• Alan Stern's avatar
    USB: EHCI, OHCI: handover changes · 383975d7
    Alan Stern authored
    This patch (as887) changes the way ehci-hcd and ohci-hcd handle a loss
    of VBUS power during suspend.  In order for the USB-persist facility
    to work correctly, it is necessary for low- and full-speed devices
    attached to a high-speed port to be handed back to the companion
    controller during resume processing.
    
    This entails three changes: adding code to ehci-hcd to perform the
    handover, removing code from ohci-hcd to turn off ports during
    root-hub reinit, and adding code to ohci-hcd to turn on ports during
    PCI controller resume.  (Other bus glue resume methods for platforms
    supporting high-speed controllers would need a similar change, if any
    existed.)
    Signed-off-by: default avatarAlan Stern <stern@rowland.harvard.edu>
    Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
    383975d7
ohci-hcd.c 26.2 KB