On Sun, 2008-04-13 at 15:33 +0200, Rafael J. Wysocki wrote: > + * The PM core executes @prepare() for all devices before starting to > + * execute suspend callbacks for any of them, so drivers may assume all of > + * the other devices to be present and functional while @prepare() is being > + * executed. In particular, it is safe to make GFP_KERNEL memory > + * allocations from within @prepare(). However, drivers may NOT assume > + * anything about the availability of the user space at that time and it > + * is not correct to request firmware from within @prepare() (it's too > + * late to do that). [To work around this limitation, drivers may > + * register suspend and hibernation notifiers that are executed before the > + * freezing of tasks.] Can you tell me why you kept that limitation with user space ? I don't see the point... On the contrary, prepare() is the pefect place to implement handshaking with userspace for drivers that need to do so, such as the DRM. Ben. -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
