tree 74441f57ac7c61700c08e78d66d2ae764d6b26dd
parent ac5166bcdb43889a5bd837f5076b78049e1f8bca
author Shen Guang <shenguang10@gmail.com> 1389163542 +0800
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1389222071 -0800

usb:hub set hub->change_bits when over-current happens

When we are doing compliance test with xHCI, we found that if we
enable CONFIG_USB_SUSPEND and plug in a bad device which causes
over-current condition to the root port, software will not be noticed.
The reason is that current code don't set hub->change_bits in
hub_activate() when over-current happens, and then hub_events() will
not check the port status because it thinks nothing changed.
If CONFIG_USB_SUSPEND is disabled, the interrupt pipe of the hub will
report the change and set hub->event_bits, and then hub_events() will
check what events happened.In this case over-current can be detected.

Signed-off-by: Shen Guang <shenguang10@gmail.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Acked-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>