Hello, On Thu, Dec 15, 2011 at 09:12:49PM +0800, Lin Ming wrote: > I use eSATA to test disk hot plug. > With previous 3 patches applied, disk hot plug does not wok > when ahci port/controller is runtime suspended. > > There are 2 cases we need to handle for hot plug: > > 1. port suspended, controller active > Is IRQ need to be enabled for port to detect hot plug? > > 2. port suspended, controller suspended > Will controller get a PME when hot plug happens? > > I'm still investigating hot plug support. > > Anyone has comment? SATA link detection requires hot wire and keeping wire hot takes power. I think it's fair tradeoff to not support hotplug while powersaving is on. We have warm plug mechanism (the SCSI rescan trigger via sysfs) after all. It would be nice if things like that is somehow exported to userland in easy way tho (cc'ing Kay), but I frankly don't have much idea where that would fit. Thanks. -- tejun -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
