From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ming Lei Subject: [RFC PATCH 0/3] usbnet: support runtime PM triggered by link change Date: Sun, 16 Sep 2012 01:48:16 +0800 Message-ID: <1347731299-29898-1-git-send-email-ming.lei@canonical.com> Cc: Oliver Neukum , Fink Dmitry , Rafael Wysocki , Alan Stern , netdev@vger.kernel.org, linux-usb@vger.kernel.org To: "David S. Miller" , Greg Kroah-Hartman Return-path: Received: from mail-pb0-f46.google.com ([209.85.160.46]:52585 "EHLO mail-pb0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752471Ab2IORsf (ORCPT ); Sat, 15 Sep 2012 13:48:35 -0400 Sender: netdev-owner@vger.kernel.org List-ID: Hi, Currently only very few usbnet devices support the traffic based runtime PM, eg. wake up devices if there are packets to be transmitted. For the below situation, it should make sense to runtime suspend usbnet device to save power: - after network link becomes down This patch implements the runtime PM triggered by network link change event, and it works basically on asix usbnet device after a simple runtime PM test. drivers/net/usb/asix_devices.c | 6 +- drivers/net/usb/cdc_ether.c | 5 +- drivers/net/usb/cdc_ncm.c | 9 +- drivers/net/usb/dm9601.c | 7 +- drivers/net/usb/mcs7830.c | 6 +- drivers/net/usb/sierra_net.c | 6 +- drivers/net/usb/usbnet.c | 224 +++++++++++++++++++++++++++++++++++++++- include/linux/usb/usbnet.h | 21 +++- 8 files changed, 250 insertions(+), 34 deletions(-) Thanks -- Ming Lei