4.16-stable review patch. If anyone has any objections, please let me know.
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From: Mika Westerberg mika.westerberg@linux.intel.com
[ Upstream commit cc6a0e315a68e5db85bea347b0c5b0fe4a9a5904 ]
At least on one Dell system the PNP motherboard resources device includes resources used by WDAT table. Since PNP gets initialized before WDAT it results following error and no watchdog:
platform wdat_wdt: failed to claim resource 3: [io 0x046a-0x046c] ACPI: watchdog: Device creation failed: -16
Now, the PNP system driver is already accustomed with the situation that it cannot reserve all those motherboard resources because drivers using those might have reserved them already. In addition putting WDAT table resources under motherboard resources device makes sense in general.
Fix this by initializing WDAT right before PNP. This allows WDAT to reserve all its resources and still keeps PNP system driver happy.
Reported-by: Shubhrata.Priyadarsh@dell.com Reported-by: Takashi Iwai tiwai@suse.de Signed-off-by: Mika Westerberg mika.westerberg@linux.intel.com Acked-by: Guenter Roeck linux@roeck-us.net Signed-off-by: Rafael J. Wysocki rafael.j.wysocki@intel.com Signed-off-by: Sasha Levin alexander.levin@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/acpi/scan.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/acpi/scan.c +++ b/drivers/acpi/scan.c @@ -2150,10 +2150,10 @@ int __init acpi_scan_init(void) acpi_cmos_rtc_init(); acpi_container_init(); acpi_memory_hotplug_init(); + acpi_watchdog_init(); acpi_pnp_init(); acpi_int340x_thermal_init(); acpi_amba_init(); - acpi_watchdog_init(); acpi_init_lpit();
acpi_scan_add_handler(&generic_device_handler);