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authorMikulas Patocka <mikulas@artax.karlin.mff.cuni.cz>2011-10-12 08:31:51 +0400
committerDavid S. Miller <davem@davemloft.net>2011-10-14 01:04:49 +0400
commit839e7306e5d1ebd57cf12e83d9910b8b2dbe79ba (patch)
tree85977ca70f0181dac828cd6b7e2f294f2c5c4a0f /drivers/ide/triflex.c
parentdc9c0beecfeb4866fdbc245c295cf30d340b702c (diff)
downloadlinux-839e7306e5d1ebd57cf12e83d9910b8b2dbe79ba.tar.xz
IDE: Don't powerdown Compaq Triflex IDE device on suspend
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 feb22b7f8e62b1b987a3a1dbad95af767a1df832 ("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>
Diffstat (limited to 'drivers/ide/triflex.c')
-rw-r--r--drivers/ide/triflex.c16
1 files changed, 15 insertions, 1 deletions
diff --git a/drivers/ide/triflex.c b/drivers/ide/triflex.c
index e53a1b78378b..281c91426345 100644
--- a/drivers/ide/triflex.c
+++ b/drivers/ide/triflex.c
@@ -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,
};