• Todd Poynor's avatar
    [PATCH] Device runtime suspend/resume fixes · 98e1a74e
    Todd Poynor authored
    (1) Set device power state at runtime resume (as is done for runtime
    suspend) so that a later suspend does not think the device is still
    suspended (refusing to suspend it again).
    
    (2) Move devices from the active list to the off list only when
    suspending all devices as part of a system suspend, not for runtime
    suspend.  This matches the resume code, which only moves devices from
    off to active during system resume, such that runtime resume currently
    doesn't move the suspended device back to the active list.  (This also
    avoids reordering the device list for runtime suspends; the list is in
    order of registration and suspend/resume works best that way -- granted,
    more sweeping improvements in how device dependencies are accounted for
    in the suspend/resume order are also needed someday.)
    
    Runtime device suspend/resume is in some cases used frequently on
    battery-powered embedded devices, to save additional power and to handle
    device power state interactions with overall system power state on
    certain platforms.
    Signed-off-by: default avatarGreg Kroah-Hartman <greg@kroah.com>
    98e1a74e
runtime.c 1.62 KB