From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Message-Id: <20120527010427.857363446@linuxfoundation.org> Date: Sun, 27 May 2012 10:04:52 +0900 From: Greg KH To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: torvalds@linux-foundation.org, akpm@linux-foundation.org, alan@lxorguk.ukuu.org.uk, Lin Ming , Jeff Garzik Subject: [ 29/94] libata: forbid port runtime pm by default, fixing regression In-Reply-To: <20120527010332.GA11170@kroah.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: 3.3-stable review patch. If anyone has any objections, please let me know. ------------------ From: Lin Ming commit 0c8d32c27f5cf6e14ca14b4758d1e994eebd50fd upstream. Forbid port runtime pm by default because it has known hotplug issue. User can allow it by, for example echo auto > /sys/devices/pci0000:00/0000:00:1f.2/ata2/power/control Signed-off-by: Lin Ming Signed-off-by: Jeff Garzik Signed-off-by: Greg Kroah-Hartman --- drivers/ata/libata-transport.c | 1 + 1 file changed, 1 insertion(+) --- a/drivers/ata/libata-transport.c +++ b/drivers/ata/libata-transport.c @@ -294,6 +294,7 @@ int ata_tport_add(struct device *parent, device_enable_async_suspend(dev); pm_runtime_set_active(dev); pm_runtime_enable(dev); + pm_runtime_forbid(dev); transport_add_device(dev); transport_configure_device(dev);