static void __devinit acpi_pm_check_graylist(struct pci_dev *dev)
{
if (acpi_pm_good)
return;
printk(KERN_WARNING "* The chipset may have PM-Timer Bug. Due to"
" workarounds for a bug,\n"
"* this clock source is slow. If you are sure your timer"
" does not have\n"
"* this bug, please use \"acpi_pm_good\" to disable the"
" workaround\n");
acpi_pm_need_workaround();
}
/*
* PIIX4 Errata:
*
* The power management timer may return improper results when read.
* Although the timer value settles properly after incrementing,
* while incrementing there is a 3 ns window every 69.8 ns where the
* timer value is indeterminate (a 4.2% chance that the data will be
* incorrect when read). As a result, the ACPI free running count up
* timer specification is violated due to erroneous reads.
*/
static void __devinit acpi_pm_check_blacklist(struct pci_dev *dev)
{
if (acpi_pm_good)
return;
/* the bug has been fixed in PIIX4M */
if (dev->revision < 3) {
printk(KERN_WARNING "* Found PM-Timer Bug on the chipset."
" Due to workarounds for a bug,\n"
"* this clock source is slow. Consider trying"
" other clock sources\n");
acpi_pm_need_workaround();
}
}
/*
* PIIX4 Errata:
*
* The power management timer may return improper results when read.
* Although the timer value settles properly after incrementing,
* while incrementing there is a 3 ns window every 69.8 ns where the
* timer value is indeterminate (a 4.2% chance that the data will be
* incorrect when read). As a result, the ACPI free running count up
* timer specification is violated due to erroneous reads.
*/
static void __devinit acpi_pm_check_blacklist(struct pci_dev *dev)
{
u8 rev;
if (acpi_pm_good)
return;
pci_read_config_byte(dev, PCI_REVISION_ID, &rev);
/* the bug has been fixed in PIIX4M */
if (rev < 3) {
printk(KERN_WARNING "* Found PM-Timer Bug on the chipset."
" Due to workarounds for a bug,\n"
"* this clock source is slow. Consider trying"
" other clock sources\n");
acpi_pm_need_workaround();
}
}
