[issue1449] AHCI panic on Intel 6321ESB AHCI

[Matthew Dillon]

:Alexander Polakov <polachok at gmail.com> added the comment:
:
:I changed value to 1000 on line 143 and added ahci_os_sleep(1000) before re=
:turn=20
:in ahci_init. Still panics.

    Rumko is now getting a panic with a AHCI1.0 Intel chipset with the
    changes that he was NOT getting before the changes.

    The results are very similar to what you got... what appears to be
    random memory corruption and in Rumko's case an immediate machine
    reboot and the BIOS configuration got messed up as well.

    I feel they must be related issues.  If Rumko and I can figure out
    which change caused his machine to stop booting it may give me a
    good idea where to look for the problem you are reporting.

    What is really annoying to me is that the NATA driver is able to
    attach with its AHCI sub-driver.  I don't know what I am doing
    different that is causing the breakage.

					-Matt
					Matthew Dillon 
					<dillon at backplane.com>