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Subject[ 29/94] libata: forbid port runtime pm by default, fixing regression
3.3-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Lin Ming <ming.m.lin@intel.com>

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 <ming.m.lin@intel.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
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);



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