From: Tilman Schmidt Add a paragraph to Documentation/usb/power-management.txt about the interaction between suspend and disconnect. Signed-off-by: Tilman Schmidt Cc: Greg KH Signed-off-by: Andrew Morton --- Documentation/usb/power-management.txt | 6 ++++++ 1 file changed, 6 insertions(+) diff -puN Documentation/usb/power-management.txt~usb-power-managementtxt-disconnect-clarification Documentation/usb/power-management.txt --- a/Documentation/usb/power-management.txt~usb-power-managementtxt-disconnect-clarification +++ a/Documentation/usb/power-management.txt @@ -278,6 +278,12 @@ optional. The methods' jobs are quite s (although the interfaces will be in the same altsettings as before the suspend). +If the device is disconnected or powered down while it is suspended, +the disconnect method will be called instead of the resume or +reset_resume method. This will also happen if the system is resumed +from hibernation, as the device could have been disconnected without +the system being able to detect it. + The reset_resume method is used by the USB Persist facility (see Documentation/usb/persist.txt) and it can also be used under certain circumstances when CONFIG_USB_PERSIST is not enabled. Currently, if a _