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102 commits

Author SHA1 Message Date
Matthew Garrett
96d60303fd ahci: Turn off DMA engines when there's no device attached 
According to section 10.3.1 of the AHCI spec, PxCMD.ST must not be set
unless there's a device attached. Following this saves us a measurable
quantity of power and does not impair hotplug support. Based on a patch
by Kristen Carlson Accardi.

Signed-off-by: Matthew Garrett <mjg@redhat.com>
Cc: Kristen Carlson Accardi <kristen.c.accardi@intel.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
 2010-05-14 17:08:01 -04:00
Anton Vorontsov
365cfa1ed5 ahci: Move generic code into libahci 
This patch should contain no functional changes, just moves code
around.

Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
 2010-05-14 17:08:01 -04:00