Laurent Pinchart <laurent.pinchart+rene...@ideasonboard.com> writes: > The pm_runtime_force_suspend() and pm_runtime_force_resume() helpers are > designed to help driver being RPM-centric by offering an easy way to > manager runtime PM state during system suspend and resume. The first
s/manager/manage/ > function will force the device into runtime suspend at system suspend > time, while the second one will perform the reverse operation at system > resume time. > > However, the pm_runtime_force_resume() really forces resume, regarding s/regarding/regardless/ > of whether the device was running or already suspended before the call > to pm_runtime_force_suspend(). This results in devices being runtime > resumed at system resume time when they shouldn't. Agreed. > Fix this by recording whether the device has been forcefully suspended > in pm_runtime_force_suspend() and condition resume in > pm_runtime_force_resume() to that state. > > All current users of pm_runtime_force_resume() call the function > uncontionally in their system resume handler (some actually set it as > the resume handler), all after calling pm_runtime_force_suspend() at > system suspend time. The change in behaviour should thus be safe. > > Signed-off-by: Laurent Pinchart <laurent.pinchart+rene...@ideasonboard.com> Reviewed-by: Kevin Hilman <khil...@baylibre.com> I agree this is the right approach, but Ulf should ack this too since he's looked into all the strange corner case involved and may know of something I've missed. Kevin
