From eb7f43c4adb4a789f99f53916182c3401b4e33c7 Mon Sep 17 00:00:00 2001 From: "Rafael J. Wysocki" Date: Thu, 10 Aug 2017 00:34:23 +0200 Subject: [PATCH] ACPI / scan: Enable GPEs before scanning the namespace On some systems the platform firmware expects GPEs to be enabled before the enumeration of devices and if that expectation is not met, the systems in question may not boot in some situations. For this reason, change the initialization ordering of the ACPI subsystem to make it enable GPEs before scanning the namespace for the first time in order to enumerate devices. Reported-by: Mika Westerberg Suggested-by: Mika Westerberg Signed-off-by: Rafael J. Wysocki Acked-by: Lv Zheng Tested-by: Mika Westerberg --- drivers/acpi/scan.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c index 70fd5502c284..b7bdf9d0f5c0 100644 --- a/drivers/acpi/scan.c +++ b/drivers/acpi/scan.c @@ -2058,6 +2058,9 @@ int __init acpi_scan_init(void) acpi_get_spcr_uart_addr(); } + acpi_gpe_apply_masked_gpes(); + acpi_update_all_gpes(); + mutex_lock(&acpi_scan_lock); /* * Enumerate devices in the ACPI namespace. @@ -2082,9 +2085,6 @@ int __init acpi_scan_init(void) } } - acpi_gpe_apply_masked_gpes(); - acpi_update_all_gpes(); - acpi_scan_initialized = true; out: