From: Rafael J. Wysocki <rjw@xxxxxxx>
Commit 415e12b (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@xxxxxxxxxx>
Signed-off-by: Rafael J. Wysocki <rjw@xxxxxxx>
---
drivers/acpi/apei/hest.c | 6 +++---
drivers/acpi/pci_root.c | 4 ++--
2 files changed, 5 insertions(+), 5 deletions(-)
Index: linux-2.6/drivers/acpi/pci_root.c
===================================================================
--- linux-2.6.orig/drivers/acpi/pci_root.c
+++ linux-2.6/drivers/acpi/pci_root.c
@@ -631,11 +631,11 @@ static int acpi_pci_root_remove(struct a
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;
Index: linux-2.6/drivers/acpi/apei/hest.c
===================================================================
--- linux-2.6.orig/drivers/acpi/apei/hest.c
+++ linux-2.6/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) {
--
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