ahci: Blacklist HP Compaq 6720s that spins off disks during ACPI power off

Blacklist HP Compaq 6720s so that it doesn't play a "spin down,
spin up, spin down" ping-pong with the hard disk during system
power off.

Signed-off-by: Maciej Rutecki <maciej.rutecki@gmail.com>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index 98d7a9fbb7ed338bbc3fcedf30c49f32c4132020..699789bc9ea6b01360816d348d96fb49f22f0640 100644 (file)
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -2565,6 +2565,15 @@ static bool ahci_broken_system_poweroff(struct pci_dev *pdev)
                        /* PCI slot number of the controller */
                        .driver_data = (void *)0x1FUL,
                },
+               {
+                       .ident = "HP Compaq 6720s",
+                       .matches = {
+                               DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
+                               DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6720s"),
+                       },
+                       /* PCI slot number of the controller */
+                       .driver_data = (void *)0x1FUL,
+               },
 
                { }     /* terminate list */
        };