From beeaeeac0f3ea0ad59fbf2ff86e956b1504e16f6 Mon Sep 17 00:00:00 2001 From: "Rafael J. Wysocki" Date: Thu, 7 May 2015 21:19:39 +0200 Subject: ACPI / init: Fix the ordering of acpi_reserve_resources() [ Upstream commit b9a5e5e18fbf223502c0b2264c15024e393da928 ] Since acpi_reserve_resources() is defined as a device_initcall(), there's no guarantee that it will be executed in the right order with respect to the rest of the ACPI initialization code. On some systems this leads to breakage if, for example, the address range that should be reserved for the ACPI fixed registers is given to the PCI host bridge instead if the race is won by the wrong code path. Fix this by turning acpi_reserve_resources() into a void function and calling it directly from within the ACPI initialization sequence. Reported-and-tested-by: George McCollister Link: http://marc.info/?t=143092384600002&r=1&w=2 Cc: All applicable Signed-off-by: Rafael J. Wysocki Signed-off-by: Sasha Levin --- drivers/acpi/osl.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c index 9964f70be98d..838359818228 100644 --- a/drivers/acpi/osl.c +++ b/drivers/acpi/osl.c @@ -182,7 +182,7 @@ static void __init acpi_request_region (struct acpi_generic_address *gas, request_mem_region(addr, length, desc); } -static int __init acpi_reserve_resources(void) +static void __init acpi_reserve_resources(void) { acpi_request_region(&acpi_gbl_FADT.xpm1a_event_block, acpi_gbl_FADT.pm1_event_length, "ACPI PM1a_EVT_BLK"); @@ -211,10 +211,7 @@ static int __init acpi_reserve_resources(void) if (!(acpi_gbl_FADT.gpe1_block_length & 0x1)) acpi_request_region(&acpi_gbl_FADT.xgpe1_block, acpi_gbl_FADT.gpe1_block_length, "ACPI GPE1_BLK"); - - return 0; } -device_initcall(acpi_reserve_resources); void acpi_os_printf(const char *fmt, ...) { @@ -1839,6 +1836,7 @@ acpi_status __init acpi_os_initialize(void) acpi_status __init acpi_os_initialize1(void) { + acpi_reserve_resources(); kacpid_wq = alloc_workqueue("kacpid", 0, 1); kacpi_notify_wq = alloc_workqueue("kacpi_notify", 0, 1); kacpi_hotplug_wq = alloc_ordered_workqueue("kacpi_hotplug", 0); -- cgit v1.2.3