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path: root/drivers/firmware/dmi_scan.c
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Diffstat (limited to 'drivers/firmware/dmi_scan.c')
-rw-r--r--drivers/firmware/dmi_scan.c22
1 files changed, 16 insertions, 6 deletions
diff --git a/drivers/firmware/dmi_scan.c b/drivers/firmware/dmi_scan.c
index 455575be356..3e526b6d00c 100644
--- a/drivers/firmware/dmi_scan.c
+++ b/drivers/firmware/dmi_scan.c
@@ -15,6 +15,11 @@
*/
static char dmi_empty_string[] = " ";
+/*
+ * Catch too early calls to dmi_check_system():
+ */
+static int dmi_initialized;
+
static const char * __init dmi_string_nosave(const struct dmi_header *dm, u8 s)
{
const u8 *bp = ((u8 *) dm) + dm->length;
@@ -366,7 +371,7 @@ void __init dmi_scan_machine(void)
if (efi_enabled) {
if (efi.smbios == EFI_INVALID_TABLE_ADDR)
- goto out;
+ goto error;
/* This is called as a core_initcall() because it isn't
* needed during early boot. This also means we can
@@ -374,13 +379,13 @@ void __init dmi_scan_machine(void)
*/
p = dmi_ioremap(efi.smbios, 32);
if (p == NULL)
- goto out;
+ goto error;
rc = dmi_present(p + 0x10); /* offset of _DMI_ string */
dmi_iounmap(p, 32);
if (!rc) {
dmi_available = 1;
- return;
+ goto out;
}
}
else {
@@ -391,19 +396,22 @@ void __init dmi_scan_machine(void)
*/
p = dmi_ioremap(0xF0000, 0x10000);
if (p == NULL)
- goto out;
+ goto error;
for (q = p; q < p + 0x10000; q += 16) {
rc = dmi_present(q);
if (!rc) {
dmi_available = 1;
dmi_iounmap(p, 0x10000);
- return;
+ goto out;
}
}
dmi_iounmap(p, 0x10000);
}
- out: printk(KERN_INFO "DMI not present or invalid.\n");
+ error:
+ printk(KERN_INFO "DMI not present or invalid.\n");
+ out:
+ dmi_initialized = 1;
}
/**
@@ -424,6 +432,8 @@ int dmi_check_system(const struct dmi_system_id *list)
int i, count = 0;
const struct dmi_system_id *d = list;
+ WARN(!dmi_initialized, KERN_ERR "dmi check: not initialized yet.\n");
+
while (d->ident) {
for (i = 0; i < ARRAY_SIZE(d->matches); i++) {
int s = d->matches[i].slot;