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ATA: Don't powerdown Compaq Triflex IDE device on suspend

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Don't powerdown Compaq Triflex IDE device on suspend

This fixes APM suspend on Compaq Armada 7400.
APM BIOS doesn't suspend if IDE is powered down when suspending.
The Triflex controller is found only on old Compaq boards,
so this patch will hopefully have no side effects.

Signed-off-by: Mikulas Patocka <mikulas@artax.karlin.mff.cuni.cz>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
This commit is contained in:
Mikulas Patocka 2011-05-15 22:33:19 +02:00 committed by Jeff Garzik
parent 5f4e206666
commit bfeec8ca15
1 changed files with 22 additions and 1 deletions
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23
drivers/ata/pata_triflex.c
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@ -210,13 +210,34 @@ static const struct pci_device_id triflex[] = {
{ },
};
#ifdef CONFIG_PM
static int triflex_ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg)
{
struct ata_host *host = dev_get_drvdata(&pdev->dev);
int rc = 0;
rc = ata_host_suspend(host, mesg);
if (rc)
return rc;
/*
* We must not disable or powerdown the device.
* APM bios refuses to suspend if IDE is not accessible.
*/
pci_save_state(pdev);
return 0;
}
#endif
static struct pci_driver triflex_pci_driver = {
.name = DRV_NAME,
.id_table = triflex,
.probe = triflex_init_one,
.remove = ata_pci_remove_one,
#ifdef CONFIG_PM
.suspend = ata_pci_device_suspend,
.suspend = triflex_ata_pci_device_suspend,
.resume = ata_pci_device_resume,
#endif
};