On 2 August 2011 11:27, Vasily Khoruzhick <anarsoul@xxxxxxxxx> wrote: > Could be usefull if it's not possible to keep power on the card > when host goes into suspend. If it's not possible to keep power during suspend, then I don't see why you need to explicitly turn it off on the way down. If power can be maintained, this is going to confuse userspace. If the network interface is up while you go into suspend, this code would kick in and power down the device. Then, during resume, it would power it up again. During this whole time, the network interface has remained UP, so userspace isn't aware that anything has happened. But, since the hardware has been powered off and on again, it has lost all state (association, encryption keys, etc). The way we handle this in libertas_sdio is that if we don't want the card powered during suspend, we ask the MMC layer to remove the device. This causes the remove function to be run, and the interface disappears. During resume, it gets probed again from scratch, which then prompts userspace into deciding which network to connect to, reprogramming keys, etc. Daniel -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
