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ACPI: Ingore the memory block with zero block size in course of memory hotplug

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If the memory block size is zero, ignore it and don't do the memory hotplug
flowchart. Otherwise it will complain the following warning message:
  >System RAM resource 0 - ffffffffffffffff cannot be added

Signed-off-by: Zhao Yakui <yakui.zhao@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Zhao Yakui 2009-07-07 10:56:11 +08:00 committed by Len Brown
parent aa7b2b2e97
commit 5d2619fca7
1 changed files with 15 additions and 3 deletions
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18
drivers/acpi/acpi_memhotplug.c
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@ -242,7 +242,12 @@ static int acpi_memory_enable_device(struct acpi_memory_device *mem_device)
num_enabled++; num_enabled++;
continue; continue;
} }
/*
* If the memory block size is zero, please ignore it.
* Don't try to do the following memory hotplug flowchart.
*/
if (!info->length)
continue;
if (node < 0) if (node < 0)
node = memory_add_physaddr_to_nid(info->start_addr); node = memory_add_physaddr_to_nid(info->start_addr);
@ -257,8 +262,15 @@ static int acpi_memory_enable_device(struct acpi_memory_device *mem_device)
mem_device->state = MEMORY_INVALID_STATE; mem_device->state = MEMORY_INVALID_STATE;
return -EINVAL; return -EINVAL;
} }
/*
return result; * Sometimes the memory device will contain several memory blocks.
* When one memory block is hot-added to the system memory, it will
* be regarded as a success.
* Otherwise if the last memory block can't be hot-added to the system
* memory, it will be failure and the memory device can't be bound with
* driver.
*/
return 0;
} }
static int acpi_memory_powerdown_device(struct acpi_memory_device *mem_device) static int acpi_memory_powerdown_device(struct acpi_memory_device *mem_device)