Mark Lord 9b2c4e0bae sata_mv wait for empty+idle
When performing EH, it is recommended to wait for the EDMA engine
to empty out requests-in-progress before disabling EDMA.

Introduce code to poll the EDMA_STATUS register for idle/empty bits
before disabling EDMA.  For non-EH operation, this will normally exit
without delay, other than the register read.

A later series of patches may focus on eliminating this and various
other register reads (when possible) throughout the driver,
but for now we're focussing on solid reliablity.

Signed-off-by: Mark Lord <mlord@pobox.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2008-05-06 11:37:39 -04:00
..
2008-05-06 11:37:39 -04:00
2008-04-21 22:38:45 +00:00
2008-05-05 15:08:38 -07:00
2008-04-29 08:06:27 -07:00
2008-05-05 12:36:34 -07:00
2008-05-01 08:03:59 -07:00
2008-04-29 08:06:18 -07:00
2008-05-01 11:15:28 -07:00
2008-05-01 08:04:00 -07:00
2008-05-01 08:04:01 -07:00
2008-04-23 21:25:35 -04:00
2008-04-24 23:57:33 +02:00
2008-04-30 08:29:52 -07:00
2008-04-30 08:29:52 -07:00