From: Lin Ming <ming.m.lin@xxxxxxxxx>
Subject: [PATCH] acpi: fix early DSDT dmi check warnings on ia64
Tony Luck saw a lot of warning messages on ia64:
WARNING: at drivers/firmware/dmi_scan.c:423 dmi_matches+0x70/0x160()
dmi check: not initialized yet.
This is caused by commit aa2110c(ACPI: add boot option acpi=copy_dsdt to fix corrupt DSDT).
DMI is not initialized yet in acpi_early_init.
This patch checks the availability of DMI to avoid the warnings.
Tested-by: Tony Luck <tony.luck@xxxxxxxxx>
Signed-off-by: Lin Ming <ming.m.lin@xxxxxxxxx>
---
drivers/acpi/bus.c | 4 +++-
1 files changed, 3 insertions(+), 1 deletions(-)
diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
index 49af19b..047de07 100644
--- a/drivers/acpi/bus.c
+++ b/drivers/acpi/bus.c
@@ -847,8 +847,10 @@ void __init acpi_early_init(void)
/*
* If the machine falls into the DMI check table,
* DSDT will be copied to memory
+ * Only check x86, it's too early to check dmi for ia64
*/
- dmi_check_system(dsdt_dmi_table);
+ if (dmi_available)
+ dmi_check_system(dsdt_dmi_table);
status = acpi_reallocate_root_table();
if (ACPI_FAILURE(status)) {
--
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