Hi! > Signed-off-by: Rafael J. Wysocki <rjw@xxxxxxx> ACK. > + * The externally visible transitions are handled with the help of the following > + * callbacks included in this structure: > + * > + * @prepare: Prepare the device for the upcoming transition, but do NOT change > + * its hardware state. Prevent new children of the device from being > + * registered and prevent new calls to the probe method from being made > + * after @prepare() returns. Also, if a concurrent child registration > + * or a call to the probe method already in progress is detected by > + * @prepare(), it may return -EAGAIN, so that the PM core can execute it > + * once again (e.g. after suspending the newly registered child) to recover > + * from the race condition. This method is executed for all kinds of > + * suspend transitions and is immediately followed by one of the suspend > + * callbacks: @suspend(), @freeze(), @poweroff(), or @quiesce(). > + * > + * @complete: Undo the changes made by @prepare(). This method is executed for > + * all kinds of resume transitions, immediately following one of the resume > + * callbacks: @resume(), @thaw(), @restore(), or @recover(). Also executed > + * if a suspend callback (@suspend(), @freeze(), @poweroff(), @quiesce()) > + * immediately following a successful @prepare() fails OR if a new child > + * of the device has been registered during @prepare(). So... we do prepare() but it detects new child, so it returns -EAGAIN. so we call complete() based on description above ...and then we call prepare() to suspend again? > + * @suspend: Executed before putting the system into a sleep state in which the > + * contents of main memory are preserved. Quiesce the device, put it into content....is? > + * @resume: Executed after waking the system up from a sleep state in which the > + * contents of main memory were preserved. Put the device into the content...is? > + * @freeze: Hibernation-specific, executed before creating a hibernation image. > + * Quiesce operations so that a consistent image can be created, but do NOT > + * otherwise put the device into a low power device state and do NOT emit > + * system wakeup events. Save in main memory the device settings to be "Save device settings (used by @restore()) into main memory"? > + * @quiesce: Hibernation-specific, executed after loading a hibernation image > + * and before restoring the contents of main memory from it. Quiesce > + * operations so that the contents of main memory can be restored from the operations, so ? Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html pomozte zachranit klanovicky les: http://www.ujezdskystrom.info/ -- 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
