On Friday 16 June 2006 4:04 pm, Benjamin Herrenschmidt wrote: > On Fri, 2006-06-16 at 11:45 -0700, Linus Torvalds wrote: > That's why having a simple parameter to suspend() indicating wether you > want a full suspend or just a freeze works well in most cases: The > driver author doesn't have to think too much about it and can default to > suspend (suboptimal but works). I think it makes things easier on the > driver side of things. Right. > > My point is, this has nothing to do with _suspending_ the device. > > No, but it's about suspending the _driver_. My point is that suspending > the device and suspending the driver are 2 different things. STR > involves both, STD involves only the driver. However, because of the > dependency on parent devices, they always have to be done at the same > time. I'll call that, and raise you. It's about quiescing (and in some cases suspending) an entire _stack_ of drivers and collaborating tasks. That stack can easily cross subsystem boundaries... - Dave
