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[PATCH] x86_64: Clean up and tweak ACPI blacklist year code

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- Move the core parser into dmi_scan.c.  It can be useful for other
   subsystems too.
 - Differentiate between field doesn't exist and field is 0 or
   unparseable.  The first case is likely an old BIOS with broken ACPI,
   the later is likely a slightly buggy BIOS where someone forget to
   edit the date.  Don't blacklist in the later case.

Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Andi Kleen
2006-03-25 16:30:19 +01:00
committed by Linus Torvalds
parent e6fc99c6ab
commit f083a329e6
3 changed files with 38 additions and 21 deletions
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27
drivers/acpi/blacklist.c
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@@ -77,28 +77,13 @@ static struct acpi_blacklist_item acpi_blacklist[] __initdata = {
static int __init blacklist_by_year(void)
{
int year;
char *s = dmi_get_system_info(DMI_BIOS_DATE);
if (!s)
int year = dmi_get_year(DMI_BIOS_DATE);
/* Doesn't exist? Likely an old system */
if (year == -1)
return 1;
/* 0? Likely a buggy new BIOS */
if (year == 0)
return 0;
if (!*s)
return 0;
s = strrchr(s, '/');
if (!s)
return 0;
s += 1;
year = simple_strtoul(s, NULL, 0);
if (year < 100) { /* 2-digit year */
year += 1900;
if (year < 1996) /* no dates < spec 1.0 */
year += 100;
}
if (year < CONFIG_ACPI_BLACKLIST_YEAR) {
printk(KERN_ERR PREFIX "BIOS age (%d) fails cutoff (%d), "
"acpi=force is required to enable ACPI\n",