diff options
| -rw-r--r-- | drivers/acpi/acpi_memhotplug.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/acpi/acpi_memhotplug.c b/drivers/acpi/acpi_memhotplug.c index 9090b5acc5e3..6bcd9e8e7bcb 100644 --- a/drivers/acpi/acpi_memhotplug.c +++ b/drivers/acpi/acpi_memhotplug.c @@ -85,6 +85,8 @@ struct acpi_memory_device { struct list_head res_list; }; +static int acpi_hotmem_initialized; + static acpi_status acpi_memory_get_resource(struct acpi_resource *resource, void *context) { @@ -438,6 +440,15 @@ static int acpi_memory_device_start (struct acpi_device *device) struct acpi_memory_device *mem_device; int result = 0; + /* + * Early boot code has recognized memory area by EFI/E820. + * If DSDT shows these memory devices on boot, hotplug is not necessary + * for them. So, it just returns until completion of this driver's + * start up. + */ + if (!acpi_hotmem_initialized) + return 0; + mem_device = acpi_driver_data(device); if (!acpi_memory_check_device(mem_device)) { @@ -537,6 +548,7 @@ static int __init acpi_memory_device_init(void) return -ENODEV; } + acpi_hotmem_initialized = 1; return 0; } |