Hello, On Fri, Jan 07, 2011 at 10:55:14AM +0800, Luo Dislo wrote: > I am using AHCI driver, when CONFIG_SATA_PMP is set and the ahci > driver DOES NOT have AHCI_HFLAG_NO_PMP. Libata sends Software Reset > with PMP=0xF, trying to detect if Port Multiplier connected to the > port. Unfortunately, if I plugged in general Hard drive, my > controller failed to identify the hard drive. > > What I observed was that libata always sent Software Reset with > PMP=0xF and I guessed expecting signature is 0x96690101. I think > libata should give up if the device does not return the Port > Multiplier signature at the first time and take the signature value > from device as the real device connnecting to the port now. > > What we said "support" PMP does not mean the port can only connnect > to Port Multiplier. It might connect with hard drive or ATAPI > device. Which controller is this? Can you please post the output of "lspci -nn"? SB600 had this problem and needed workaround but later SBs fixed it. Looks like someone else screwed up similarly. 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
