ACPI: fix acpi_hest_firmware_first_pci() caused oops

Shaohua Li · lenb · commit 4bdae98f1a45 · 2010-05-06T02:39:06.000-04:00
acpi_hest_firmware_first_pci() could be called when acpi is disabled
and cause system oops.

Signed-off-by: Shaohua Li &lt;shaohua.li@intel.com&gt;
Signed-off-by: Len Brown &lt;len.brown@intel.com&gt;
diff --git a/drivers/acpi/hest.c b/drivers/acpi/hest.c
@@ -123,6 +123,10 @@ int acpi_hest_firmware_first_pci(struct pci_dev *pci)
 {
 	acpi_status status = AE_NOT_FOUND;
 	struct acpi_table_header *hest = NULL;
+
+	if (acpi_disabled)
+		return 0;
+
 	status = acpi_get_table(ACPI_SIG_HEST, 1, &hest);
 
 	if (ACPI_SUCCESS(status)) {
