[Bug 243401] [patch] ahci driver problems with Marvell 88SE9230 (Dell BOSS-S1)

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=243401

--- Comment #5 from Alexander Motin <mav at FreeBSD.org> ---
Peter, your patch is inconsistent in the timeout values.  You are using 10000
on line 2614, but 5000 on lines 2634 and 2638.  That discrepancy may
potentially cause random weird effects.  Though it does not explain to me what
I see in the provided messages.  I can not match it to the patch provided.  I
guess you was running something different.

Also synchronous wait for half a second for every empty port in a system is not
great. JFYI IIRC VMware emulates AHCI with 31 port.  Have you tried to measure
time between "SATA status changed 00000000" and "SATA status changed 00000001"
messages?  It it happen faster it would allow to not increase the timeout on
line 2634, not waiting for devices on completely empty ports.

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