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107f04bbce
USB autosuspend suspends vhci_hcd. In this process hcd_bus_suspend gets executed which puts vhci_hcd in suspend state and calls vhci_hub_status. vhci_hub_status function checks hub state and if it is in suspend state, usb_hcd_resume_root_hub gets executed which resumes hub and if hub is idle, again autosuspend puts it in suspend state and this goes on. vhci_hub_status should resume hub only when hub port is in suspend state and hub port status has changed. Signed-off-by: navin patidar <navinp@cdac.in> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
TODO: - more discussion about the protocol - testing - review of the userspace interface - document the protocol Please send patches for this code to Greg Kroah-Hartman <greg@kroah.com>