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ACPI: Fix boot problem related to APEI with acpi_disabled set 

Commit 415e12b237 ("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>
This commit is contained in:
Rafael J. Wysocki 2011-01-16 20:44:22 +01:00 committed by Linus Torvalds
parent fc8fe1e992
commit d3072e6a7e
2 changed files with 5 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
drivers/acpi/apei/hest.c
View File

@ -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) {

4
drivers/acpi/pci_root.c
View File

@ -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;