On Mon, 31 Jan 2011, Rajendra Nayak wrote: > Can you elaborate a bit more on how/why runtime PM transitions > are disabled during system suspend, and how is it taken care > of that a runtime resume of a device works however a subsequent > runtime (re)suspend does not? I'll answer for Kevin. This is done by the PM core, in order to prevent runtime power transitions from interfering with a system power transition. The PM core increments the device's usage_count; this prevents the device from being runtime-suspended but it allows runtime-resume calls to go through. Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-i2c" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
