On Fri, Jul 22, 2011 at 2:41 AM, Tejun Heo [off-list ref] wrote:

This is another attempt at fixing the same problem that 270dac35c2
(libata: ahci_start_engine compliant to AHCI spec) tried to solve.
Unfortunately, 270dac35c2 created regressions for a lot more common
controllers and got reverted.

I've tested this on my problem controller with success so far. Also
tried on Dell Latitude E6410 (with various boot, suspend, resume,
unplug power, etc. cycles) with no problem. Thanks Tejun!

In case it's useful I'll give a tested-by:

Tested-by: Brian Norris <computersforpeace@gmail.com>