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authorShen Guang <shenguang10@gmail.com>2014-01-08 14:45:42 +0800
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2014-10-05 14:54:10 -0700
commit47415d5452b8945bfbe7e2adb3fa15658b3c3d21 (patch)
tree08a351ea487bc176bdb5f2d900259ebc047f51db /fs/nfs
parente5330465e2dd7cf08d6129389324b32c09e16028 (diff)
downloadlinux-linaro-stable-47415d5452b8945bfbe7e2adb3fa15658b3c3d21.tar.gz
usb:hub set hub->change_bits when over-current happens
commit 08d1dec6f4054e3613f32051d9b149d4203ce0d2 upstream. 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> Cc: Frans Klaver <fransklaver@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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