Gwendal Grignou wrote:
At reset time, according to the SATA state machine in SATA spec [16.3.3.5.1] A PM waits for a FIS from the host to port 0xF to be fully initialized. If for any reason the PM does not issue PHYRDY fast enough or other problem the host decide there is no device on the port, it will not issue a FIS, and the PM will never be seen.
.. Yes, nothing special there -- libata does all of that (and more).
A PM will not send asynchronous notification for itself, only to devices connected to it [and the host controller must be able to handle it]. Maybe polling SATA port could help?
.. That's what Tejun meant by a "hotplug even afterwards". Except he was referring to the hotplug mechanism in the host side chipset/driver, which is based on PHYRDY, not on any form of AN from the PM. So the issue is likely that we simply will need hotplug support in sata_mv before this specific unplug/replug Sil PM works. No big deal, then -- IRQ/EH/hotplug patches are next in the pipeline for sata_mv, later this week if all goes well. Cheers -- 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
