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 98D4E3FB3B; Thu, 13 Feb 2025 15:21:39 +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=1739460099; cv=none; b=uPm/n6QS8PSflfKQdUdeqsqvZ5rMKRPXy1R2kluWyNjv+Vd82vXi1CyPUBassls4P20jQVPt1eUQGtFIqp7MbAydbJnVWkDArgSsE/r1ETLzIcn8WT9/PBa/kqG91GQ9vuzC3FNXZC6o9WkxALgW3lUQpo09YXnS4tzDFMJJcZs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1739460099; c=relaxed/simple; bh=O45R/26DId1UNxq7gky2q5orQc9DpBAWRdFAc4W92jk=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=YWdVfIGPyBo06oGO7wvYmT2R4fA6w4ZRFYV4zRgXHDPg9Eb7ll2PLVMG94XAq1t1CZsIheOCDRdg+0URKzjt4jwJ06c6iqgBvluTKFSfbscmeKwGUalA1KRTWz9g1PBgTyxiRryxl4CMaR1RBu05+tKarg8HSGMGA2tbUqD+zk4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=QuKW9pjC; 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="QuKW9pjC" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0656FC4CED1; Thu, 13 Feb 2025 15:21:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1739460099; bh=O45R/26DId1UNxq7gky2q5orQc9DpBAWRdFAc4W92jk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=QuKW9pjCCSWd5YiqRFNClYc+WXA/+wK5xiJr9cRSpVF0ibvbH48C3/npoWvypwogf OcPUTjeyg/tE8vkiXCgOv0o39rs5qQ5YXIjdaQT38A1sQyDYX8Qj/2KieaEOcYc1LJ KWSiT0Qi+oU93uxzKcBmSGH72OBpmzTQB9Q/QC2M= 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 6.6 015/273] drm/bridge: ite-it66121: use eld_mutex to protect access to connector->eld Date: Thu, 13 Feb 2025 15:26:27 +0100 Message-ID: <20250213142407.964280058@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 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 8f5846b76d594..2381cd1cba879 100644 --- a/drivers/gpu/drm/bridge/ite-it66121.c +++ b/drivers/gpu/drm/bridge/ite-it66121.c @@ -1452,8 +1452,10 @@ 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