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authorAndi Kleen <ak@suse.de>2006-03-25 16:30:19 +0100
committerLinus Torvalds <torvalds@g5.osdl.org>2006-03-25 09:10:54 -0800
commitf083a329e63d471a5e9238e837772b1b76c218db (patch)
tree3d0955a4190ca886c3efa2e93e725d843e7d907b /arch
parente6fc99c6aba0350a3c4c0206b7047d4893491485 (diff)
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[PATCH] x86_64: Clean up and tweak ACPI blacklist year code
- 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>
Diffstat (limited to 'arch')
-rw-r--r--arch/i386/kernel/dmi_scan.c30
1 files changed, 30 insertions, 0 deletions
diff --git a/arch/i386/kernel/dmi_scan.c b/arch/i386/kernel/dmi_scan.c
index ca2a0cb..d2dfd9c 100644
--- a/arch/i386/kernel/dmi_scan.c
+++ b/arch/i386/kernel/dmi_scan.c
@@ -299,3 +299,33 @@ struct dmi_device * dmi_find_device(int type, const char *name,
return NULL;
}
EXPORT_SYMBOL(dmi_find_device);
+
+/**
+ * dmi_get_year - Return year of a DMI date
+ * @field: data index (like dmi_get_system_info)
+ *
+ * Returns -1 when the field doesn't exist. 0 when it is broken.
+ */
+int dmi_get_year(int field)
+{
+ int year;
+ char *s = dmi_get_system_info(field);
+
+ if (!s)
+ return -1;
+ if (*s == '\0')
+ return 0;
+ s = strrchr(s, '/');
+ if (!s)
+ return 0;
+
+ s += 1;
+ year = simple_strtoul(s, NULL, 0);
+ if (year && year < 100) { /* 2-digit year */
+ year += 1900;
+ if (year < 1996) /* no dates < spec 1.0 */
+ year += 100;
+ }
+
+ return year;
+}