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linux/drivers/usb/core
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Dan Williams e3d1050555 usb: fix hub-port pm_runtime_enable() vs runtime pm transitions 
Commit 9262c19d14 "usb: disable port power control if not supported in
wHubCharacteristics" gated enabling runtime pm for usb_port devices on
whether the parent hub supports power control, which causes a
regression.  The port must still be allowed to carry out runtime pm
callbacks and receive a -EAGAIN or -EBUSY result.  Otherwise the
usb_port device will transition to the pm error state and trigger the
same for the child usb_device.

Prior to the offending commit usb_hub_create_port_device() arranged for
runtime pm to be disabled is dev_pm_qos_expose_flags() failed.  Instead,
force the default state of PM_QOS_FLAG_NO_POWER_OFF flag to be set prior
to enabling runtime pm.  If that policy can not be set then fail
registration.

Report: http://marc.info/?l=linux-usb&m=140290586301336&w=2
Fixes: 9262c19d14 ("usb: disable port power control if not supported in wHubCharacteristics")
Reported-by: Bjørn Mork <bjorn@mork.no>
Reported-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-06-17 17:04:39 -07:00
..
buffer.c
config.c
devices.c
devio.c
driver.c USB: Avoid runtime suspend loops for HCDs that can't handle suspend/resume 2014-05-24 04:06:00 +09:00
endpoint.c
file.c
generic.c
hcd-pci.c usb: remove redundant D0 power state set 2014-05-27 15:18:48 -07:00
hcd.c usb: introduce port status lock 2014-05-27 16:51:50 -07:00
hub.c usb: fix hub-port pm_runtime_enable() vs runtime pm transitions 2014-06-17 17:04:39 -07:00
hub.h usb: fix hub-port pm_runtime_enable() vs runtime pm transitions 2014-06-17 17:04:39 -07:00
Kconfig usb: common: rename phy-fsm-usb.c to usb-otg-fsm.c 2014-05-27 15:29:44 -07:00
Makefile
message.c
notify.c
otg_whitelist.h
port.c usb: fix hub-port pm_runtime_enable() vs runtime pm transitions 2014-06-17 17:04:39 -07:00
quirks.c
sysfs.c
urb.c
usb-acpi.c usb: find internal hub tier mismatch via acpi 2014-05-27 16:38:52 -07:00
usb.c
usb.h usb: hub_handle_remote_wakeup() depends on CONFIG_PM_RUNTIME=y 2014-05-27 16:51:51 -07:00