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authorRafael J. Wysocki <rjw@sisk.pl>2011-01-16 20:44:22 +0100
committerLinus Torvalds <torvalds@linux-foundation.org>2011-01-16 11:56:26 -0800
commitd3072e6a7e9bf7aca200370317f8e297be360b17 (patch)
treeaaeae900e1942aef892276b4ddb5c85e4882745a /drivers/acpi
parentfc8fe1e992ae0326a88edbe4d6793e840bbdd4ff (diff)
downloadlinux-linaro-android-d3072e6a7e9bf7aca200370317f8e297be360b17.tar.gz
ACPI: Fix boot problem related to APEI with acpi_disabled set
Commit 415e12b23792 ("PCI/ACPI: Request _OSC control once for each root bridge (v3)") put the acpi_hest_init() call in acpi_pci_root_init() into a wrong place, presumably because the author confused acpi_pci_disabled with acpi_disabled. Bring the code ordering in acpi_pci_root_init() back to sanity. Additionally, make sure that hest_disable is set when acpi_disabled is set, which is going to prevent acpi_hest_parse(), that still may be executed for acpi_disabled=1 through aer_acpi_firmware_first(), from crashing because of uninitialized hest_tab. Reported-and-tested-by: Andres Salomon <dilinger@queued.net> Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/acpi')
-rw-r--r--drivers/acpi/apei/hest.c6
-rw-r--r--drivers/acpi/pci_root.c4
2 files changed, 5 insertions, 5 deletions
diff --git a/drivers/acpi/apei/hest.c b/drivers/acpi/apei/hest.c
index 4ee58e72b73..abda3786a5d 100644
--- a/drivers/acpi/apei/hest.c
+++ b/drivers/acpi/apei/hest.c
@@ -201,14 +201,14 @@ void __init acpi_hest_init(void)
int rc = -ENODEV;
unsigned int ghes_count = 0;
- if (acpi_disabled)
- return;
-
if (hest_disable) {
pr_info(HEST_PFX "Table parsing disabled.\n");
return;
}
+ if (acpi_disabled)
+ goto err;
+
status = acpi_get_table(ACPI_SIG_HEST, 0,
(struct acpi_table_header **)&hest_tab);
if (status == AE_NOT_FOUND) {
diff --git a/drivers/acpi/pci_root.c b/drivers/acpi/pci_root.c
index d9766797cd9..85249395623 100644
--- a/drivers/acpi/pci_root.c
+++ b/drivers/acpi/pci_root.c
@@ -633,11 +633,11 @@ static int acpi_pci_root_remove(struct acpi_device *device, int type)
static int __init acpi_pci_root_init(void)
{
+ acpi_hest_init();
+
if (acpi_pci_disabled)
return 0;
- acpi_hest_init();
-
pci_acpi_crs_quirks();
if (acpi_bus_register_driver(&acpi_pci_root_driver) < 0)
return -ENODEV;