Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752550AbbL1Pj0 (ORCPT ); Mon, 28 Dec 2015 10:39:26 -0500 Received: from mga09.intel.com ([134.134.136.24]:40830 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751548AbbL1PjX (ORCPT ); Mon, 28 Dec 2015 10:39:23 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.20,491,1444719600"; d="scan'208";a="882302464" To: Ulf Hansson Cc: Adrian Hunter , chaotian.jing@mediatek.com, lars@metafoo.de, vbyravarasu@nvidia.com, sergei.shtylyov@cogentembedded.com, linux-mmc , "linux-kernel@vger.kernel.org" From: "Fu, Zhonghui" Subject: [PATCH 1/2] mmc: enable mmc host device to suspend/resume asynchronously Message-ID: <568157A7.8030607@linux.intel.com> Date: Mon, 28 Dec 2015 23:39:19 +0800 User-Agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:38.0) Gecko/20100101 Thunderbird/38.5.0 MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1507 Lines: 35 Now, PM core supports asynchronous suspend/resume mode for devices during system suspend/resume, and the power state transition of one device may be completed in separate kernel thread. PM core ensures all power state transition dependency between devices. This patch enables mmc hosts to suspend/resume asynchronously. This will take advantage of multicore and improve system suspend/resume speed. After applying this patch and enabling all mmc hosts' child devices to suspend/resume asynchronously on ASUS T100TA, the system suspend-to-idle time is reduced from 1645ms to 1107ms, and the system resume time is reduced from 940ms to 914ms. Signed-off-by: Zhonghui Fu --- drivers/mmc/core/host.c | 1 + 1 files changed, 1 insertions(+), 0 deletions(-) diff --git a/drivers/mmc/core/host.c b/drivers/mmc/core/host.c index da950c4..7222fd7 100644 --- a/drivers/mmc/core/host.c +++ b/drivers/mmc/core/host.c @@ -339,6 +339,7 @@ struct mmc_host *mmc_alloc_host(int extra, struct device *dev) host->class_dev.parent = dev; host->class_dev.class = &mmc_host_class; device_initialize(&host->class_dev); + device_enable_async_suspend(&host->class_dev); if (mmc_gpio_alloc(host)) { put_device(&host->class_dev); -- 1.7.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/