation.org> References: <20250213142440.609878115@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 6.13-stable review patch. If anyone has any objections, please let me know. ------------------ From: Dmitry Baryshkov [ Upstream commit 39ead6e02ea7d19b421e9d42299d4293fed3064e ] 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-v2-3-c9bce1ee8bea@linaro.org Signed-off-by: Dmitry Baryshkov Signed-off-by: Sasha Levin --- 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 35ae3f0e8f51f..940083e5d2ddb 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); -- 2.39.5