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path: root/drivers/pci/quirks.c
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Diffstat (limited to 'drivers/pci/quirks.c')
-rw-r--r--drivers/pci/quirks.c27
1 files changed, 27 insertions, 0 deletions
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index de3bbc88fb2..53a887e1014 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -683,6 +683,33 @@ static void __devinit quirk_vt82c598_id(struct pci_dev *dev)
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C597_0, quirk_vt82c598_id );
+#ifdef CONFIG_ACPI_SLEEP
+
+/*
+ * Some VIA systems boot with the abnormal status flag set. This can cause
+ * the BIOS to re-POST the system on resume rather than passing control
+ * back to the OS. Clear the flag on boot
+ */
+static void __devinit quirk_via_abnormal_poweroff(struct pci_dev *dev)
+{
+ u32 reg;
+
+ acpi_hw_register_read(ACPI_MTX_DO_NOT_LOCK, ACPI_REGISTER_PM1_STATUS,
+ &reg);
+
+ if (reg & 0x800) {
+ printk("Clearing abnormal poweroff flag\n");
+ acpi_hw_register_write(ACPI_MTX_DO_NOT_LOCK,
+ ACPI_REGISTER_PM1_STATUS,
+ (u16)0x800);
+ }
+}
+
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8235, quirk_via_abnormal_poweroff);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8237, quirk_via_abnormal_poweroff);
+
+#endif
+
/*
* CardBus controllers have a legacy base address that enables them
* to respond as i82365 pcmcia controllers. We don't want them to