Messages in this thread | | | Date | Mon, 16 Nov 2009 16:31:20 -0500 (EST) | From | Alan Stern <> | Subject | Re: [RFC][PATCH 1/10] PM: Add flag for devices capable of generating run-time wake-up events |
| |
On Mon, 16 Nov 2009, Matthew Garrett wrote:
> On Mon, Nov 16, 2009 at 04:00:49PM -0500, Alan Stern wrote: > > On Mon, 16 Nov 2009, Rafael J. Wysocki wrote: > > > Yes, in general. The platform. > > > > And for non-platform devices (hot-pluggable, for example)? Presumably > > you would want the driver that detects and registers the device to set > > this flag. > > Are there any cases where the bus code won't know this?
None that I'm aware of. I merely wanted to clarify where the flag was supposed to get set.
> > > > What if the kernel can't tell whether or not the device can generate > > > > runtime wake-up events? > > > > > > Do you have any specific examples in mind? > > > > What about Matthew's example of an ACPI GPE which might or might not > > cause a runtime wake-up event, depending on the AML code in the BIOS? > > The platform knows whether or not that's the case.
Okay, then it isn't a problem. Except perhaps in the case of buggy devices which _should_ generate these events but don't.
Alan Stern
| |