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IDE: 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.

This patch fixes a suspend regression introduced in
feb22b7f8e ("ide: add proper PCI PM
support (v2)").

Signed-off-by: Mikulas Patocka <mikulas@artax.karlin.mff.cuni.cz>
[bart: add commit's summary in parens]
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Mikulas Patocka 2011-10-12 04:31:51 +00:00 committed by David S. Miller
parent dc9c0beecf
commit 839e7306e5
1 changed files with 15 additions and 1 deletions
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16
drivers/ide/triflex.c
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@ -113,12 +113,26 @@ static const struct pci_device_id triflex_pci_tbl[] = {
};
MODULE_DEVICE_TABLE(pci, triflex_pci_tbl);
#ifdef CONFIG_PM
static int triflex_ide_pci_suspend(struct pci_dev *dev, pm_message_t state)
{
/*
* We must not disable or powerdown the device.
* APM bios refuses to suspend if IDE is not accessible.
*/
pci_save_state(dev);
return 0;
}
#else
#define triflex_ide_pci_suspend NULL
#endif
static struct pci_driver triflex_pci_driver = {
.name = "TRIFLEX_IDE",
.id_table = triflex_pci_tbl,
.probe = triflex_init_one,
.remove = ide_pci_remove,
.suspend = ide_pci_suspend,
.suspend = triflex_ide_pci_suspend,
.resume = ide_pci_resume,
};