From: Rafael J. Wysocki Date: Sun, 16 Jan 2011 19:44:22 +0000 (+0100) Subject: ACPI: Fix boot problem related to APEI with acpi_disabled set X-Git-Tag: firefly_0821_release~7613^2~2679 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=d3072e6a7e9bf7aca200370317f8e297be360b17;p=firefly-linux-kernel-4.4.55.git 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 Signed-off-by: Rafael J. Wysocki Signed-off-by: Linus Torvalds --- diff --git a/drivers/acpi/apei/hest.c b/drivers/acpi/apei/hest.c index 4ee58e72b730..abda3786a5d7 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 d9766797cd98..85249395623b 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;