From mboxrd@z Thu Jan 1 00:00:00 1970 From: Brian Norris Subject: [RFC 0/3] libata/ahci unbinding, power down sequence Date: Thu, 25 Oct 2012 09:55:58 -0700 Message-ID: <1351184161-31433-1-git-send-email-computersforpeace@gmail.com> Return-path: Received: from mail-pa0-f46.google.com ([209.85.220.46]:54461 "EHLO mail-pa0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933975Ab2JYQ50 (ORCPT ); Thu, 25 Oct 2012 12:57:26 -0400 Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: Jeff Garzik Cc: linux-ide@vger.kernel.org, linux-pm@lists.linux-foundation.org, Linux Kernel , Brian Norris , Kevin Cernekee , Tejun Heo Hello, I sent out a few questions/suggestions earlier, regarding some trouble I was having in supporting my SoC SATA controller under the libata / ahci_platform driver: http://article.gmane.org/gmane.linux.ide/52951/match=unbind+rmmod I think I have identified a problem in libata's handling of hardware activity at device removal/exit (relevant to my use-case of unbind or rmmod). This patch series: (1) Allows ahci_platform to unbind a device from the driver. This is useful for allowing total power-off of the device, for instance. (2) Modifies libata-core so that ata_host_stop() is not called as a devres cleanup function (after all driver-specific functions, including power-off) The first two patches are relatively harmless and correct, I believe, where the third patch is more significant and could use good review. I am sending code because I hear no response to my standalone suggestions :) Please see my previous email (URL above) and/or patch 3/3 for a more detailed description. Thanks, Brian Brian Norris (3): ahci_platform: enable hotplug unbinding ahci_platform: convert to module_platform_driver libata: don't perform HW activity in devres drivers/ata/ahci_platform.c | 16 +++------------- drivers/ata/libata-core.c | 18 +++--------------- 2 files changed, 6 insertions(+), 28 deletions(-) -- 1.7.11.3