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libata: Power off empty ports

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Give users the option of completely powering off unoccupied
SATA ports using the existing min_power link_power_management_policy
option.  When the use selects this option on an empty port, we
will power the port off by setting DET to off.  For occupied ports,
behavior is unchanged.

Signed-off-by: Kristen Carlson Accardi <kristen@linux.intel.com>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
This commit is contained in:
Kristen Carlson Accardi
2011-03-04 10:24:11 -08:00
committed by Jeff Garzik
parent 0afc6f5ba9
commit 8a745f1f39
3 changed files with 10 additions and 3 deletions
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2
drivers/ata/libata-eh.c
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@@ -3423,7 +3423,7 @@ fail:
return rc;
}
static int ata_link_nr_enabled(struct ata_link *link)
int ata_link_nr_enabled(struct ata_link *link)
{
struct ata_device *dev;
int cnt = 0;